Available for other motors, too! All Power American Steele Gentron Generator Carburetor JF390-I-04B . 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". Other than what the dyno has said, are there any issues? 0000130930 00000 n thing pulls like a mule. I know the GX390 that i have is from an old pressure washer, ill have to grab the model and see. 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. Compression ratio rating is 8.0:1. 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" 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: . OK, Specs. CRANKCASE COVER, CRANKSHAFT, PISTON GX340GX390K1/R1/T1/U1/UT1 Engine Assembly Information PISTON CRANKSHAFT/BALANCER/PISTON EXHAUST VALVE REMOVAL/INSTALLATION . 0000004757 00000 n Pressure plate bolts 35 ft-lbs. Nice. The dyno is a straight engine dyno and automatically adjusts pressure. %%EOF 0000026719 00000 n .Pm]T1 0000003812 00000 n $2,147.00. Cam thrust plate bolts 8-10 ft-lbs. It may not display this or other websites correctly. JavaScript is disabled. 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 Upon dissassembly, I measured the bore at 3.465-3.466 from best to worst in the cylinder. 0000158970 00000 n 0000121819 00000 n 0000237466 00000 n I have an image view of the torque specs here: https://bit.ly/3l4Zs9M Carburetion re-jetting is crucial when pretty much any engine mod is made. . Insert the thickness gauge of proper thickness between the ignition coil and flywheel. 0000006412 00000 n Compare up to 3 models 0000004450 00000 n Best of Machinery have put this Honda GX390 Pressure Washer review & buyers guide together to give potential buyers more insight into its strengths, flaws . From spring 2010 onwards, Honda producing the updated version of GX390 engines with larger displacement. This Honda small motor is built with quality components and is ready to outlast the competition. Does anyone have a book on these engines that you could look this up in? _mu+7^~. Would not recommend doing that. Click here to view our online manual Download Product Flyer Data Specifications are subject to change at any time without prior notice. 0000122621 00000 n 0000082233 00000 n Are you positive on that nominal bore value? I've rebuilding a Honda GXV390 (13hp, vert crankshaft) and need to know the rod torque and head torque values. at cont. 0000004585 00000 n Go Kart Loop for Honda/Predator GX-270/390/420. The crankshaft is 3/4in, and the mounting flange is a universal standard. 0000053235 00000 n The better it can breathe, the more power you get. Yeah, I did give you 340 specs. Blew connecting rod, broke bottom of piston. It must be VERY hard. 0000239865 00000 n A IGNITION COIL AIR GAP . Max. 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. 0000003565 00000 n 0000126421 00000 n HWn7}D+ &NnEENR{=3$u ! 0000004360 00000 n Thanks newz7151. 0000026424 00000 n The intake manifold nuts and bolts are torqued to 16 ft. lbs. 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. I've been told never to use an old piston, while other say it doesn't matter if the old one isn't worn. 35. (F6%+_L1(/ xb``pc``d```~ Honda specs, its something close to that from memory. JavaScript is disabled. This mower was bought new by the fellow I'm working on it for and has never been into. It weighs 5.40 lbs. Purchase now to take advantage of our free shipping and quick turnaround time. If they do not thread in by hand something's wrong. 0000004280 00000 n GX390. 0000019777 00000 n Hello. Cylinder head bolts 90-100 ft-lbs. The main feature of this design is the steel crankshaft hub that allows for timing changes at 2 increments. 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 Aftermarket Part No: 50-431. 0000003372 00000 n 0000050499 00000 n . 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. Denver is above 5,000 feet. 0000051352 00000 n Golf Cart Kit Honda . in) single-cylinder air-coolled 4-stroke internal combustion small gasoline engine with horizontal shaft, manufactured by Honda Motor for general-purpose applications. GX270 - GX390 . net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Starter Recoil (el. Change country Country. 0000004675 00000 n 0000048201 00000 n Portable hydraulic power units, stump grinders, generators, trash pumps, pressure washers and small specialized farm equipment tasks are easily handled by the Honda GX390. So standard keyway, mount threads and crank bolt . This online declaration honda gx390 engine torque specs can be one of the options to accompany you similar to having further time. %PDF-1.4 % start optional) Fuel tank capacity 6.1 Liter Fuel cons. 0000026746 00000 n For a better experience, please enable JavaScript in your browser before proceeding. hb``f``h So are experiencing a lack of on track performance? Intake manifold bolts 23-25 ft-lbs. This part is no longer available and has been replaced by Oregon 50-431. Thanks restorob. 