banshee(911) Posted June 7, 2007 Report Share Posted June 7, 2007 ok so ive posted a bunch of times the noise in my motor but still havent got it fixed can some one help i know what its not the only thing im thinking it is is the cases worn out but not even sure if thats it this is my second set of bearings in 3 weeks and theres a lot of vibration from motor and theres a noise i can feel the kickstarter vibrate when reving the engine sounds like a rattle Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 7, 2007 Report Share Posted June 7, 2007 what bearings are going bad? I must have missed your last post. Quote Link to comment Share on other sites More sharing options...
banshee(911) Posted June 7, 2007 Author Report Share Posted June 7, 2007 what bearings are going bad? I must have missed your last post. all bearings are bad but the worse one is on the flywheel side omg you wouldnt beleive the luck ive been having when i put my new bearings on and put it all back together still the same noise rebuilt the clutch not that got it all together and bam the nut of the crank went through my side cover and the flywheel came loose so i had to get another Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 7, 2007 Report Share Posted June 7, 2007 (edited) all bearings are bad but the worse one is on the flywheel side omg you wouldnt beleive the luck ive been having when i put my new bearings on and put it all back together still the same noise rebuilt the clutch not that got it all together and bam the nut of the crank went through my side cover and the flywheel came loose so i had to get another How new is the crank? has it been trued and welded? What type of bearing are you using? Post some pics. Edited June 7, 2007 by Fouledout420 Quote Link to comment Share on other sites More sharing options...
boonman Posted June 7, 2007 Report Share Posted June 7, 2007 Sounds like the crank may be out of phase, or something not timed right. May have to put a degree wheel on it, and measure both cylinders. Quote Link to comment Share on other sites More sharing options...
banshee(911) Posted June 7, 2007 Author Report Share Posted June 7, 2007 Sounds like the crank may be out of phase, or something not timed right. May have to put a degree wheel on it, and measure both cylinders. the crank is 3 weeks old its a vitos 4 mill with stock length rods and when it started making noise i took it to the machine shop and had hotrod bearings put on it and trued and welded but tha machinist told me the crank,s center has a keyway in it the cranks still in the motor on the bike i just put 1500$ in the bike 3 weeks ago then after the break in period i went for a short ride and the next day it started making noise Quote Link to comment Share on other sites More sharing options...
banshee(911) Posted June 7, 2007 Author Report Share Posted June 7, 2007 the crank is 3 weeks old its a vitos 4 mill with stock length rods and when it started making noise i took it to the machine shop and had hotrod bearings put on it and trued and welded but tha machinist told me the crank,s center has a keyway in it the cranks still in the motor on the bike i just put 1500$ in the bike 3 weeks ago then after the break in period i went for a short ride and the next day it started making noise when it started making noise i tore it down and found sand in the crank cleand it out with brake cleaner put it back together and the noise got louder so i replaced the bearings and now it still does it with new bearings thats why i think my cases are wore outoh ya and when i took it apart i could c where the center bearings the spacer between themhad lil marks on it like side to side Quote Link to comment Share on other sites More sharing options...
BenBB Posted June 7, 2007 Report Share Posted June 7, 2007 Something's funky with your assembly dude, both the flywheel and crank nut spun? Don't get me wrong I'm not saying you're a moron, shit happens, but "bad" cases just doesn't happen magically. If I understand right you got a new 4mil crank and put it together, it made noise breaking in and when you ran it, it spit off the flywheel and crank nuts; you opened it up and found sand in the cases (how did it get in? air filter? intakes? carbs? case sealant?), rebuilt the crank and had it trued & welded, put it back together and now it rattles, right?? 1. What's different now compared to before (the last time it ran and didn't rattle)? Crank and ??? 2. What all did you take out and/or inspect when the cases were split? Tranny? Kicker gear? 3. What did you use, and how confident are you in the application, to seal the cases? 4. Did you use a torque wrench on the jugs, the head, the cases, etc.? On EVERY bolt & nut? 5. Any wierd wear on the cylinders when you took it off the second time? 6. You sure you got the crank bearing pins set right in the cases? 7. You gonna invest in a flywheel holder to torque that nut this time? 8. How confident are you in the guys that trued the crank? If it was mine I'd try to find out first where that sand came from, then try to pinpoint the noise you're hearing; is it a bearing or bushing or demonic gremlin or gear??? If you're running it and can hear it at idle, put your ear to the handle of a big screwdriver and put the other end on different places on the motor to find out where it's loudest. I seriously doubt your cases are shot, just something outta whack, and if you can swap a crank you can find the problem, even if it didn't go so well the first time... Quote Link to comment Share on other sites More sharing options...
