upper gear bushing

[SumpBuster]

Get the 1” long bearing $3.
I used this bearing and it lasted longer than the stock bearing.
I now don’t over tighten the chain and it’s lasting fine

660 bearing bronze sleeve bearing , 1” inside diameter, 1 1/8” outside diameter, 1” long

Years ago I made an oilite bushing for my, ahem, Skiroule clutch! When they get warm they release some lube.

 

[ClutchMaster]

Years ago I made an oilite bushing for my, ahem, Skiroule clutch! When they get warm they release some lube.

Yep oil lite is great for clutch bushings.
This is actually a harder material made for lubricated applications, 660 bronze. McMaster actually publishes the impact resistance of all the the different bearing materials.

 

[NYTurbo]

Get the 1” long bearing $3.
I used this bearing and it lasted longer than the stock bearing.
I now don’t over tighten the chain and it’s lasting fine

660 bearing bronze sleeve bearing , 1” inside diameter, 1 1/8” outside diameter, 1” long

Stock bushing isn't 1 in long.

 

[cannondale27]

Stock bushing isn't 1 in long.

Yea mine is 7/8in .873 but I have a Lathe.

 

[NYTurbo]

Yeah, the one I measured was .900 long

 

[PowderFalcon]

Here’s my POS cat 22 top gear after 3000miles...

 

[ClutchMaster]

Stock bushing isn't 1 in long.

Belt sander, hacksaw, file, lathe, multi-tool, sawzall, band saw, meat slicer, electric fillet knife... I’m sure you can figure it out.

 

[cannondale27]

Here’s my POS cat 22 top gear after 3000miles...

Wow lucky they made the gears better than early years or yours would surely have Grenaded!

 

[STAIN]

So to revive this thread, I have been getting a vibration in my feet the past few rides. Went out today and it was worse. Took apart my chain case and the upper gear bushing is toast. 3k miles, 270 tune, chain finger tight and back 3/4 turn.
Has anyone else researched a better bushing?

 

[STAIN]

High-Load Dry-Running Sleeve Bearings

Bronze-Backed PTFE
Plastic Bearings
with Steel Shell

A metal shell adds strength.

Bronze-backed PTFE bearings with steel shell combine high-load and high-speed capabilities. They resist swelling when exposed to moisture and are electrically conductive.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

For
Housing ID Lg. Dynamic Radial
Load Capacity Temperature
Range, °F Each
Bronze-Backed PTFE Plastic Bearings with Steel Shell
For 1" Shaft Dia.
1 1/8" 1" 3,150 lbs. @ 60 rpm -320° to 530° 60695K7 $4.04


Comments???

 

[STAIN]

https://www.bronzebushings.com/bbep...ron-copper-sleeve-1-id-x-1-1-8-od-x-1-1-2-oal

 

[MrSled]

Let me know what bushing you end up using, I would like to change the one the gear I have as well.

 

[Crossfire12]

Put new gear in cheap, seen them for $23

 

[STAIN]

Put new gear in cheap, seen them for $23

I know, been there. looking for something to last longer.

 

[Doowithblue]

A good source informed me that yamaha is coming out with a fix for the upper gear issues. Believe it when i see it.