Gear shift problems

[Supertee123]

I went for a spin today and felt the bike not shifting down properly,I removed the clutch pack and noticed a broken shaft shift spring.
The bike is a 2012 with 75000km,I’ve a new spring and gasket ordered so should be up and running soon.

 

[Nikolajsen]

Good job

 

[Cycledude]

Thanks for the story and pictures ! Hopefully all turns out well.

 

[WJBertrand]

Way to zero in on the problem. What led you to look there first? I had a little $3 shift pawl return spring break on my 1983 Interceptor but in that case I could not shift at all. Shifter felt loose and disconnected.


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[OldRider]

The part number for this spring probably fits over 100 different Yamahas and they are prone to break for no reason at all. There have been several reports on this forum over the last several years of springs breaking. I carry a spare under my seat JIC.

 

[gv550]

I'd like to have one under my seat as well!
Part number, please?

 

[Supertee123]

Way to zero in on the problem. What led you to look there first? I had a little $3 shift pawl return spring break on my 1983 Interceptor but in that case I could not shift at all. Shifter felt loose and disconnected.


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I was hoping that was the problem as I limped home and not inside the transmission case $$,

 

[OldRider]

This spring centers the shifter after an upshift or a downshift. If you move your shifter up or down with your hand you will feel this spring doing it's job. When it breaks, the shifter will be loose and not center itself.

 

[blitz11]

This spring centers the shifter after an upshift or a downshift. If you move your shifter up or down with your hand you will feel this spring doing it's job. When it breaks, the shifter will be loose and not center itself. View attachment 49786

Thanks! good to know. It's on the parts order list for this fall.

Thanks again

 

[EricV]

Way to dive in. I've not done this repair before. It appears from the FSM page 5-71 that it's necessary to remove the shifter and pull the entire shift shaft out from the clutch side to replace the shift shaft spring. Is that correct?

 

[OldRider]

Way to dive in. I've not done this repair before. It appears from the FSM page 5-71 that it's necessary to remove the shifter and pull the entire shift shaft out from the clutch side to replace the shift shaft spring. Is that correct?

That's correct. Take the linkage off from the left side, remove the clutch and pull the shaft out the right side. Would be a simple roadside repair except for that large nut in the center of the clutch.

 

[EricV]

That's correct. Take the linkage off from the left side, remove the clutch and pull the shaft out the right side. Would be a simple roadside repair except for that large nut in the center of the clutch.

Thanks. Yes, that large nut is staked in place and a bitch to remove w/o an impact wrench or the clutch tool and a long breaker bar. BTDT.

 

[Supertee123]

Thanks. Yes, that large nut is staked in place and a bitch to remove w/o an impact wrench or the clutch tool and a long breaker bar. BTDT.

You can bring it up to 5th gear and wedge something between the spokes that should keep the shaft in place to get the nut off.

 

[OldRider]

You can bring it up to 5th gear and wedge something between the spokes that should keep the shaft in place to get the nut off.

That would probably work. I can't see you taking out more than half the spokes before it breaks loose. I'll try that next time.

 

[blitz11]

That would probably work. I can't see you taking out more than half the spokes before it breaks loose. I'll try that next time.

If you're riding with a buddy, have them stand on the rear brake pedal. That might be enough to hold it (but I haven't had mine apart, so i could be wrong (again)).

 

[tallpaul]

That would probably work. I can't see you taking out more than half the spokes before it breaks loose. I'll try that next time.

The whole "wedging the spokes" thing freaked me out too. 5th gear and applying load to the rear brake pedal would be my suggestion.

 

[WJBertrand]

I've done the rear brake thing with the transmission in a tall gear on other bikes to break the clutch hub nut loose as well as to re-torque it when reassembling. Worked fine.

 

[OldRider]

I'm sure nothing could go wrong.

 

[Supertee123]

That would probably work. I can't see you taking out more than half the spokes before it breaks loose. I'll try that next time.

I'm sure nothing could go wrong.

I'm sure nothing could go wrong.

nothing has gone wrong,the nut is 125Nm and when it’s in 5th gear there’s very little torque transferring to the back wheel +when a wedge is placed away from the center of the hub you see very little stress is placed on the spoke.

 

[Supertee123]

nothing has gone wrong,the nut is 125Nm and when it’s in 5th gear there’s very little torque transferring to the back wheel +when a wedge is placed away from the center of the hub you see very little stress is placed on the spoke.