overrevtricky Posted May 8, 2010 Report Share Posted May 8, 2010 Just finished breaking the beast in with new top-end, trued/welded crank, new gaskets.....blah blah! Shee's vibrating a bit more than before, could this be due to the truing of the crank? maybe its off a little? thanks alot as always fellas. Quote Link to comment Share on other sites More sharing options...
rdzbangshee Posted May 8, 2010 Report Share Posted May 8, 2010 Just finished breaking the beast in with new top-end, trued/welded crank, new gaskets.....blah blah! Shee's vibrating a bit more than before, could this be due to the truing of the crank? maybe its off a little? thanks alot as always fellas. i have herd that happens with stock cranks go for a nice aftermarket one . the vibration will tear up your engine spin a bearing and destroy your new rebuild. Quote Link to comment Share on other sites More sharing options...
Sandfrk33 Posted May 8, 2010 Report Share Posted May 8, 2010 Do you feel a vibration at all RPM's? Quote Link to comment Share on other sites More sharing options...
overrevtricky Posted May 8, 2010 Author Report Share Posted May 8, 2010 It doesn't do it in the power, just the normal-feeling vibration. Its the low-end that gets it. Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted May 8, 2010 Report Share Posted May 8, 2010 Double check all your motor mount bolts and look at the rubber insert in cases. Quote Link to comment Share on other sites More sharing options...
tundish2800 Posted May 8, 2010 Report Share Posted May 8, 2010 Did you put the metal shims in between the motor mounts a case? I had that same problem and it cleared it up, Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted May 8, 2010 Report Share Posted May 8, 2010 mine vibrates at idle. with some throttle the vibration mostly goes away. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted May 8, 2010 Report Share Posted May 8, 2010 They all vibrate,who trued your crank?I have had set backs with cranks that were supposidly trued,luckily I check everything.When I put iot in the v-blocks it was .006 out.Many things can happen when welding a crank,I have to put almost 140amps into it just to get it hot enouph to fuse.I have checked true with crank in bike its just not easy Quote Link to comment Share on other sites More sharing options...
live2beel Posted May 8, 2010 Report Share Posted May 8, 2010 They all vibrate,who trued your crank?I have had set backs with cranks that were supposidly trued,luckily I check everything.When I put iot in the v-blocks it was .006 out.Many things can happen when welding a crank,I have to put almost 140amps into it just to get it hot enouph to fuse.I have checked true with crank in bike its just not easy They seem to vibrate a little more when you go up in stroke size also. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted May 8, 2010 Report Share Posted May 8, 2010 first, check the simple things like carb sync and misfires. then, i would do a compression and squish check on both sides.....i chased one when i first got mine, thinkin "no way they vibrate that much. it was actually a chewed up squish in the chamber from a previous ring snag causing a compression imballance. also, make sure the flywheel is square on the crank and seated properly. Quote Link to comment Share on other sites More sharing options...
overrevtricky Posted May 9, 2010 Author Report Share Posted May 9, 2010 Took it for a good spin today, vibration sure goes away when the throttle is anywhere but idle. It's also only on the right side. I looked at each pipe to stinger connection sitting on it, and at idle its only the right side that vibs not-so-normally! Quote Link to comment Share on other sites More sharing options...
toolman Posted May 9, 2010 Report Share Posted May 9, 2010 Try loosing all of the engine mounting bolts. Start the engine for a few seconds then retighten all of the bolts. You might have something in a bind. I have done this and it makes a big difference. Quote Link to comment Share on other sites More sharing options...
overrevtricky Posted May 9, 2010 Author Report Share Posted May 9, 2010 Try loosing all of the engine mounting bolts. Start the engine for a few seconds then retighten all of the bolts. You might have something in a bind. I have done this and it makes a big difference. Hmmm, that is certainly interesting. I've got nothing to loose so I'll give her a whirl. Quote Link to comment Share on other sites More sharing options...
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