upper gear bushing

[NYTurbo]

Same here @ similar power levels, 4000 miles on the stock bushing and it’s in great shape.
Guys with N/A vipers are wiping out the bushings in under 2000 miles.
IMO it has very little to do with the stock bushing. Will a better bushing last longer? Absolutely!

What bushing are you running?

I'll message you the bushing info. Reluctant just in case things go south on this bushing but there is a group of us that are on year 2 with zero problems .

 

[SumpBuster]

SB you crack me up bro!

It's all good!! Gotta keep smiling!

 

[jamsf1984]

Which seems to be a better bushing the 6381k563 or the 6069k57 both from McMaster carr the one is the 660 bushing and the other similar to stock thanks

 

[ClutchMaster]

6069k57
That’s not a legitimate part number

 

[jamsf1984]

Thats the mcmaster number for steel shelled bronze with ptfe coating that was referenced in a post supposed to be similar to the stoch bushing, ehich would you prefer that one or the 660 bushing thanks

 

[4strokes]

I have no idea what you guys are going on about, I just talked to the dealer and Yamaha has never heard of a problem with the bushing in the gear. yes, the part has been updated in the past, but for other unknown reasons. if you replace the chain case oil as per owners manual, with oil from a Yamaha owned oil drill, there is 0% chance of ever having anything fail

 

[cannondale27]

I have no idea what you guys are going on about, I just talked to the dealer and Yamaha has never heard of a problem with the bushing in the gear. yes, the part has been updated in the past, but for other unknown reasons. if you replace the chain case oil as per owners manual, with oil from a Yamaha owned oil drill, there is 0% chance of ever having anything fail

I have a bridge for sale too!

 

[74Nitro]

I have no idea what you guys are going on about, I just talked to the dealer and Yamaha has never heard of a problem with the bushing in the gear. yes, the part has been updated in the past, but for other unknown reasons. if you replace the chain case oil as per owners manual, with oil from a Yamaha owned oil drill, there is 0% chance of ever having anything fail

Wrong, I've changed five so far this year.
This needs to b inspected every 5000 kms for sure.

 

[InRBigness]

We need a sarcasm font. Some people are missing out on the humour.

 

[YukonMP]

I have no idea what you guys are going on about, I just talked to the dealer and Yamaha has never heard of a problem with the bushing in the gear. yes, the part has been updated in the past, but for other unknown reasons. if you replace the chain case oil as per owners manual, with oil from a Yamaha owned oil drill, there is 0% chance of ever having anything fail

That is a relief to know, I was getting worried as this thread meandered along these 31 pages.

 

[fatchance]

Wrong, I've changed five so far this year.
This needs to b inspected every 5000 kms for sure.

I would say this should be done yearly regardless of miles. Just did my brothers winder with 1700 miles and the bushing was so badly galled i can't believe nothing bad happened. This was the superior design upper gear with the oil holes through the gear but not the bushing! DOH! I guess their intention was for all of us DIY'ers to finish drilling the holes out!

 

[4strokes]

heres my 2 cents. the bushings are being crushed and worn down from side play an chattering around with harmonics from the worn chain/belt etc. they run with the shaft, more or less 100%. bushings are more damaged than worn like how the fx phazer steering would slop out from the slightest hit. I wonder what the average trans uses for bushings in comparison, or if it has to do with the weight of the chain. woud explain why the pics on previous page had wear from not using reverse on a long day. keeping the gear synced with the shaft

 

[slimjim2525]

So here's an update. Just did my chaincase today to get ready for my big 2 week trip. My original bushing was totally shot. I replaced the bushing with the McMaster 6381K563. The original gear had holes in it, but not through the original bushing. When I pressed in the new bushing I drilled the hole through it. Set chain tension at 1.5 turns out, and 16oz of 75w90. After 1800 miles the bushing is perfect.

 

[fatchance]

So here's an update. Just did my chaincase today to get ready for my big 2 week trip. My original bushing was totally shot. I replaced the bushing with the McMaster 6381K563. The original gear had holes in it, but not through the original bushing. When I pressed in the new bushing I drilled the hole through it. Set chain tension at 1.5 turns out, and 16oz of 75w90. After 1800 miles the bushing is perfect.

I found the same thing with the stock bushing with oil holes in the bushing and I had my chain tension cranked up way less than 1 1/2 turns out. I think they got it right by drilling these oil holes in the bushing

 

[ClutchMaster]

I have no idea

Yep let’s just leave it at that!