upper gear bushing

[NYTurbo]

I actually think the oil holes are making it worse, if you pop a bushing out and flatten it out usually it's worn the worst right at the holes. Again these gears only turn in reverse with no load on it.

 

[1nc 2000]

Has anyone tried the no hole bushing with an o ring on each end of the bushing
and just put grease on the shaft and bushing?
I know my 17 bushing with no holes lasted the longest on my sled. 5000 miles.

 

[ClutchMaster]

Has anyone tried the no hole bushing with an o ring on each end of the bushing
and just put grease on the shaft and bushing?
I know my 17 bushing with no holes lasted the longest on my sled. 5000 miles.

sounds like your next project

 

[1nc 2000]

Heck I'll run any test parts in there if yamaha needs some real world r n d as long as they send me the parts to run.

 

[SPM]

I like the idea of having a channel for oil distribution machined into the bushing...it sure couldn't hurt.
I am starting to wonder if after a long lake or rail bed run we should be putting our sleds in reverse and backing up a bit to rotate the top gear and get some fresh oil in there...might help.
My bushing was obviously pretty dry and chattering on the jackshaft.

View attachment 154976

I'm not seeing any lack of lubrication or rotation issues, but I do see material fatigue from uneven pressure. I wouldn't want any extra grooves or holes to reduce load bearing surface.
.02

 

[mainedrummer]

39 pages of bushing-angst and the simple answer is...... run a non-reverse gear

When the hell did the physical exertion level of riding a snowmobiling become comparable to being a couch potato?

 

[Dr. FeeLGooD]

I would like to think we should be afforded state of the art technology. I mean Virus was over $20 000. And they have been building reverse in sleds for what, 50 years?

 

[STAIN]

Its because we as the masses demanded "electric reverse"!!! When you could put the 2 stroke in reverse by pushing a button people thought pulling a lever became too darn hard!!!! Boo hoo, why do I have to actually PULL A LEVER to get reverse?
The electric shift chain case has been the biggest problem with these 4 stroke s sleds( Polaris fought their electric chain case on their FST also by the way). I am not familiar with the ski doo design, does it use a motor to actuate a traditional style reverse?
There was NOTHING wrong with pulling a lever to go in reverse! It worked every time. Who here would take a manual reverse if it meant no more upper bushing wear? I"ll raise my hand for sure!

 

[74Nitro]

Its because we as the masses demanded "electric reverse"!!! When you could put the 2 stroke in reverse by pushing a button people thought pulling a lever became too darn hard!!!! Boo hoo, why do I have to actually PULL A LEVER to get reverse?
The electric shift chain case has been the biggest problem with these 4 stroke s sleds( Polaris fought their electric chain case on their FST also by the way). I am not familiar with the ski doo design, does it use a motor to actuate a traditional style reverse?
There was NOTHING wrong with pulling a lever to go in reverse! It worked every time. Who here would take a manual reverse if it meant no more upper bushing wear? I"ll raise my hand for sure!

What does that have to do with the upper bushing? A lever would just eliminate the servo motor - not the bushing.
I don't want to go back to a lever. I hated it on the Vector and Apex and hated even more on the Nytro. Not a fan of the Doo lever either.
I like my push button reverse so much on my 19, that I find myself wondering why ATV's don't have this sweet feature yet?
I mean, I just push a little button with my left thumb and I'm backing up. I don't even have to wait for the engine to almost 'stall'.

 

[Motorhead]

What does that have to do with the upper bushing? A lever would just eliminate the servo motor - not the bushing.
I don't want to go back to a lever. I hated it on the Vector and Apex and hated even more on the Nytro. Not a fan of the Doo lever either.
I like my push button reverse so much on my 19, that I find myself wondering why ATV's don't have this sweet feature yet?
I mean, I just push a little button with my left thumb and I'm backing up. I don't even have to wait for the engine to almost 'stall'.

Yes agree with you concerning this nonsense of getting rid of the servo motor, or getting rid of reverse all together unless you are set up for nothing but racing!

I mean, I need and love my push button reverse. I have never experienced any problem associated with top gear bushing wear, so it is easy for me to say!

I had around 1400 miles on my 17 when I chose to swap out that stock 21 T for a 22T. Tune and chain slop was my reasons for doing that. At 1400 my stock 21 still had no slop when I tried to wiggle it on the shaft, but it did start showing a bit of wear from that grey coating on the bushing. The 22 with around 4.5K miles on it still looked new when I checked it this mid season. It is the cheap $23 no hole cat version! Planning for a new chain and gear this upcoming preseason,and thinking it’ll go for another 5-6 K? Will replace during next preseason maintenance even if it still looks good, because of so many having issues with that top gear bushing.

