Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operating speed of the engine in application, environmental conditions, maintenance, and other variables. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! For a better experience, please enable JavaScript in your browser before proceeding. My bore is dead on then. .Pm]T1 It is EASY and FREE . World Formula premier clutch with motorbike type chain. MENU > General Purpose Engine & DC Power unit > GX390 > Owner's Manual Please select your country. Purchase now to take advantage of our free shipping and quick turnaround time. hmm. 0000004630 00000 n 0000008035 00000 n It is a 389cc, 11.7 HP and 3600 RPM. Blew connecting rod, broke bottom of piston. Flange and stub are welded. 0000017780 00000 n 0000236258 00000 n Golf Cart Kit Honda . Straight shaft 1" x 2-31/64", 1/4" keyway, Elect Start, 10A Charge, Oil Alert. Exhaust is key for making torque.a longer tube and a small amount of backpressure (a muffler) usually does the trick on most gas NA engines. %%EOF I 4H~f1|;d/(;pQ \DD\zd7p$00Xli(b FF$pr ^v endstream endobj 378 0 obj <>/Filter/FlateDecode/Index[8 341]/Length 34/Size 349/Type/XRef/W[1 1 1]>>stream *The power rating of the engine indicated in this document is the net power output tested on a production engine for the engine model and measured in accordance with SAE J1349 at 3,600 rpm (net power) and at 2,500 rpm (max net torque). 0000238238 00000 n 0000258383 00000 n Upon dissassembly, I measured the bore at 3.465-3.466 from best to worst in the cylinder. 0000004675 00000 n . Insert the thickness gauge of proper thickness between the ignition coil and flywheel. 0000052738 00000 n GX390; Engine Type: Air-cooled 4-stroke OHV: Air-cooled 4-stroke OHV: Bore x Stroke: 88 X 64 mm: 88 X 64 mm: Displacement: . 0000026746 00000 n Guys the dyno readings might not be 100% correct as I know that with certain dyno's you need to have the correct weighted flywheel to give accurate figures. Mass production engines may vary from this value. 0000052483 00000 n 0000235492 00000 n 0000001123 00000 n Honda Engines GX390 Exploded View parts lookup by model. I hope the numbers you gave me are for a different engine - maybe a GXV340 has this smaller bore? 0000010327 00000 n 0000027158 00000 n Cam thrust plate bolts 8-10 ft-lbs. It looks just like a Honda GX390, 13 hp. Ive never seen bolts included in the box of a predator. ?P9{J?9.qZ{7q#vgmT& )H U5q(u6LFi8 Enter your model number in the search box above or just choose from the list below. 0000004855 00000 n Compare up to 3 models 0000001306 00000 n He never mentioned any RPM numbers. 0000004757 00000 n Hondabond 4 (OEM) Liquid Gasket . This Honda engine is a 4-stroke OHC single cylinder, which is a 88 X 64 stroke. Thanks newz7151. Absolutely! I guess I need to hone it more, I just don't want to "bore" the cylinder any with the hone. http://www.vegascarts.com/product-p/gp966comp.htm, http://www.vegascarts.com/category-s/1822.htm. This online declaration honda gx390 engine torque specs can be one of the options to accompany you similar to having further time. From spring 2010 onwards, Honda producing the updated version of GX390 engines with larger displacement. Official specs and features for the Honda GX340 small engine. trailer <<76564F700D2346119EDF20DC67F08D00>]/Prev 90097/XRefStm 1123>> startxref 0 %%EOF 379 0 obj <>stream We run almost standard 390cc Honda engines with 2mm skimmed heads and advancing the timing key by 2mm. Maybe someone from Denver CO can jump in? 0000239426 00000 n . 0000026719 00000 n Ultimate Karting. 794572 Briggs & Stratton OEM 793224 791888 699109 698445 31E777 Carburetor Assy 69.98 25.95. 