banshee(911) Posted June 7, 2007 Author Report Share Posted June 7, 2007 Something's funky with your assembly dude, both the flywheel and crank nut spun? Don't get me wrong I'm not saying you're a moron, shit happens, but "bad" cases just doesn't happen magically. If I understand right you got a new 4mil crank and put it together, it made noise breaking in and when you ran it, it spit off the flywheel and crank nuts; you opened it up and found sand in the cases (how did it get in? air filter? intakes? carbs? case sealant?), rebuilt the crank and had it trued & welded, put it back together and now it rattles, right?? 1. What's different now compared to before (the last time it ran and didn't rattle)? Crank and ??? 2. What all did you take out and/or inspect when the cases were split? Tranny? Kicker gear? 3. What did you use, and how confident are you in the application, to seal the cases? 4. Did you use a torque wrench on the jugs, the head, the cases, etc.? On EVERY bolt & nut? 5. Any wierd wear on the cylinders when you took it off the second time? 6. You sure you got the crank bearing pins set right in the cases? 7. You gonna invest in a flywheel holder to torque that nut this time? 8. How confident are you in the guys that trued the crank? If it was mine I'd try to find out first where that sand came from, then try to pinpoint the noise you're hearing; is it a bearing or bushing or demonic gremlin or gear??? If you're running it and can hear it at idle, put your ear to the handle of a big screwdriver and put the other end on different places on the motor to find out where it's loudest. I seriously doubt your cases are shot, just something outta whack, and if you can swap a crank you can find the problem, even if it didn't go so well the first time... WEN I WENT ON MY RIDE AFTER THE BREAK IN I MET UP WITH SOME FRIENDS AND THEY WAS AHEAD OF ME THERE WAS THIS HUGE SAND CLOUD AFTER THEY PULLED OUT I WENT THROUGH IT AFTER ALL THE RIDE I GOT HOMETHERE WAS A NOISE I RODE IE ON SHORT RIDES BE-4 THIS HAPPEND AND NO NOISE BUT THERE WAS A HOLE IN MY K ADN N,S FROM THI STOCK BOW MOUNT THAT WASNT I DIDNT C .CRANK AND PISTONS RINGS GOT A NEW KICKER GEAR AND THE TRANNY LOOKED AND SHIFTED GOOD YAMABAND AND YES TORQUED EVERY THING YES ITS VERRY SHINNY ON INTAKE AND EXAUST VERRY CONFIDENT IN THE MACHINIST HE DOES ALL THE WORK FOR THE SPORT STORES AROUND HERE Quote Link to comment Share on other sites More sharing options...
BenBB Posted June 7, 2007 Report Share Posted June 7, 2007 Ok sand got in through the K&N and hosed the bearings, first failure explained. Now for the second one; crank builder is reputable so hopefully you can rule that out. Can you pinpoint the noise with the screwdriver trick? It's not the kickstarter itself is it (I know stupid question, but it is a possibility)? You did clean the wrist pin bearings after the sand happened right? Vibration still points to crank or pistons, but rattle could be anything from a bearing to clutch chatter... Quote Link to comment Share on other sites More sharing options...
banshee(911) Posted June 7, 2007 Author Report Share Posted June 7, 2007 Ok sand got in through the K&N and hosed the bearings, first failure explained. Now for the second one; crank builder is reputable so hopefully you can rule that out. Can you pinpoint the noise with the screwdriver trick? It's not the kickstarter itself is it (I know stupid question, but it is a possibility)? You did clean the wrist pin bearings after the sand happened right? Vibration still points to crank or pistons, but rattle could be anything from a bearing to clutch chatter... INSTALLED NEW WRIST PINS CAUSE WHEN I GOT THE CRANK I GOT A SET AND WHEN I GOT THE PISTONS GOT A SET ALSO AND AS FOR THE KICKSTARTER NOT SURE IF THATS ITIM GONNA GO N C WITH THE SCREWDRIVER Quote Link to comment Share on other sites More sharing options...
banshee(911) Posted June 7, 2007 Author Report Share Posted June 7, 2007 well just took it to the shop and they said it was piston slap there gonna pull the side cover of to c if theres annything wrong in there so now im with ut a wheeler for a couple days but it will b fixed right Quote Link to comment Share on other sites More sharing options...
BenBB Posted June 7, 2007 Report Share Posted June 7, 2007 well just took it to the shop and they said it was piston slap there gonna pull the side cover of to c if theres annything wrong in there so now im with ut a wheeler for a couple days but it will b fixed right Hope so man, good luck. Quote Link to comment Share on other sites More sharing options...
banshee(911) Posted April 18, 2008 Author Report Share Posted April 18, 2008 Hope so man, good luck. well im not sure but the sounds back after i put it in the shop in june i got it back in october 1700.00 rode it twice and yep the sounds back really gettin upset with this money pit HELP PLEASE Quote Link to comment Share on other sites More sharing options...
Animalman294 Posted April 19, 2008 Report Share Posted April 19, 2008 Did you say 28cc domes, or did you mean 18cc domes with those cubby cylendar's...........? :shrug: Quote Link to comment Share on other sites More sharing options...
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