I just purchased a well used 1987 TY350. Can someone tell me what weight/type of oil is used in the transmission and also the quantity needed? Thanks, this is my first trials bike so I'm sure that I'll have many questions.

Edited March 6, 200917 yr by endurojunkie

Only two years of the 350, 1985 and 1986. The `86 had a reomote resovoir for the rear shock. `86 had alot of other improvements also, mainly the frame. Oil quantity is stamped on the case by the kickstart. I believe it was 650 cc. 10w30 would work, but seems I always ran Bel Ray LW gear oil. Great bike, I used a yz125 wheel and master cylinder for a disc upgrade of the same year. Enjoy.

I use Silkolene Light Gear oil in Yamaha engines because then the clutch plate don't stick together as badly when the bike is stood for awhile.

Thank you for the information. You are correct, the bike is a 1986 model.

Thank you for the information. You are correct, the bike is a 1986 model.

Another way to tell is that the 86' has a smaller rear sprocket than the 85' due to different internal engine gearing. I've had good luck finding some TY Mono restoration parts for my 85' at B&J Racing: http://www.bjracing.com/ty350.html and I don't think they are too far from you.

Jon