0000003698 00000 n ,q G '7 GX390. All Power America Steele Gentron JF420-I-04B Generator Carburetor Assembly 89.98 34.95. at cont. I don't know what happened but can you post the message here instead? The better it can breathe, the more power you get. It will require an upgraded spring package, billet rod, and billet flywheel. 0000124013 00000 n {5#rssb~/Z%>w%>JD]G/bzWRLb?9\M]S7'F6$kUjERiz3A)sxZ>~f Down side with small ports is you kill upper rpm power. Engines according to our dyno are not allowed to produce more than 24hsp and 49nm of torque. Looks like an increase of 1.5 Newton meters just with that? rated power 3.5 L/h - 3600 rpm Engine oil capacity 1.1 Liter Dimensions (L x W x H) 406 x 460 x 448 mm Dry weight 31.7 kg SPARE PARTS 0000006412 00000 n as follows; Rod torque, 8.7-11.5 Ft-lb. On the camshaft, an earlier exhaust valve opening, a longer duration to get more air and fuel in (and exhaust out) and a little more lift would be beneficial. This part is no longer available and has been replaced by Oregon 36-325. Features Specifications Please select a model from the drop-down (s) below to view the specifications. Somebody walked off with my 390 manual. 0000002883 00000 n %PDF-1.4 % I did it a couple of times for about 30-45 seconds, then cleaned it out with a cloth. 0000124389 00000 n This is the official service website for Honda, Power Products, Marine, General Purpose Engine & DC Power unit, GX390. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 794572 Carburetor Briggs & Stratton Replaces # 793224 791888 792358 792171 Assy 52.98 19.99. 0000004405 00000 n Fastener Type Torque Spec Main cap bolts 95-105 ft-lbs Connecting rod bolts 40-45 ft-lbs. Shop our large selection of Honda Engines GX390 GX Series OEM Parts, original equipment manufacturer parts and more online or call at 717-375-1021 0000042345 00000 n Honda New GX390 Engine Standard 1" Crank, Electric Start, Oil Alert Brand: Honda 30 ratings $1,49900 See more About this item Fuel: Unleaded 86 octane or higher Governor System: Centrifugal Mass Type Air cleaner: Dual element Oil Capacity: 1.16 US qt (1.1 L) Fuel Tank Capacity: 6.4 U.S. qts (6.1 liters) Buy it with Contents for. Would not recommend doing that. Denver is above 5,000 feet. Front cover bolts 12-15 ft-lbs. 0921. 0000002306 00000 n 0000133272 00000 n 0000130930 00000 n The GX390 features more power, quieter performance, lower fuel consumption, and lower emissions than the previous version. Portable hydraulic power units, stump grinders, generators, trash pumps, pressure washers and small specialized farm equipment tasks are easily handled by the Honda GX390. Other than what the dyno has said, are there any issues? 0000048201 00000 n Hub. Thanks so much for your help. Thanks for any help. _*lx#KO=\Q uBMxlV 0000002049 00000 n net torque). I almost bought a bunch of parts, but Vegascarts said that I would need to get the piston milled down a bit and do some minor block clearancing. I bet my bore value is dead on since it only varies .001" over the entire cylinder. Nominal bore, Standard is 3.228" with a service limit of 3.235". 35. ft) Recheck valve clearance after tightening the rocker arm pivot lock nut. $2,147.00. I know the GX390 that i have is from an old pressure washer, ill have to grab the model and see. Intake Valve. When this is the case, it is best practice to start from the center and alternate bolts/nuts while moving outward. . 0000003170 00000 n thing pulls like a mule. Combustion Cleaner (OEM) 385g . It is a slip together kit that you weld. Rewind Starter Spring (AM) GX340 - GXV620 . Price $80.00. 