Because of Emissions the carbed motors are jetted extremely lean at an idle, that can cause the problem you are having. They are extremely easy to plug up, might be time for a carb cleaning. Or your idle is to low, Or something you have to live with
Here is the correct # for a chrome bore piston 39-17286A12 which supersedes to 39-827491A12. So I am going to buy a used Mercosil piston and compare them. If this is true I am thinking you should be able to use the WSM kit for the Mercosil motors to rebuild the older chrome bore motors.
This is the part # for a standard ring on a Mercosil Piston
39-827491A12
This is the # for my chrome bore piston. 0B238464 - 0G044026 (USA)
39-827491A12
And WSM also lists that ring part # for the Mercosil block that way. I also know that these are 12 packs
What the hell is wrong with you!!!! Now you insult owners of Yamahas because they may not have a lot of knowledge. IF and that is a big IF you were a professional you know that those are the people that keep the doors open at the dealerships. So why insult them and call them stupid? Why insult...
You were told to press it on and given a suggestion on a press. You then pressed it on using the advice given here. So by taking the advice you successfully installed the brass gear on the crank. So you not only take up peoples time you are mad about the advice. Then you act like an ungrateful...
You are the one who is butt hurt. You got free information and are nothing but a spoiled ungrateful 2 yr old. By the way you did have to press it on like Scott said.
