Secondary clutch melted buttons and spit out bushings!

[mckracker]

Last year I changed out my track and all drive line bearings as well as the secondary clutch bushings. I got about 10km into my ride and found my secondary in bad shape. Buttons were melted and the bushings had spit out of the sheave and helix. I put it all back together and am concerned as to what caused it. I used Yamaha buttons but aftermarket bushings. All I can think of is one of the buttons may have broken off and caused the mess. Is there anything else I should be looking at?

Thanks in advance.

 

[Blue Dave]

Last year I changed out my track and all drive line bearings as well as the secondary clutch bushings. I got about 10km into my ride and found my secondary in bad shape. Buttons were melted and the bushings had spit out of the sheave and helix. I put it all back together and am concerned as to what caused it. I used Yamaha buttons but aftermarket bushings. All I can think of is one of the buttons may have broken off and caused the mess. Is there anything else I should be looking at?

Thanks in advance.

My money is on the aftermarket bushings. I realize that OEM parts are expensive but for critical components you get what you pay for.

 

[grader]

when you install the bushing take a punch "dent" the edge of where it goes in so it cant back out. had it back out on me one time after changing it, had to pound it back in with an axe trailside. dalton sells good bushings but dont go aftermarket on the buttons, yamaha only.

 

[badlarry]

1 broken button will not cause this. My sled has engaged strangly for 4 thousand miles. I recently noticed 1 missing button. I replaced all buttons with o.e.m. yamaha buttons and the weird engage is fixed and the 8000 mile sled feels new again

 

[Dano]

This happened to me before with my SRX. I thought I would save money and get kimpex buttons as I thought yamaha's were way over priced for just buttons. Bad move on my part as the plastic melted soon after and spit out bushing and pressed itself into jack shaft bearing and taking that out too.
I'm willing to bet you didn't have OEM buttons even though you may have got them at your dealer. OEMs can take the heat, kimpex melt. As soon as they melt, it's aluminum on aluminum and go off balance and out comes the bushing.

Dan

 

[charlie]

this just happened to me i got a new bushing put in my seconday bt schmidt bros blew the new bushing out a melted a new button repaces bushings with yamaha ones and used so retaining compound got 100 miles in now everything looks good

 

[Grimm]

I had a bushing slip out of an aftermarket helix once. When I remounted it, I used some red loctite to ensure it stayed in. Never came out afterwards. Denting the edge sounds like a good idea too.