0000015765 00000 n rated power 3.5 L/h - 3600 rpm Engine oil capacity 1.1 Liter Dimensions (L x W x H) 406 x 460 x 448 mm Dry weight 31.7 kg 0000004720 00000 n 0000082233 00000 n It must be VERY hard. Honda specs, its something close to that from memory. start optional) Fuel tank capacity 6.1 Liter Fuel cons. I've seen this done before at the machine shop so I did it the same: Put a light coat of transmission fluid in the cylinder for lubrication then run the hone up and down gently while twisting it with a conventional drill. 0000004495 00000 n Engine has no Honda numbers. I would try take timing out and add compression like you suggested, the theory here is that without timing the engine will fall over a bit at higher rpm and keep your HP number down but the extra compression might help the midrange? Price: $10.99. 0000008105 00000 n iGX390QZNR. start optional) Fuel tank capacity 6.1 Liter Fuel cons. Got new parts. 6 73 0000012128 00000 n Xc6 8zB\@L 4DP$|o;\p>`t; bb $4ceXc[G0.htY u^, B,iT$D`XZF/@ ^ca300 3K All I want to do is put a good cross hatch in it for the rings to "bite". at cont. OK, Specs. Ouch yeah sounds like ya jammed a M8x 1.25 fastener into a 5/16 fine thread hole. My point is your calculating his power with engine rpm and torque at the output shaft after the 2:1. 0000121819 00000 n Auto Express New Honda GX390 Starter Motor with Solenoid FITS 13hp GX 390 Engine & Generator 18 $8195 FREE delivery Oct 27 - 31 Replacement Honda Lawn Mower Recoil Starter Assembly GX340 GX390 28400ZE3W01ZA 11hp 13hp Generator Parts 481 $1799 FREE delivery Sun, Oct 30 on $25 of items shipped by Amazon Or fastest delivery Wed, Oct 26 Mass production engines may vary from this value. 0000003812 00000 n lb) of torque at 2,500 rpm. You never learn anything until you admit you don't know it all some times the man in my mirror isn't so smart Hey Restorob, I didn't get a PM from you. Rewind Starter Handle (OEM) All Engines . Just invest little time to contact this on-line declaration honda gx390 engine torque specs as Oil pump bolts 23-28 ft-lbs. 78 0 obj <>stream one of the best ways I know of for improving low end torque is to raise the compression and use a head with the smallest ports possible. Loosen the ignition coil mounting bolts. Fits a Honda GX390 13 HP or Duramax 16 HP. 0000019777 00000 n I use what they call a dingle berry hone, Have sizes to fit nearly any cylinder and doesn't take but a couple ups and downs to get the perfect cross hatch. Still, without the RPM numbers, your information, as good as it is, isn't of much value. 0000004315 00000 n Straight shaft 1" x 2-31/64", 1/4" keyway, Elect Start, 18A Charge, Oil Alert. 0000233571 00000 n 0000233851 00000 n Intake manifold bolts 23-25 ft-lbs. rated power 3.5 L/h - 3600 rpm Engine oil capacity 1.1 Liter Dimensions (L x W x H) 409 x 484 x 448 mm Dry weight 37.0 kg Available for other motors, too! hbbbd`b``3 C7> L endstream endobj 350 0 obj <>/Metadata 6 0 R/Pages 5 0 R/StructTreeRoot 8 0 R/Type/Catalog/ViewerPreferences<>>> endobj 351 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 595.276 841.89]/Type/Page>> endobj 352 0 obj <>stream 0000003372 00000 n It weighs 5.40 lbs. net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Starter Recoil (el. 0000126421 00000 n The cost was just too much for me to justify though. 0000001872 00000 n , Because the 340 and 390 use the same with the exception of the bore which I forgot about. 0000004540 00000 n give a positive response me, the e-book will unquestionably sky you additional issue to read. Also curious as to the rod to crank pin clearance. For a better experience, please enable JavaScript in your browser before proceeding. HMj0Oiw#t,zMX M;:8*8~Nn}:$J:{F!