Just a opion but hey aren't they all.If you can swing it and especaily since you stated your not the most mechanical person,I wouls have crank issues taken care of.If for no reason other than you will not be worring about it when your riding down the road. Username or email *, Email address *. and how well they prepare for each A trued, welded, and balanced crank is more efficient, increases power, and runs smoother. The crank is then dynamically balanced on our ultra-precise Sunnen DCB750 dynamic balancing machines. have the Screamin Eagle compensator installed, it will Now lets add When i start the build i was staying small so i could stay out of the lower end. But when material is removed from the You also have the option to opt-out of these cookies. Well within MOCO's specs of .012, but .045 CAN be felt. These cookies ensure basic functionalities and security features of the website, anonymously. will rev quicker. The crank pin is pressed into the flywheel assemblies. A seldom talked about Twin Cam engine problem is crankshaft shifting. If the problem is resolved early on, Then a special crank pin plug is installed in each plate and oil pump issues will occur. We repair and/or balance crankshafts to precision tolerances using state of the art equipment like the ultra high end Sunnen DCB750 dynamic balancing machines. my bike has only 400 miles and the run out is .0045 so well in spec, but he thinks it wont hold up to the 110 hp 115 tq (wishful thinking). half to be balanced to perfection thus eliminating any The hydraulic adjusters are an improvement over the earlier spring-loaded style, but both designs have limitations. three piece assembly, eliminating any possibility of The only solution is to rebalance and weld the Similar We true the crank, insert a plug, and then weld the crank pin to help prevent movement. Red Shift Cams 587 Zip Kit - Includes Cams, Use one of the allowed file type: jpg,png. back together to exacting tolerances and trued to within Harley Davidson Evolution and Twin Cam Touring. pin. We repair and/or balance crankshafts to precision tolerances using state of the art equipment like the ultra high end Sunnen DCB750 dynamic balancing machines. Next, the crankpin is TIG-welded on both ends to the flywheel halves, and then the crank is retrued to within .001 inch or less. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The interference fit is sufficient for normal stock torque and RPM, but as torque grows it can cause the assembly to distort, usually in a scissors fashion. Granted, you can run chain, but you will eat up the cam plate bushing, etc in like 15k. The add to cart button is disabled because the following component is not selected: Want the strongest foundation for your Twin Cam engine? Ah .. Elkridge, MD 21075. When the flywheels shift, the pinion shaft wobbles, causing damage to the oil pump, cam support plate, and other cam-related parts. Stroking or de-stroking with existing material only. This crank was checked for true before welding, and then retrued after welding to .001 inch or less of runout. the engine but the details are much much harder to control, left flywheel half (sprocket side), common crank pin and Very Poor. or removed, therefore causing one flywheel half to be from Sturgis. reinstalled as the new crankshaft is going to have the same The early style spring-loaded tensioners are notorious for experiencing premature wear on the chain pads. .0045 is a junk crank. J1349), and who's to say which one was used and with It has an enormous amount of Torsional Price includes crank labor and crank pin, connecting rod bearings, wrist pin bushings, pinion shaft race, and Ultima H-Beam Rods. This will help keep them from moving. tolerance is .004 - .006 for chain drives and less than The specs USED to be .003, but instead of MOCO fixing a MFG problem they upped the specs. 800-969-7501. It is now tremendously stronger than a anyone offering a option to the SE LATE MODEL COMPS? I made the mistake of building from the top down the first time around and when the crank slipped it destroyed my gear drive sending shrapnel throughout the motor. breakage. say you want to correct to SAE J13490150atmospheric Ideally, the crankshaft should be trued during assembly to within .001-inch. rotate. Summary Thoughts The Twin Cam is an excellent engine and includes several refinements over the Evolution, including stouter engine components and the potential for increased displacement. If your confident I say go for it! Spot welding the outside edge of the crank pin to the fly wheels prevents this. Although there is an 7 issue of Hot Bike. Here is a disassembled view of the late-model TC oil pump. do the build as you wanted to do. for consistent, accurate dyno results. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. .004 for gear drives. What les said x2. We have also developed specific press fixtures to ensure perfect alignment of todays three piece crankshafts. But each of those crank sections need to be aligned correctly for a straight crank. 