Originally Posted by El Hombre
Check the carb, Genuine Yamaha Tuning kits had a 30mm instead of the stock 26mm.
The autolube pump took a dump on me and wiped out the piston and crank bearings. Ran pre-mix the rest of the time I had it. Didn't have the tools or skills to pull it down and do the work myself. I think the dealer got $150 to fix it.
There are two gears that mesh in the pump, and the bigger one stripped out. You could actually buy the gears back then and fix it. Take it apart and eyeball them, bummer to do all that work and kill the motor.
I saw another one at the '02 Vintage MX race at Hollister. They wanted $1800 for it, no lights or instruments.
Yeah, it has the 30mm carb. When I started to notice the cylinder was different, I checked the carb. Just saw a partial GYT kit (cyl,head,piston & 4 rings) sell for $1025 on ebay last week. My cylinder is going out for plating soon.
I still have a weak spot for the smell of castor bean oil, so... no autolube for this one. I have a half case of Blendzall in the garage from 1975, so I'll put it to good use!!
Not sure this will be worth much when I get done, but it is bringing back a lot of old memories!!