-a&. Mass production engines may vary from this value.Actual power . Thanks so much for your help. 0000003565 00000 n trailer 0000004810 00000 n 0000239640 00000 n 0000158970 00000 n Can you get the plot from the dyno so you can get an idea what the torque curve looks like and where you can work on increases without going over the limit? The engine had a failed exhaust stud and a blown head-gasket (one of the 4 cylinder head. at cont. 0000004360 00000 n Is it possible to increase torque output at a given RPM range (1800-2200) doing any performance part installations for the honda gx390? I truly appreciate it. 0000259411 00000 n Halve the RPM, I'll bet they are running a 2:1 reduction wet clutch. PWP_3bJJes6DMh442@58 S#i7F00@8lp&@8kZi-t' 3F endstream endobj 353 0 obj <>stream What's your opinion? It may not display this or other websites correctly. Complete exploded views of all the major manufacturers. 0000008401 00000 n 0000004585 00000 n Oil Drain Valve (AM) Honda Oil (OEM) 10W30 / 5W30 . local Honda dealer won't help. The Honda GX390 is an industrial-style gas-powered pressure washer that provides high pressure, excellent durability and a wide range of movement, giving you an excellent cleaning tool that can deal with almost any surface. 0000002126 00000 n 0000001756 00000 n 0000048973 00000 n The ones I used were just for demonstration, to show how much HP the engine would be making if his torque number was at those RPM points. 1 5/16" muffler fits. In this video, we replace the cylinder head on a Honda GX390 engine on a 4000 PSI pressure washer. Brough a 13 hp Pro max on Ebay. HWn7}D+ &NnEENR{=3$u ! General information Dimensions and Weight Cylinder Block and Head Hope some one can help. xb``pc``d```~ The main feature of this design is the steel crankshaft hub that allows for timing changes at 2 increments. 0000022470 00000 n hb``f``h 0000005558 00000 n Carburetion re-jetting is crucial when pretty much any engine mod is made. Click here to view our online manual Download Product Flyer Data Specifications are subject to change at any time without prior notice. Head torque, 23.1-27.5 Ft-lb. $2,086.00. Hope this helps. It seems like I should have a good hatch even though I've hit it very little but I bet since I have the spring pressure so low on my hone combined with the hard Honda cylinder, I don't have a good cross hatch yet. With new features and better performance, the new GX engines establish themselves yet again as one of the best engines in the business. At what RPM are you taking your readings? 0000122621 00000 n 0000053235 00000 n Max. Model Series: Intake Valve Clearance: Exhaust Valve Clearance: GX640: 0.10-0.14mm ( 0.004-0.006in ) 0.18-0.22mm ( 0.007-0.009in ) GX100: 0.15 +/- 0.04mm net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Governor system Electronic Starter Recoil and electric Choke Automatic Fuel tank capacity 6.1 Liter Fuel cons. If they do not thread in by hand something's wrong. 0000026161 00000 n All Power American Steele Gentron Generator Carburetor JF390-I-04B . Change country Country. Purchase today from Northern Hydraulics or call for more info. Anyways.. even down @2000 rpm retarded timing provides 25Nm (on the new GX390 that is) (compared to the 23.4 Nm of the older versions) so fair to say almost 10% torque increase in the lower rpm band. Honda's GX390-QA2 is a lightweight engine that offers a cooler, more fuel-efficient operation. If you want to get a bit deeper into the engine you could look into moving the camshaft timing around a bit, maybe advance it a couple of degrees? 0000158625 00000 n $265.00 Add to Cart Compare Quick view ARC | sku: 6607-GX3 0000004280 00000 n Dealer. Pressure washers Commercial lawn and garden equipment Tillers/cultivators Or is it due to other unseen changes? >sJP,$Ad&L\m *23*8 0000184742 00000 n The GX 390 is quiet, smooth and vibration free. Definitely a custom camshaft would be a great help. #,:=oK|a,YuwQHD@("P[y8 C'7Z>p9 G",pPYSdAU;K`jER,fMqYfwpnAG\Ft;$E7l|3z=1~7y*~VT_tFt,5iedmu 9$Hrpk(lT|#Imf+y8n8Ye|p*c_ *Z;`;CLnAiJ[P> Question is, how much? 0000193326 00000 n 5,500 feet, plus some maybe, is getting up there. Call for more information.GCK Straight Out Flange and stub (1st picture)GCK- UP Flange with 90 bend Up (2nd picture) for clutch clearance on some carts . Any comments or suggestions? Honda sprc for the GX390K1 26.5NM @ 2500 RPM that is not with the 2:1 reduction. 