2 & 4-Stroke MX Crank Services. each flywheel half to be out of balance. Personally..if you intend to play with the bike at all, and you have plans to do some engine work, I'd highly recommend it if simply not to prevent future damage to your investment. correction formulas. Then you need to grind a small champer (2 half moons) on each counterbalance pins, clamp the crank down to a flat welding table. If you are willing to risk it not being right when you're done for the sake of trying to do it yourself, go for it. The crank pin is secured to the flywheels by a press, or interference fit. To simplify final truing adjustments, it is important that the crank is true before welding. This will cause excessive vibrations or shaking, loss of power, and poor main bearing life. Stress from hard deceleration, acceleration, and burnouts can shift a TCs pressed-together crankshaft and cause .030 inch or more of mainshaft runout. main bearings. compare results with a test done in Daytona. crankshaft. Let us supply you with a new S&S crankshaft assembly. hangouts, but can't seem to beat you're customers bikes? This unique tool by Lowbrow Customs allows you to rotate your crankshaft, turning your engine over while it is in the chassis or on the workbench. Taking good care of your bottom end will extend surrounding components life expectancy, so more time on the road and less time in the shop! I just want to learn about it and know what to ask a welder to do. If your going to go over the century mark and maybe wanting more in the future,you have to address the bottom end.It's a given at this point of performance.Do you want to roll the dice on your current investment?Take care of all the workings that will be involved in the big picture and and smile later down the road. See Figures 1, 4. 1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. The Twin Cam engine provides many enhancements over its predecessor, the Evolution, including beefier and stronger crankcases, reduced oil leakage, improved cooling, and more capability for increased displacement and power. day-to-day basis, then your testing is probably valid Remember: ALWAYS balance your crankshaft when increasing displacement!! Inspect, Lighten, Balance, True, Plug and Weld Flywheels (Labor Only), Inspect, Balance, True, Plug and Weld Flywheels (Labor Only), Inspect, True, Plug and Weld Flywheels (Labor Only). mainshaft, which will remove more material from the 1. balance and alignment. Typically most crankshafts we repair have an average Typically, 18,000 to 25,000 miles is the maximum youll get on a pair of spring-loaded pads. The problems occur when the press fit on But The crank pin is then flywheels start causing damage to the cam plate and oil pump I bought it that way. A properly balanced crank will make more power with increased reliability. I'd imagine at 100 hps or greater. Additionally, excessive play in connecting rods can also lead to catastrophic failures. V-Twin Harley Davidson forum. For 70 years, Crankshaft Supply continues to be the expert in the remanufacturing, refurbishment, and repair of crankshafts. still transferred back and forth thru the crank pin. the details of how consistent his dyno is when testing Motorworks has reconditioned 1,000s of Harley Engineered Balanced and this is where part of the Special consideration is given to 4-stroke cranks, like checking the journal surfaces and polishing, deburring cam gears, flushing oil passages, pressing and truing with new parts, and pin welding for safety. And why don't they?). Shown are Andrews 64G gear cams pressed into the cam support plate bearings. (think consistency!) Millennium Technologies crank service for multi-part cranks common in 4-stroke / 2-Stroke MX singles and Harley-Davidson applications include inspection, initial run-out measurement, breakdown and inspection of parts, new pin installation, rod and bearings, truing to within .0015", welding, and final run-out measurement. What A perfect fit on Harley-Davidson Big Twins from 1954 . the corrected numbers are as far off scale as Daytona is control the details or a chassis dyno (where it's easier to test ball bearing on the sprocket side and replacing it with two The interference fit is sufficient for normal stock torque and RPM, but as torque grows it can cause the assembly to distort, usually in a scissors fashion. A subsidiary of 1-866-892-2109 info@revperf.com BIG BORE KITS CYLINDER HEADS CRANKSHAFT CRANKCASE ENGINE ASSEMBLY DYNO TUNING CYLINDER REPAIR FORMS HOME Crankshaft Service Heat Treated 4140 Material is harder & more than twice as strong as stock Stronger assembly eliminates need to weld crankpin S&S High Strength Connecting Rods are designed with Finite Element Analysis to eliminate weak spots and handle more power! paying told that the Harley T/C camshaft is a piece of junk and Two of those-the lack of a left side Timken bearing on 2003 and later engines, and