the usual broken studs in the basket. what other models of yamaha will work 350, 125, or an mx 250? if any of you happen to be on the island or lower main land of b.c. give me a call (250) 418 5669 thanks, jer.

I think that it was only the 250 mono clutch basket that fittes, the 350 was the only other mono and (so I believe) had a larger clutch.

If you look in the back of T+MX there should be an advert for ellastone offroad, they will send you one, and they usually only send good quality parts.

The plates are the same as some of the YZ models of that era, but one less plat euse, ,and narrower gear and basket.

250 and 350 I believe use the same clutches.

FWIW the 85 and 86 'might' have used different parts. I had one apart, tried to rob parts from another part engine I had, and found they had 1 or 2 teeth more/less on the crank gear and basket. That may have been a substitution of parts, which is what you are asking for, but I have no idea where the odd parts came from.

I just assumed the two years had slightly different primary ratios. Not sure if true or not.

thanks for the info, more is welcome. does any one have a picture of whats in there? i don't have a manuel.

I can scan manual page and parts exploded, but won't be back access to scanner til next week. maybe later.

Pretty typical japanese clutch asm with needled bearings, thrust washers, push rods, small ball in middle , etc.

kcj

thanks that would be great, jer

There was a change in the primary gear ratio around that time that would be seen. This would also be reflected in the rear sprockets so you could tell when it was changed. From my understanding the TY mono was based on the YZ490 so maybe some of those cluch parts work.

there were two sprocket combos used, 10/35 and 12/42, but both had the same 1-3.5 ratio.

I suspect the 10 front had some vibration or wrap issues, or maybe chain tension loads were too high?