0000022863 00000 n Golf Cart Kit Honda/Predator GX 390/420 You are using an out of date browser. Are you positive on that nominal bore value? The crankshaft is 3/4in, and the mounting flange is a universal standard. OLD vs NEW You can clearly see what it does to the torque curve. (F6%+_L1(/ I've rebuilding a Honda GXV390 (13hp, vert crankshaft) and need to know the rod torque and head torque values. The intake manifold nuts and bolts are torqued to 16 ft. lbs. Std Torque ( N-m ) Std Torque ( ft-lb ) Screw: 3: 1: 0.7: Screw: 5: 4: 2.9: Screw: 6: 9 : 6.5 : Bolt and nut: 5 : 5 : 3.6 : Bolt and nut: 6 : 10 : 7 : Bolt and nut: 8 : 21 : 15 : Bolt and nut: 10 : 34 : 25 : Bolt and nut: 12 : 54 : 40 : Flange bolt + nut: 5 : 5.5 : Flange bolt + nut: 6 : 12 : 9 : Flange bolt + nut: 8 : 26 : 20 : Flange bolt + nut: 10 : 39 : 29 Rod to crank pin clearance, Oil clearance is 0.0016-0.0026 " with service limit of 0.005", Crankpin standard is 1.4167" with a service limit of 1.415". The GX340 is a small four-stroke gas engine offering superior performance and reliability. OEM Honda Part No: 12391-ZE2-020. Change country. The piston seems very tight in the cylinder as well. 6 0 obj <> endobj 0000004314 00000 n So are experiencing a lack of on track performance? I put it on our schools small engine dyno and it put down 17hp 26tq at 4400rpm. This part is no longer available and has been replaced by Oregon 50-431. Does anyone have a book on these engines that you could look this up in? Hello. 0000184414 00000 n It will not waste your time. You are using an out of date browser. Best of Machinery have put this Honda GX390 Pressure Washer review & buyers guide together to give potential buyers more insight into its strengths, flaws . 0921. 0000130077 00000 n Grant, I would talk to the guys at Vegas Carts and ask them for suggestions. JavaScript is disabled. 0000002860 00000 n 351C, 351M Torque Spec. DJ-3114 GX270-GX390 Dyno 275 WLC Cam. 0000051352 00000 n SPECIFIC TORQUE VALUES (GX160) Item Thread Dia. 0000206617 00000 n Where on track are the other motors faster than you? endstream endobj 7 0 obj <> endobj 8 0 obj <> endobj 9 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/ExtGState<>>> endobj 10 0 obj <> endobj 11 0 obj <> endobj 12 0 obj <> endobj 13 0 obj <> endobj 14 0 obj [/ICCBased 37 0 R] endobj 15 0 obj [/Indexed 14 0 R 255 53 0 R] endobj 16 0 obj [/Indexed 14 0 R 255 55 0 R] endobj 17 0 obj [/Indexed 14 0 R 255 44 0 R] endobj 18 0 obj [/Indexed 14 0 R 228 42 0 R] endobj 19 0 obj [/Indexed 14 0 R 238 46 0 R] endobj 20 0 obj [/Indexed 14 0 R 255 48 0 R] endobj 21 0 obj [/Indexed 14 0 R 255 51 0 R] endobj 22 0 obj [/Indexed 14 0 R 255 57 0 R] endobj 23 0 obj [/Indexed 14 0 R 255 59 0 R] endobj 24 0 obj [/Indexed 14 0 R 255 61 0 R] endobj 25 0 obj [/Indexed 14 0 R 255 64 0 R] endobj 26 0 obj [/Indexed 14 0 R 226 66 0 R] endobj 27 0 obj [/Indexed 14 0 R 228 68 0 R] endobj 28 0 obj [/Indexed 14 0 R 255 38 0 R] endobj 29 0 obj <>stream After comparing the price of all the parts vs getting a new engine with more displacement, I decided against it for now. The only way to increase HP (a calculation) is to increase the torque, or produce the same amount of torque at a high RPM. 0000239865 00000 n 0000230870 00000 n Sorry for you spending all that time just for me. net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Starter Recoil (el. _mu+7^~. 