7800mi Service 16 Jackshaft upgrade and Driver/Shaft change 2017 Shaft/Bearing info

[Janne339]

Gears are same. So with the narrower bearing the issue is the clip in chaincase. the groove in the inner chaincase must be in further. You are correct would either need the inner chaincase or make a spacer from a old wobble bearing.

I was thinking to keep 16 jackshaft and only replace the aluminium housing (on the secondary clutch side) and the wobble bearing with a 62206 bearing or 4206 bearing because they are both 20 mm wide. 30x62x20mm. The 6206 bearing in 17 Viper is 30x62x16 mm. I'm afraid 4 mm spacer will affect lubrication of the bearing?

 

[cannondale27]

That would work! Plenty of oil up there for a bearing. Go for it.

 

[Janne339]

I'm running mcx 270 the last season with no problems so maybe new 30 mm jackshaft is overkill?

 

[cannondale27]

I'm running mcx 270 the last season with no problems so maybe new 30 mm jackshaft is overkill?

Only ones I saw fail it was due to the top gear bushing and splines getting buggered. Not going to get me to make that call though! Lot of motor you have there!

 

[cannondale27]

Nr 3 , housing, has a new partnumber on 17 Viper. Whats different from old one?
View attachment 123099
View attachment 123132

I added a pic of original brace. It looks the same. Now I wonder what they changed?

 

[Janne339]

Sidewinder chaincase

http://www.yamahapart.com/oemparts/a/yam/58628fff87a866108c9d31e5/track-drive-2

 

[Janne339]

Nr 19 in new Cat 9000. Needle bearing?

https://www.blwpartsfiche.com/

 

[Janne339]

Snowmobile Part Number: 19
2602-334 BEARING,1 X 1.125 X .9375

 

[cannondale27]

View attachment 124850

Snowmobile Part Number: 19
2602-334 BEARING,1 X 1.125 X .9375

Cool! Now they are selling the bushing separate. Is Yamaha?

 

[Alsim]

View attachment 124850

Snowmobile Part Number: 19
2602-334 BEARING,1 X 1.125 X .9375

Good news!

 

[Allan]

Cool! Now they are selling the bushing separate. Is Yamaha?

I think thats only in the 9000 . I check spec of 7000 and never seen that bushing.

 

[cannondale27]

I think thats only in the 9000 . I check spec of 7000 and never seen that bushing.

Right but I bet it is same bushing. I have paid over $20 for aftermarket.

 

[Allan]

Right but I bet it is same bushing. I have paid over $20 for aftermarket.

You could be right. there is different part # for same gear
9000 Sprocket - 21T (15 Wide) 1702-490
7000 Sprocket - 21T (13 Wide) 1702-410
Gear for 7000 # 18 http://www.arcticcatpartshouse.com/oemparts/a/arc/577e82f887a866135c9fb6fc/chain-case-assembly
Gear for 9000#18 http://www.arcticcatpartshouse.com/oemparts/a/arc/583d057687a866195c7ae830/chain-case-assembly

seams like the 9000 gear is wider, so bushing would be wider?

 

[Alsim]

Right but I bet it is same bushing. I have paid over $20 for aftermarket.

Interesting if we can change only the bushing! Who sell it?

 

[cannondale27]

Looks like Cat does and hopefully Yamaha will also.