Broken jackshaft bearing.......Y??

[apex55]

I'd use a low temp grease.

 

[ranger1]

ecopter said that the driveshafts were prone to breakage & not the jackshaft at 10,000 miles. I did a search to try to find out for sure because if I am going to have to take the jackshaft out I want to be sure which one it is because if it is the jackshaft it will have to be replaced since I am in there, if it isn't, I will save a few hundred bucks,lol!!!
Oh ya, couldn't find ant results in my search.

 

[thor452]

I have a friend who found out his jack shaft was bent and was causing his machine to eat jack shaft berrings for what its worth when you get it back together run it on a stand and watch the secondary for a wobble.

 

[ranger1]

I have a friend who found out his jack shaft was bent and was causing his machine to eat jack shaft berrings for what its worth when you get it back together run it on a stand and watch the secondary for a wobble.

It doesn't appear to be bent, I checked it before I took the clutch off to check the bearing, no wobble.

 

[thor452]

did you run it up on a stand? that was how we seen his. with belt on have a friend spin the track with the throttle and you watch from the side. just what we found and someting to look for.

 

[ranger1]

did you run it up on a stand? that was how we seen his. with belt on have a friend spin the track with the throttle and you watch from the side. just what we found and someting to look for.

Yes, I ran it on the track stand, looked straight, no wobble. Tried search on here to see if the jackshafts are prone to breakage but can't find anything, thought I read that on here somewhere before though.

 

[thor452]

that was the drive shaft

 

[ranger1]

that was the drive shaft

Oh ok, so I just need the bearing then, no new jackshaft perfect!! Do you think I should replace the seals & the chaincase bearing also?

 

[thor452]

at 6000 id say your early but if you have the chain case appart the it is easy and pretty cheap

 

[teamyamaha]

I suggust replacing the jackshaft bearing with oem, and replace chain case fluid. Go find some snow and enjoy!

 

[black knight]

if this bearing was changed before I'm wondering by accident if the inner race threaded bushing was tightened before the chain case nut on the other end of the shaft.
In return not setting the shaft alignment correctly, pulling on the bearing behind the secondary on the jackshaft and eventually breaking the inner race of that bearing????
Always tighten the chain case side jackshaft nut first then the secondary lock bushing.
I would change the bearings in the chain case you will have it apart anyway.

Cheers

 

[ranger1]

if this bearing was changed before I'm wondering by accident if the inner race threaded bushing was tightened before the chain case nut on the other end of the shaft.
In return not setting the shaft alignment correctly, pulling on the bearing behind the secondary on the jackshaft and eventually breaking the inner race of that bearing????
Always tighten the chain case side jackshaft nut first then the secondary lock bushing.
I would change the bearings in the chain case you will have it apart anyway.

Cheers

Thats a very good point & I think your on to something because when i first got the sled & was checking things out I noticed the secondary clutch wouldn't slide on the jackshaft, had no free play at all!! Had to take out an outer shim between the bolt & the secondary!!!
hmmmmm, wait a second, in that case I probably would have too much clutch free play because there would be more shaft on the clutch side.

 

[ecopter]

Yes, sorry about the confusion, I meant the drive shafts are prone to breaking, not the jackshafts. It was in response to you not having to spend so much at the dealer.

 

[ranger1]

Yes, sorry about the confusion, I meant the drive shafts are prone to breaking, not the jackshafts. It was in response to you not having to spend so much at the dealer.

No problem at all & thank you for your help as you saved me exactly $317 + tax at the dealer because that is the price of a new jackshaft which I will not be buying thanks to your info, lol!

 

[ranger1]

One last question then I can put this post to rest. The dealer does not have the bearing in stock, has to order it. Is there any other parts I will need to order to complete this job, o-rings, seals or will the existing ones be fine? Is the bearing on the chaincase side easy to change since the jackshaft is coming out?
Thanks everyone for all your help!
Pretty soon I will be up & ing again, wuhoo!!