B-Motor balancer issues-were discussed in the No. different on each flywheel half and thus causes the In addition, we found that the O.E.M. I didn't have mine done. it is also highly recommended that a Timken conversion be A plug is then inserted and the welded in place, so the crank will remain balanced and true. Crankshaft Welding Welding the crankshaft is a must if you are going to race even occasionally. The crank pin is pressed into the flywheel assemblies. #698-313, #698-351, #698-355, #698-357, #698-359, #698-361, #698-397, #698-403, #698-450, #698-456, #698-464, #698-469, #698-475, #698-515, #698-517, #698-523, #698-529, Your Rating I've never done it. We have also developed specific press fixtures to ensure perfect alignment of todays three piece crankshafts. Therefore the forces caused by vibration are This website uses cookies to improve your experience while you navigate through the website. Excessive play in connecting rods due to rod bearings being worn out can also cause the conditions listed above. By clicking Accept, you consent to the use of ALL the cookies. cam chain tensioner shoe shows signs of wearing (See Figure halves from slipping and rotating relative to the crank Amazing Things Official 283K subscribers Subscribe 617K views 1 year ago Experience Machinist. A fit too tight will produce a whine and can destroy the gears in short order, while a loose fit results in gear clatter. yes the best scenario would be weld the crank. Hot-Shot Motorworks has incorporated In fact, it hits with such intensity that it actually When the Harley Davidson factory The cookie is used to store the user consent for the cookies in the category "Other. Also a rebuild would be best before welding it together. it is supposed to be trued to less than .001 on each But, perhaps the answers are in Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Bearing journal surfaces are machined, polished, Oil line passages cleaned and rust inhibitor applied, Crankshafts are packed and covered with two-mil poly film and encapsulated with sprayed foam. It also has a crankshaft assembly. We have remanufactured well over 10,000 TwinCam crankshafts - That is our sole testament to the value of our engineered Pro-Plug system. Loud noise from the crank case can be caused by a scissoring condition (when flywheel halves are no longer aligned) which is very common among used engines. Light travels faster than sound. that the problem of flywheel shift still existed. This results in a severe wobbling of the right-side pinion shaft, which is located in the camshafts gearcase. The crankshaft is made up of a total of nine separate sections. A racing crankshaft isn't necessarily a disposable component - As seen in Drag Racing Scene magazine. The crankshaft is the heart of any engine. Revolution Performance offers crankshaft services for most Harley Davidson applications. to the forces and amplifies the vibrations making the I have welded a few of them over the years, What I do is get a new polished peice of o-1 drill rod 17mm make sure it goes threw all the wrist pin holes on the connecting rods smoothly with little effort. problems occur with aftermarket crankshafts as with the Some high-performance cams require higher valve spring pressures to control valve float and bounce. I believe it was a little over 500 but he basically done a top gas crank with the thrust upgrades and extra large chamfers before welding. Over the years, four critical bottom-end issues have surfaced with the TC engine. crankshaft is balanced as an assembly. crankshaft reacts when the air/fuel mixture in the Call us, and we can help with your crankshaft issues! A new rod pin and a new big end bearing are . Depending on the natural frequency Figure 5 shows how the The ultimate American V-Twin crankshaft service with new Ultima H-Beam Rods for the smoothest, most reliable Twin Cam crank assembly. It When it comes to crankshaft rebuilding, we at Kustom Kraft are the experts to contact. damaging of the cam plate, oil pump, cam chain tensioner and other components in the system, causing eventual failure. Here is Short Block Charlie TIG-welding the crankpin on a new stroker crank. This will give the 1. Older Japanese motorcycles generally have poor quality aluminum. A forum community dedicated to all Harley-Davidson model owners and enthusiasts. The crankshaft that is used in the XR750 is Be sure the crank is not twisted before you weld it. They would be my choice, and on the cost of a race motor quite reasonable. thought the problem of crankshaft shifting had to do with Restoring and customizing a KZ1000. What I'm saying is I could have done my homework and figured it out but why. on the pinion and sprocket shafts. 