| Author | Message | ||
     Kickstand76 |
OK all you nocturnal grease monkeys, riddle me this: drive belt flies off @ 80mph,$200.00 later got new one on. double-checked install. everything looked good, belt has proper clearance 360 degrees(by the book maintenance). at low speeds or when slowing to stop or on city streets humming can be heard and vibration can be felt in l/s rider peg. approx miles since new belt including test ride. 5-7. sprocket, idler damage? nothing appeared to be warped. | ||
| Nillaice |
is the belt installed in the right direction? you should be able to read the part # right side up when standing next to the left side of the bike. ... or try flipping it around so that it is installed in the 'wrong' direction. does it make teh same noise when rolling backwards? try rolling it backwards 20 feet, and listen for the belt teeth rubbing on the lip of the pulleys. are your bearings going bad? you should be able to rotate the inner race smoothly with your fingers(when the wheel is removed) | ||
| Kickstand76 |
it could be the bearings. i dont recall hearing the noise and definitely dont remember feeling it before belt replacement. back to garage tomorrow. but will look into it. thanks | ||
| Nillaice |
another thing to check is the output shaft (but i doubt it) give it a spin for shits and giggles, while you've got the tire/belt removed. | ||
| Zac4mac |
Buell belts run VERY tight by design. I have a little over 28k miles and no snapped belt. New belts tend to chirp a little, mine did the first 10k miles at ~22 mph. You can try the Free Spirits tensioner, but I and others think it's snake-oil. Zack | ||
| Juniorkirk |
It's the tensioner My bike did the exact same thing when i replaces my belt. All you need to do is tighten up that bolt that holds the tensioner in and the vibration and noise will go away. With it loose, it is able to have a little play and at high speeds it gets to shaking really bad, and since that tensioner is attached to the left rearset, you feel ALL of it in your foot. I was scared to death on my first ride after putting the new belt on and my left foot was shaking to death and it felt like something was going to fall off. Had no idea what it was until i got back and looked at it and made sure everything was nice and tight, and i found that bolt was loose. | ||
| Kickstand76 |
well, to better describe it, it's an intermittent humming. i say intermittent since wind, eng/exhuast noise may be overwhelming it. it goes on for several seconds and ends with the peg vibration. headed to the garage soon. donuts and coffee. MMM fat pills. will take all advice into consideration. thanks again. | ||
| Kickstand76 |
donuts, coffee mmm. Nillaice, rolled it backwards into the garage-lo' and behold- somethings rubbing. can't duplicate sound rolling fwd. | ||
| Lampo |
That will go away after the belt 'wears in' - don't worry just ride it. The tension is greater with a new belt and that is the cause. Once you use it some the belt will stretch a little and the humming and low frequency vibration will disappear. Sometimes it takes a few hundred miles depends on how you use it  You can see the tension difference between a new and old belt when you go to install the rear axle and line it up with the swingarm - it's pretty obvious. I've notice this several times when you first ride a brand new 1125, or replace a belt on one. Same reason for the noise when rolling it backward.... (Message edited by Lampo on March 04, 2012) | ||
| Kickstand76 |
belt is off, about to put it on the 'wrong' way. 0 for 2. | ||
| Kickstand76 |
the only reason im worried now is that upon closer inspection while turning wheel backward the belt actually rolls off track so to speak. it moves off the left of idler pulley. and rubs on peg mount bracket. maybe installing belt 'wrong' way will keep it against drive sprocket wall.  | ||
| Kickstand76 |
belt is on, test ride felt good. heard slight humming but felt no vibration. gonna roll with it. Thanks Fellas. Out. | ||
| Lampo |
FWIW the writing on the belt should be right side up as you are looking at it from the left side of the bike. If it's upside down you have it on 'backward'. Not unusual for it to track off to the left a little (looking at it from the rear) when the wheel is spun in reverse | ||
| Syonyk |
I've definitely noticed a humming around 25-30mph with a brand new belt. It does go away after a while. | ||
| Kickstand76 |
well, shit! i should've bought a cbr1000. | ||
| Syonyk |
Huh? And deal with chain maintenance? Make sure the tensioner is bolted on tightly, and the humming should go away in a hundred miles or so. | ||
| Kickstand76 |
everything's tip top. next: spark plugs, and k&n filter. | ||
| Nillaice |
if your gonna start turning japanese, ya might as well get a gixxer one million | ||
| Gemini |
Just got a new belt and have same noise. 27 and 13 mph on decelerated i get a light hum. When rolling backwards, it will rub the inside edge of the outside idler support bracket. I have been over every inch if the belt system and every looks good. Even tried placing whims to try and change tensioner angle a little. Conclusion, don't worry about it. It ain't broke. The belt system is designed to track belt towards centerline because there is no outside lip on rear pulley. If the alignment was nuetral, the belt would be easier to slip off the rear pulley. When in decel and pushing bike backwards, belt travel tracks to out side. I bet most of our bikes made some noise when new but considered it normal fir a new bike. Belt gets relaxed, noise goes away. Belt breaks. New belt with "new " noise. | ||
| 1125rcya |
Did you make sure the pully/peg bracket is torqued to spec? At first I didn't tighten my bracket up all the way and got a little vibration while spinning it by hand..then I tightened all main drive train to "specks" ! I may be lucky that I don't have the same issues as you, tho when I first bought my bike I did have humming noise's as you speak of. Try and loosen all bolts then take everything to torque specs! (harbor fright has a torque ratchet on sale for 9.99 here anyway) |