So I guess I’ve been fortunate with that top gear problem whereas others have not.
Loose chain, Tight chain, holes, no holes, too much reverse use, not enough use. Who the heck knows the real fix for those that need it?

I trailer for almost all of my rides, so I use reverse many times during my many short aggressive rides. Usually 130-190 miles on a single short day. Did I just jinx myself ??

 

[STAIN]

What does that have to do with the upper bushing? A lever would just eliminate the servo motor - not the bushing.

This chain case design was introduced so the 4 stroke could have push button reverse. Lever style is less complex---seems to equal more durable in this case.
Getting rid of the reverse altogether is not an option.
You use a lever to put every other vehicle in reverse, why does a sled need to be different? I know cars really are not "lever style" reverse but you still have to move a shift "lever"
I had no qualms with the reverse on any of my other 4 strokes, as long as the linkage was adjusted properly.

 

[74Nitro]

Yes agree with you concerning this nonsense of getting rid of the servo motor, or getting rid of reverse all together unless you are set up for nothing but racing!

I mean, I need and love my push button reverse. I have never experienced any problem associated with top gear bushing wear, so it is easy for me to say!

I had around 1400 miles on my 17 when I chose to swap out that stock 21 T for a 22T. Tune and chain slop was my reasons for doing that. At 1400 my stock 21 still had no slop when I tried to wiggle it on the shaft, but it did start showing a bit of wear from that grey coating on the bushing. The 22 with around 4.5K miles on it still looked new when I checked it this mid season. It is the cheap $23 no hole cat version! Planning for a new chain and gear this upcoming preseason,and thinking it’ll go for another 5-6 K? Will replace during next preseason maintenance even if it still looks good, because of so many having issues with that top gear bushing.

So I guess I’ve been fortunate with that top gear problem whereas others have not.
Loose chain, Tight chain, holes, no holes, too much reverse use, not enough use. Who the heck knows the real fix for those that need it?

I trailer for almost all of my rides, so I use reverse many times during my many short aggressive rides. Usually 130-190 miles on a single short day. Did I just jinx myself ??

We've all been waiting and writing about the 'real fix' for a long time. But that needs to come from Yamaha and /or Cat.

 

[74Nitro]

This chain case design was introduced so the 4 stroke could have push button reverse. Lever style is less complex---seems to equal more durable in this case.
Getting rid of the reverse altogether is not an option.
You use a lever to put every other vehicle in reverse, why does a sled need to be different? I know cars really are not "lever style" reverse but you still have to move a shift "lever"
I had no qualms with the reverse on any of my other 4 strokes, as long as the linkage was adjusted properly.

I just think that when it comes to liesure time, easier is better.
Often when one gets use to a nice feature, like a heated seat, electric start, or handle bar warmers you never want to go without those features again. Push button reverse is a feature I really like.
You could also liken it to Doo's mountain electric start feature. Sure, they start first pull when warm, but it's easier to push a button than to give the rope a tug.

 

[4strokes]

Its because we as the masses demanded "electric reverse"!!! When you could put the 2 stroke in reverse by pushing a button people thought pulling a lever became too darn hard!!!! Boo hoo, why do I have to actually PULL A LEVER to get reverse?
The electric shift chain case has been the biggest problem with these 4 stroke s sleds( Polaris fought their electric chain case on their FST also by the way). I am not familiar with the ski doo design, does it use a motor to actuate a traditional style reverse?
There was NOTHING wrong with pulling a lever to go in reverse! It worked every time. Who here would take a manual reverse if it meant no more upper bushing wear? I"ll raise my hand for sure!

I completely agree and avoid reverse even on my reliable apex and nytro. yes, I could easily live with out reverse. I do blame the push button, same reason the belt needs to be so slack. But I will also say, even the manual reverse on the doo 1200's had a very similar shaft issue that is super expensive to fix. they wear the splines into arrows with low miles and no way to improve. they also need a very slack belt or even put in reverse before starting. To this day if I need to back my apex or nytro out of a trailer etc. I put it in reverse before I start it to warm up.

 

[Farmer 73]

The chain case along with the inconsistency of the best way to fix the problem is why I'm not buying a new Winder or Viper. I was talking to my dealer, has been since 1983, about it. His comment was " how many problems has he had with customer's Apex's, Vector's, or Nytro's.....NONE! With the Viper and Winder....well we already know that answer. I will be riding my Nytro again next year, with my wife on her Vector.