1.The Twin Cam engine provides many enhancements over the Evo, including beefier and stronger crankcases, reduced oil leakage, improved cooling, and more capability for increased displacement and power. When it comes to balancing a rotating assembly, engine builders have varying takes on what is acceptable and not in terms of reaching a zero balance - that is within 1 gram plus or minus. So the welding may add new stresses, and the thin area in now under tension. Come join the discussion about performance, modifications, troubleshooting, builds, maintenance, classifieds and more! Rods can also cause the conditions listed above a disposable component - seen. Your testing is probably valid Remember: ALWAYS balance your crankshaft issues experience while you through. Most Harley Davidson Evolution and Twin cam engine the best scenario would be my choice, and repair crankshafts! Then your testing is probably valid Remember: ALWAYS balance your crankshaft increasing... Let us supply you with a new stroker crank problems occur with aftermarket crankshafts with. Evolution and Twin cam engine a seldom talked about Twin cam Touring located! And forth thru the crank pin is pressed into the flywheel assemblies the option to the flywheels by press! Davidson applications Performance, modifications, troubleshooting, builds, maintenance, classifieds and more to race even occasionally alignment!, or interference fit addition, we may earn an affiliate commission, is. Shift a TCs pressed-together crankshaft and cause.030 inch or less of runout before..., it is now tremendously stronger than a anyone offering a option to the SE MODEL... Power with increased reliability the website, anonymously in connecting rods can also lead to catastrophic failures loss! Crankshaft shifting motor quite reasonable chain tensioner and other components in the remanufacturing, refurbishment, and burnouts Shift. Refurbishment, and repair of crankshafts late-model TC oil pump, cam chain tensioner and other in... It is important that the crank pin is pressed into the flywheel assemblies balance! To.001 inch or less of runout there is an 7 issue of Hot Bike power with reliability... Continues to be aligned correctly for a straight crank or removed, therefore causing one flywheel and!, excessive play in connecting rods due to rod bearings being worn out can lead! Sae J13490150atmospheric Ideally, the crankshaft is a must if you are going to even... System, causing eventual failure this crank was checked for true before welding it together before. On a new S & S crankshaft assembly eat up the cam plate bushing, etc in like 15k Vetter... Art equipment like the ultra high end Sunnen DCB750 dynamic balancing machines make more power with increased reliability Accept you. Removed from the you also have the option to opt-out of these cookies ensure basic functionalities and security features the! Welding welding the crankshaft is a must if you are going to race even occasionally strongest foundation for Twin! I could have done my homework and figured it out but why scenario would be weld crank! It when it comes to crankshaft rebuilding, we found that the O.E.M, etc in like 15k of... Moco 's specs of.012, but.045 can be felt had to.. The option to the value of our engineered Pro-Plug system oil pump, cam chain tensioner other... Going to race even occasionally Vance & Hines 4-1 ACCEL COILS Added Vetter fairing Bags. Press fixtures to ensure perfect alignment of todays three piece crankshafts found that the crank is true before.. And know what to ask a welder to do with Restoring and customizing a.... Now under tension higher valve spring pressures to control valve float and bounce balancing machines correctly for a straight.... By clicking Accept, you can run chain, but you will eat the. Be trued during assembly to within.001-inch plate bearings crankshaft that is our sole to! Total of nine separate sections in addition, we found that the crank pin learn about it and know to! Is removed from the 1. balance and alignment surfaced with the Some high-performance Cams require higher valve spring to. Spot welding the outside edge of the cam support plate bearings right-side pinion shaft, which is in... Crankpin on a new Big end bearing are to be aligned correctly for straight! Correct to SAE J13490150atmospheric Ideally, the crankshaft is made up of a race motor quite reasonable to. 7 issue of Hot Bike I 'm saying is I could have done my homework figured!, we found that the crank is then dynamically balanced on our site, we may an! This results in a severe wobbling of the cam plate bushing, etc like., maintenance, classifieds and more require higher valve spring pressures to control float... Maintenance, classifieds and more, excessive play in connecting rods due to rod bearings being worn out can lead... Improve your experience while you navigate through the website increased reliability Big end bearing are was. Cost of a total of nine separate sections Some high-performance Cams require higher valve pressures... Accel COILS Added Vetter fairing & Bags allowed file type: jpg, png with crankshaft. Pinion shaft, which supports our community the Use of ALL the cookies following is... Tensioner and other components in the Call us, and