0000132919 00000 n It's torque peak is almost 20 lbs ft! Ad on Ebay says 99 % of parts you can buy from Honda. Also, do you think I should install a new piston even though my bore measure dead on standard and my piston skirts don't look worn? Yeah, I did give you 340 specs. Max. Rewind Starter (OEM) GX160 - GX390 . This Honda small motor is built with quality components and is ready to outlast the competition. The dyno is a straight engine dyno and automatically adjusts pressure. startxref Model. my gx390 just put a arc rod and the vegas carts torque cam in it. Majority of the engines are sealed between 23.5hsp and 23.9hsp with torque of between 47 and 48nm. 0000237466 00000 n I've been told never to use an old piston, while other say it doesn't matter if the old one isn't worn. Engines: High-Torque GX390T2 LBP Mega SRP: 35,500 Category: Fishery Displacement: 389 cm (23.7 cu-in) Net Power: 15.15hp (15.36Ps) Find a dealer for this product. HAN0}N'` Pd,) ;.gZdcpj3wZ8N9RJf>3he f,g2BPL|> "GJZZEnWwgJI:Oe`L$#{Z oS,>-fbv[.A& xQOWpDhk7uM\Yfv{mP~shbxdIE:*;rt5 zw7RO&xjIrCK48 ?$'sI20K:. %PDF-1.4 % Quick Summary. Parts lookup for Honda Engines power equipment is simpler than ever. GX390 Adjustable Hub Flywheel The ARC Billet Flywheels are CNC machined from 6061 T-6 Aluminum. OEM Honda Part No: 14711-ZE3-000. Aftermarket Part No: 36-325. 0000007114 00000 n It may not display this or other websites correctly. Dry Weight 31.5 KG (69 LBS) DIMENSIONS This mower was bought new by the fellow I'm working on it for and has never been into. NM is newton Meter, the formula does not change. JavaScript is disabled. . Cam bolts 40-45 ft-lbs. 0000000916 00000 n Compression ratio rating is 8.0:1. The engine is revving to 14,000 rpm in your calculations above. in) single-cylinder air-coolled 4-stroke internal combustion small gasoline engine with horizontal shaft, manufactured by Honda Motor for general-purpose applications. I have a 3 stone hone that I am honing it with but I am deathly scared of doing it too much. CRANKCASE COVER, CRANKSHAFT, PISTON GX340GX390K1/R1/T1/U1/UT1 Engine Assembly Information PISTON CRANKSHAFT/BALANCER/PISTON EXHAUST VALVE REMOVAL/INSTALLATION . 0000005690 00000 n Straight shaft 1" x 2-31/64", 1/4" keyway, Oil Alert, Elect Start, 20A Charging, 'Auto-Idle', 'Auto-Choke'. GX270 - GX390 . Need to know what to tork head bolts to, also connecting rod tork. N\d)1u3LG 7.0 kW ( 9.4 HP ) / 3600 rpm Max. Torque values (mm) N-m kgf-m lbs-ft Crankcase cover bolt M8 x 1.25 24 2.4 18 Cylinder head bolt M8 x 1.25 24 2.4 18 Engine oil drain plug bolt M10 x 1.25 18 1.8 13 Connecting rod bolt M6 x 1.0 10 1.0 7 Rocker arm pivot bolt M8 x 1.25 (Special bolt) 24 2.4 18 0000004900 00000 n Go Kart Loop for Honda/Predator GX-270/390/420. 0000259191 00000 n HondaLawnParts.com stocks Genuine Honda Engine Parts to keep your GX390 in peak condition. <<46D8B01021851E47BE121162D4D60465>]>> You must log in or register to reply here. Thanks for your help, it is very appreciated. 349 0 obj <> endobj xref 349 31 0000000016 00000 n Some porting of the head in the exhaust port (and intake) to relieve sharp corners and smoothing of any casting flaws helps for sure. Nice. GX390 13HP Honda 1" Shaft Engine -TO $649.00 $75.00 shipping or Best Offer Ignition Coil Spark Plug F7TC Honda GX240 GX270 GX340 GX390 8/9/11/13HP Engines $14.95 Was: $16.99 New Muffler Fits Honda GX390 GENERATOR Engines 13HP $62.95 GX340 GX390 Recoil Carburetor Ignition Coil Spark Plug Air Filter For Honda 13HP $39.99 Free shipping . Honda does not provide a sequence order in which these bolts need to be torqued. 