Gear Reduction Shaft Question

[Snowmobileaddict]

It is my understanding that one of the fundamental differences in our 4 stroke genesis engine to other 2-stroke snowmobile engines is the design of the crank shaft bearings (plain bearings vs. roller bearings.

I noticed that the gear reduction shaft is supported by 2 large roller bearings. Can anyone comment on the longevity of these roller bearings? Also, are these bearings lubricated by the engine oiling system? I'm not having any issues with my gear reduction shaft, just wondering about the things mentioned above.

 

[vx700xtc]

yes, they are lubed by the engine oil

 

[kinger]

I dont think I would say the 'fundamental' difference is the bearings, I would say the number of strokes, a overhead valve system, and dry sump oiling system before the bearings.

The gear reduction is lubricated by the engine oil.

Never heard of a failure of the bearings high HP guys have busted the gear drive itself but they were pushing crazy power.

 

[Snowmobileaddict]

Thanks for the info,

Kinger, I never said that plain bearings are the fundamental difference. There's a helluva lot more going into the genesis 4S engine than some different crank bearings. In my post above, I said, and I think you agree, the bearing design is one of the fundamental differences between 4S and 2S snowmobile engine.

 

[rxrider]

The Genesis 4stroke has journal bearings between the crank and the block, between the crank and the connection rods and between the con.rod and the piston. All other internal bearings are roller bearings all bearings are oiled by the engine oil.

There's an Apex still running, it has more than 82000 kilometers or 51000 miles on the motor.

 

[APEX 06]

The Genesis 4stroke has journal bearings between the crank and the block, between the crank and the connection rods and between the con.rod and the piston. All other internal bearings are roller bearings all bearings are oiled by the engine oil.

There's an Apex still running, it has more than 82000 kilometers or 51000 miles on the motor.

Must not have a wife or a job to get those miles. Its going to take me 40 years to get that.lol

 

[rxrider]

More than I will ride in my lifetime LOL
A forgiving wife or no wife at all to ride that mileage in such a short time.

 

[langow]

There's an Apex still running, it has more than 82000 kilometers or 51000 miles on the motor.

Wife or no wife, there aint enough winter in this area to make that happen in a lifetime!

 

[Jona$]

how the hell did you get that lose, mine just goes a bit without the case , dont seem to wanna come loose regardless of many times i jerk it.

 

[rxrider]

You have to split the monoblock and the bottom piece to be able to lift if out, if I remember it correctly that is.

 

[Jona$]

monoblock,bottompiece? you lost me...

i see on the nytro there is 2 bolts under you need just loosen a bit, is that it?

cant find any on the prints more then take of the cover that holds all in place.

Anyways i have not still seen any solution even due i have searched as a hell, only i find is about the viper but that isnt the same design and they dont seem to find any that holds up woithout breaking the bond.

 

[rxrider]

There is no secondary shaft on the Nytro, you lost me now

 

[Jona$]

Im talking about the apex, but should get a look without remving it

 

[thor452]

that berring is pressed on i know first hand had a belt blow out kill that seal and had to have it replaced they froze the berring with NOS to get it back in

 

[TBay Sledhead]

Those are ball bearings not roller bearings which are flat like a rolling pin and can't take any side load.