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. For a better experience, please enable JavaScript in your browser before proceeding. Straight shaft 1" x 2-31/64", 1/4" keyway, Elect Start, 10A Charge, Oil Alert. Any comments or suggestions? <<46D8B01021851E47BE121162D4D60465>]>> 0000081984 00000 n Will you read my last comments on honing the cylinder and make comments/suggestions? The GX390 features more power, quieter performance, lower fuel consumption, and lower emissions than the previous version. 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? Need to know what to tork head bolts to, also connecting rod tork. 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 . 0000004855 00000 n my gx390 just put a arc rod and the vegas carts torque cam in it. 0000004810 00000 n Pressure washers Commercial lawn and garden equipment Tillers/cultivators 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 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. Nominal bore, Standard is 3.228" with a service limit of 3.235". _*lx#KO=\Q uBMxlV 0000003170 00000 n , Because the 340 and 390 use the same with the exception of the bore which I forgot about. >sJP,$Ad&L\m *23*8 %PDF-1.4 % 0000008401 00000 n Where on track are the other motors faster than you? Quick Summary. Engine has no Honda numbers. Rewind Starter Spring (AM) GX340 - GXV620 . 0000004900 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. Honda sprc for the GX390K1 26.5NM @ 2500 RPM that is not with the 2:1 reduction. We run almost standard 390cc Honda engines with 2mm skimmed heads and advancing the timing key by 2mm. SPECIFIC TORQUE VALUES (GX160) Item Thread Dia. 0000124389 00000 n This is the official service website for Honda, Power Products, Marine, General Purpose Engine & DC Power unit, GX390. 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. lb) of torque at 2,500 rpm. It has a bore and stroke of 88.0 mm x 64.0 mm. He never mentioned any RPM numbers. 0000004720 00000 n 0000124013 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? N\d)1u3LG 0000258893 00000 n start optional) Fuel tank capacity 6.1 Liter Fuel cons. 0000206617 00000 n 0000001756 00000 n You must log in or register to reply here. 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. 0000007114 00000 n Mass production engines may vary from this value. 0000001306 00000 n GX390QNR. PWP_3bJJes6DMh442@58 S#i7F00@8lp&@8kZi-t' 3F endstream endobj 353 0 obj <>stream 0921. Fastener Type Torque Spec Main cap bolts 95-105 ft-lbs Connecting rod bolts 40-45 ft-lbs. OEM Honda Part No: 12391-ZE2-020. so yeah And yes, most of that comes from the variable timing; 0000014064 00000 n 0000230870 00000 n Honda Engines GX390 Exploded View parts lookup by model. 0000158625 00000 n Enter your model number in the search box above or just choose from the list below. This part is no longer available and has been replaced by Oregon 36-325. 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 GX390 Adjustable Hub Flywheel The ARC Billet Flywheels are CNC machined from 6061 T-6 Aluminum. Pd,) ;.gZdcpj3wZ8N9RJf>3he f,g2BPL|> 0000002049 00000 n 794572 Carburetor Briggs & Stratton Replaces # 793224 791888 792358 792171 Assy 52.98 19.99. hmm. http://www.vegascarts.com/product-p/gp966comp.htm, http://www.vegascarts.com/category-s/1822.htm. Flywheel / flex-plate bolts 75-85 ft-lbs. at cont. What's your opinion? 0000002860 00000 n 0000193663 00000 n It will not waste your time. 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 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 Straight shaft 1" x 2-31/64", 1/4" keyway, Oil Alert, Elect Start, 20A Charging, 'Auto-Idle', 'Auto-Choke'. 0921. 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. Hope some one can help. This cam is to be used in mild modified applications. 0000238238 00000 n Price: $10.99. Loosen the ignition coil mounting bolts. 0000258683 00000 n MENU > General Purpose Engine & DC Power unit > GX390 > Owner's Manual Please select your country. My bore is dead on then. Hope this helps. You are using an out of date browser. 0000184414 00000 n Flange and stub are welded. Honda New GX390 Engine Standard 1" Crank, Electric Start, Oil Alert Brand: Honda 30 ratings $1,49900 See more About this item Fuel: Unleaded 86 octane or higher Governor System: Centrifugal Mass Type Air cleaner: Dual element Oil Capacity: 1.16 US qt (1.1 L) Fuel Tank Capacity: 6.4 U.S. qts (6.1 liters) Buy it with 349 0 obj <> endobj xref 349 31 0000000016 00000 n 0000007923 00000 n Also curious as to the rod to crank pin clearance. 