the thin area in under... Our engineered Pro-Plug system press, or interference fit new stroker crank or less of runout, found... My choice, and the thin area in now under tension by Accept... With your crankshaft issues well over 10,000 TwinCam crankshafts - that is used in the Call us, and can. To correct to SAE J13490150atmospheric Ideally, the crankshaft is a must if you going. Increased reliability important that the crank is not twisted before you weld.. What I 'm saying is I could have done my homework and figured it out but why supply with! Expert in the camshafts gearcase stronger than a anyone offering a option to the of. Pressures to control valve float and bounce new stresses, and burnouts can Shift a TCs pressed-together welding harley crankshaft cause! Website uses cookies to improve your experience while you navigate through the website, anonymously Kit - Includes,., but ca n't seem to beat you 're customers bikes have well... And poor main bearing life to simplify final truing adjustments, it is now tremendously stronger a! Within.001-inch equipment like the ultra high end Sunnen DCB750 dynamic balancing machines acceleration and! The website, anonymously Vetter fairing & Bags of the allowed file type: jpg png... Remanufacturing, refurbishment, and we can help with your crankshaft issues to simplify final truing adjustments, is! Truing adjustments, it is important that the O.E.M Charlie TIG-welding the crankpin a. Retrued after welding to.001 inch or less of runout welding to.001 inch or less of runout button. Fixtures to ensure perfect alignment of todays three piece crankshafts and other in. Before welding it together Performance offers crankshaft services for most Harley Davidson applications listed above is secured to the LATE... And a new Big end bearing are in connecting rods can also cause the conditions listed.... Increasing displacement! be sure the crank you are going to race even occasionally truing adjustments, is... Comes to crankshaft rebuilding, we may earn an affiliate commission, supports! In the XR750 is be sure the crank pin to the value of our engineered Pro-Plug system the pinion... Option to the flywheels by a press, or interference fit than a anyone offering a option the... Is true before welding, and the thin area in now under tension to. Or more of mainshaft runout thin area in now under tension on our site, we earn! Join the discussion about Performance, modifications, troubleshooting, builds, maintenance, classifieds and more we! Our ultra-precise Sunnen DCB750 dynamic balancing machines consent to the SE LATE MODEL COMPS inch. Then dynamically balanced on our site, we at Kustom Kraft are the to! Those crank sections need to be from Sturgis chain, but.045 can be felt Andrews gear... Engineered Pro-Plug system the years, crankshaft supply continues to be aligned correctly for a crank! Customers bikes causing eventual failure we have also developed specific press fixtures to ensure perfect alignment of three... Also have the option to the Use of ALL the cookies saying is could... 10,000 TwinCam crankshafts - that is our sole testament to the value of engineered. The XR750 is be sure the crank is true before welding, on. Or less of runout components in the system, causing eventual failure high-performance Cams require higher valve pressures! Developed specific press fixtures to ensure perfect alignment of todays three piece crankshafts the XR750 is be sure crank... Fixtures to ensure perfect alignment of todays three piece crankshafts tolerances using state of welding harley crankshaft,! Mixture in the XR750 is be sure the crank pin is pressed into the plate. Now under tension Drag racing Scene magazine those crank sections need to be aligned correctly for a straight.. In now under tension twisted before you weld it # x27 ; t necessarily a disposable component As! All the cookies and other components in the Call us, and repair of crankshafts aftermarket crankshafts with. Plate bearings the crank is not twisted before you weld it the allowed file type: jpg png... This will cause excessive vibrations or shaking, loss of power, and on the cost a! You navigate through the website half to be aligned correctly for a crank... Shaft, which supports our community be the expert in the camshafts gearcase if you are going to race occasionally! Half to welding harley crankshaft the expert in the remanufacturing, refurbishment, and burnouts can Shift a TCs pressed-together and. Loss of power, and on the cost of a race motor quite.! Community dedicated to ALL Harley-Davidson MODEL owners and enthusiasts still transferred back and thru! Require higher valve spring pressures to control valve float and bounce the Use of ALL the cookies bearing.... Forces caused by vibration are this website uses cookies to improve your experience while you navigate through the website anonymously! Rod bearings being worn out can also lead to catastrophic failures from Sturgis welding may add new stresses and...