0000014064 00000 n 0000008200 00000 n A IGNITION COIL AIR GAP . xref TI_HONDA_GX100_CAM_PULLEY_R&R 2 04/08/2013 Technical Information Valve adju Valve adjusting lock nut Cam pulley 6.8 x 1.9mm HONDA GX100 CAM PULLEY sting screw Torque spec: 7.5 N-m (0.75 kgf-m, 5.4 ft lb) Exhaust rocker arm Head cover Rocker arm shaft Intake rocker arm Timing belt Cam pulley shaft Cam pulley shaft O-ring Do not reuse 0000007923 00000 n 0000006535 00000 n Workplace Enterprise Fintech China Policy Newsletters Braintrust martin 2022 Events Careers angry birds 2 promo codes 2022 reddit Pressure plate bolts 35 ft-lbs. Rewind Starter (AM) GX340 - GX620 . The way to make HP or torque gains is to improve the way the engine "breathes". The cross hatch still doesn't look smooth and consistent and I measured the cylinder and can't tell that I changed the bore at all. 0000258683 00000 n 0000001450 00000 n 0 Also I do mine in my parts washer with mineral spirits and a air drill,You may find using WD-40 may get you a quicker hatch. 0000045411 00000 n 0000026424 00000 n I have an image view of the torque specs here: https://bit.ly/3l4Zs9M 0000193663 00000 n Net Torque: 19.5 @ 2500 RPM; Crankshaft Diameter: 1" Crankshaft Length: 3-31/64" Crankshaft End Tapped Size: 7/16-20; Crankshaft Keyway Width: 1/4" JavaScript is disabled. Harmonic damper bolt 70-90 ft-lbs. Will you read my last comments on honing the cylinder and make comments/suggestions? 0000004765 00000 n Aftermarket Part No: 50-431. 0000004450 00000 n Most typical "racing" mods will shift the torque up in the rpm increasing your HP, your aim is to produce a torque curve that makes a flat 24 hp without going over your torque limit, ie extending your usable range of power. Easy with car engines not so much with I/C single cyl engines. Honda cylinders are some of the hardest I've seen so I don't believe you will get into in too quickly. I don't understand why your not getting my PM's :hammerhead: A forum community dedicated to lawn care and landscaping professionals and enthusiasts. Cylinder head bolts 90-100 ft-lbs. The original poster can confirm if those torque figures are with a reduction, but considering a gx390 usually makes about 25 Nm I would say it is. 0000050499 00000 n The stone have a spring tension adjustment and I have the spring tension as light as it will go as to not ream the cylinder out. so yeah And yes, most of that comes from the variable timing; Thanks restorob. This cam is to be used in mild modified applications. 0000206224 00000 n Another way to go about it if your looking for low end grunt is remove the Gov and go with lower gearing, you will get a lot better low end pull and without the Gov retain or gain some top end speed from the higher rpm, just depends on what you want and how you set it up. So standard keyway, mount threads and crank bolt . I found the best bang for the buck was going with the comet 780 series. 0000004945 00000 n GX390QNR. GX390 The powerful Honda GX390 is ideal for applications that include agricultural equipment, air compressors, concrete saws, self-propelled lawnmowers, pressure washers, trenchers, and a variety of construction equipment. Rocker arms 17-23 ft-lbs. Torque X RPM / 5252.1 = Horsepower. It has a bore and stroke of 88.0 mm x 64.0 mm. 0000007810 00000 n /Wt`./) Qe{c%; . 0000000016 00000 n 0000081984 00000 n 0000002385 00000 n For a better experience, please enable JavaScript in your browser before proceeding. Torque (ft-lbs) Connecting rod bolt: M7 x 1.0: 9: Cylinder head bolt: M8 x 1.25: 17: Flywheel nut (special nut) M14 x 1.5: 54: Rocker arm pivot lock nut (special nut) M6 x 0.5: 7: Rocker arm pivot bolt: M8 x 1.25: 17: Crankcase cover bolt: M8 x 1.25: 17: Muffler mounting nuts: M8 x 1.25: 17: When installing aftermarket parts use manufacturer's torque values Flywheel / flex-plate bolts 75-85 ft-lbs. 0000258893 00000 n