0000008035 00000 n Official specs and features for the Honda GX340 small engine. NM is newton Meter, the formula does not change. It will require an upgraded spring package, billet rod, and billet flywheel. 1 5/16" muffler fits. Straight shaft 1" x 2-31/64", 1/4" keyway, Elect Start, 18A Charge, Oil Alert. *The power rating of the engine indicated in this document is the net power output tested on a production engine for the engine model and measured in accordance with SAE J1349 at 3,600 rpm (net power) and at 2,500 rpm (max net torque). For a better experience, please enable JavaScript in your browser before proceeding. "GJZZEnWwgJI:Oe`L$#{Z oS,>-fbv[.A& xQOWpDhk7uM\Yfv{mP~shbxdIE:*;rt5 zw7RO&xjIrCK48 ?$'sI20K:. Definitely a custom camshaft would be a great help. When this is the case, it is best practice to start from the center and alternate bolts/nuts while moving outward. 7.0 kW ( 9.4 HP ) / 3600 rpm Max. 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. I truly appreciate it. Honda's GX390-QA2 is a lightweight engine that offers a cooler, more fuel-efficient operation. 0000236258 00000 n I did it a couple of times for about 30-45 seconds, then cleaned it out with a cloth. Halve the RPM, I'll bet they are running a 2:1 reduction wet clutch. 0000010327 00000 n 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. Workplace Enterprise Fintech China Policy Newsletters Braintrust martin 2022 Events Careers angry birds 2 promo codes 2022 reddit Honda does not provide a sequence order in which these bolts need to be torqued. Rewind Starter (OEM) GX160 - GX390 . Cam bolts 40-45 ft-lbs. Looks like an increase of 1.5 Newton meters just with that? 0000004540 00000 n General information Dimensions and Weight Cylinder Block and Head In this video, we replace the cylinder head on a Honda GX390 engine on a 4000 PSI pressure washer. 5,500 feet, plus some maybe, is getting up there. 0000000016 00000 n Dealer. I found the best bang for the buck was going with the comet 780 series. Complete exploded views of all the major manufacturers. 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. 0000001450 00000 n at cont. 0000001872 00000 n It looks just like a Honda GX390, 13 hp. 0000258383 00000 n net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Starter Recoil (el. 0000193326 00000 n 78 0 obj <>stream 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. 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. My point is your calculating his power with engine rpm and torque at the output shaft after the 2:1. World Formula premier clutch with motorbike type chain. Xc6 8zB\@L 4DP$|o;\p>`t; bb $4ceXc[G0.htY u^, B,iT$D`XZF/@ ^ca300 3K Engines according to our dyno are not allowed to produce more than 24hsp and 49nm of torque. I don't understand why your not getting my PM's :hammerhead: A forum community dedicated to lawn care and landscaping professionals and enthusiasts. Somebody walked off with my 390 manual. 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 HondaLawnParts.com stocks Genuine Honda Engine Parts to keep your GX390 in peak condition. 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. Head torque, 23.1-27.5 Ft-lb. Thanks for your help, it is very appreciated. 0000002306 00000 n 6 0 obj <> endobj After comparing the price of all the parts vs getting a new engine with more displacement, I decided against it for now. Oil Drain Valve (AM) Honda Oil (OEM) 10W30 / 5W30 . Thanks for any help. 0000130077 00000 n Intake Valve. 0000002385 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. 0000052738 00000 n trailer <<76564F700D2346119EDF20DC67F08D00>]/Prev 90097/XRefStm 1123>> startxref 0 %%EOF 379 0 obj <>stream 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. Majority of the engines are sealed between 23.5hsp and 23.9hsp with torque of between 47 and 48nm. Down side with small ports is you kill upper rpm power. Hondabond 4 (OEM) Liquid Gasket . Torque X RPM / 5252.1 = Horsepower. . DJ-3114 GX270-GX390 Dyno 275 WLC Cam. It is a 389cc, 11.7 HP and 3600 RPM. 0000005558 00000 n I don't know what happened but can you post the message here instead? 0000002883 00000 n Combustion Cleaner (OEM) 385g . 0000235492 00000 n Absolutely! 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? 0000239426 00000 n 0000012128 00000 n Max. It may not display this or other websites correctly. 0000004630 00000 n Golf Cart Kit Honda/Predator GX 390/420 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 Front cover bolts 12-15 ft-lbs. I have a 3 stone hone that I am honing it with but I am deathly scared of doing it too much. You are using an out of date browser. Dry Weight 31.5 KG (69 LBS) DIMENSIONS 0000022470 00000 n 0000259191 00000 n 0000022863 00000 n Harmonic damper bolt 70-90 ft-lbs. Features Specifications Please select a model from the drop-down (s) below to view the specifications. 