The rubber boot on my Yamaha big bear came off . I loosend the o rings and after loosing the oil, I tried to refasten the O rings . Well I tried and tried but cannot tighten this boot . It continues to fall off, I'm extreamly frustrated as the boot seems too big for the shaft ...any help much appreciated ! thanks , Jack

 

Is it one of the new Bigbear's with IRS or if not does the boot go between the transmission and the swingarm? Is it held on with a clamp on one end and a spring on the other?

 

It is a rubber boot that is actually held on by to C O rigs and it looks like a very simple fix but I was wondering if anyone else has had to try this ? Looks so easy but is not staying in place ... I will give you a lik to a site that shows the boot ...the boot is #14 Any tips would be extreamly appreciated
ALBA ACTION SPORTS' 2002 Yamaha ATV BIG BEAR 400 4X4 YFM400FP (5FUA) Parts List

 

There should not be any oil contained by that boot, on my Kodiak this area is completely dry, it's just a dust boot. You have a bad transmission output shaft seal (see #13, which appears twice in the diagram because the same seal is used for both the front (bottom of the picture) and rear (top one pictured) outputs - http://partsfinder.onlinemicrofiche....=13&A=239&B=19), the boot slips off because it has oil on it, when did you last check your oil level?

 

I checked it recently and it ran well before this happend. But it makes sence because I checked a friends Big Bear older quad andthe boot was dried and actually cracked . I wondered about it then ...well I guess I should take it to a certified dealer , what do you think it may cost? Thank you so much for your advice any little bit helps .

 

The seal is pretty cheap, even if the bearing needs to be replaced it won't cost that much to buy, a bad bearing or too much oil will cause the seal to blow). On that site you posted the bearing is $40 and the seal is $6. What's gonna kill you is the labour, I believe the entire gearbox needs to be split open, meaning your engine/gearbox needs to come out of the quad, I just looked again and it's hard to tell from the diagram but the seal alone may be replaceable without removing/opening the gearbox, the only way to know for sure is to have a dealer look at it.

 

Thanks a lot for your help ! Learned a bunch , talked to a dealer machanic and he explained the same to me , said about 2 hour job so m looking at around $300.00 He said the Yoke may need relacment too ... Thanks again , Jack