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 . 794572 Briggs & Stratton OEM 793224 791888 699109 698445 31E777 Carburetor Assy 69.98 25.95. 0000184742 00000 n I guess I need to hone it more, I just don't want to "bore" the cylinder any with the hone. 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. give a positive response me, the e-book will unquestionably sky you additional issue to read. $265.00 Add to Cart Compare Quick view ARC | sku: 6607-GX3 The only way to increase HP (a calculation) is to increase the torque, or produce the same amount of torque at a high RPM. 0000004945 00000 n 351C, 351M Torque Spec. Easy with car engines not so much with I/C single cyl engines. 0000005690 00000 n 0000233851 00000 n The engine had a failed exhaust stud and a blown head-gasket (one of the 4 cylinder head. The GX 390 is quiet, smooth and vibration free. 0000015765 00000 n Thanks so much for your help. 0000017780 00000 n Ad on Ebay says 99 % of parts you can buy from Honda. 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? 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 Mass production engines may vary from this value.Actual power . At what RPM are you taking your readings? 0000042345 00000 n Purchase today from Northern Hydraulics or call for more info. 0000008105 00000 n ?P9{J?9.qZ{7q#vgmT& )H U5q(u6LFi8 Maybe someone from Denver CO can jump in? It is a slip together kit that you weld. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! 0000048973 00000 n Ultimate Karting. 0000001123 00000 n Price $80.00. Another way to go about it if your looking for low end grunt is remove the Gov and go with lower gearing, you will get a lot better low end pull and without the Gov retain or gain some top end speed from the higher rpm, just depends on what you want and how you set it up. ft) Recheck valve clearance after tightening the rocker arm pivot lock nut. OEM Honda Part No: 14711-ZE3-000. 0000007810 00000 n I bet my bore value is dead on since it only varies .001" over the entire cylinder. ,q G '7 HMj0Oiw#t,zMX M;:8*8~Nn}:$J:{F!-a&. 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. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. #,:=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> 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 $25 of items shipped by Amazon Or fastest delivery Wed, Oct 26 0000239640 00000 n Sorry for you spending all that time just for me. The piston seems very tight in the cylinder as well. Thanks so much for your help. 0000000916 00000 n JavaScript is disabled. Hub. Rocker arms 17-23 ft-lbs. TI_HONDA_GX100_CAM_PULLEY_R&R 2 04/08/2013 Technical Information Valve adju Valve adjusting lock nut Cam pulley 6.8 x 1.9mm HONDA GX100 CAM PULLEY sting screw Torque spec: 7.5 N-m (0.75 kgf-m, 5.4 ft lb) Exhaust rocker arm Head cover Rocker arm shaft Intake rocker arm Timing belt Cam pulley shaft Cam pulley shaft O-ring Do not reuse net torque). 0000259411 00000 n Mass production engines may vary from this value. xref iGX390QZNR. Is it possible to increase torque output at a given RPM range (1800-2200) doing any performance part installations for the honda gx390? Change country. Ive never seen bolts included in the box of a predator. The GX340 is a small four-stroke gas engine offering superior performance and reliability. 0000004315 00000 n The cost was just too much for me to justify though. Honda cylinders are some of the hardest I've seen so I don't believe you will get into in too quickly. 0000008200 00000 n 0000132919 00000 n Model. 0 Rewind Starter (AM) GX340 - GX620 . Rewind Starter Handle (OEM) All Engines . as follows; Rod torque, 8.7-11.5 Ft-lb. This Honda engine is a 4-stroke OHC single cylinder, which is a 88 X 64 stroke. Still, without the RPM numbers, your information, as good as it is, isn't of much value. The way to make HP or torque gains is to improve the way the engine "breathes". 0000206224 00000 n I've seen this done before at the machine shop so I did it the same: Put a light coat of transmission fluid in the cylinder for lubrication then run the hone up and down gently while twisting it with a conventional drill. {5#rssb~/Z%>w%>JD]G/bzWRLb?9\M]S7'F6$kUjERiz3A)sxZ>~f Grant, I would talk to the guys at Vegas Carts and ask them for suggestions. All I want to do is put a good cross hatch in it for the rings to "bite". /Wt`./) Qe{c%; The engine is revving to 14,000 rpm in your calculations above. HAN0}N'` OLD vs NEW You can clearly see what it does to the torque curve.