Where can I find 30 over piston and rings for my Tri-Z???
So I went to put new piston and rings in my 85 Tri-Z. When I took it apart I noticed that it already had a .010 over piston in it. Also the sidewalls looked a little scratchy so I wanted to have it bored out so I could get it back to running 100%. The guy at the machine shop said it would be best to do 30 over because 20 over might not be quite enough. So now I have a fresh jug that's .030 over or 68.75mm instead of the stock 68mm. My problem is I can only find the stock 68 size and the 2nd overbore 68.5 size. Where the heck can I find a 3rd overbore size piston and rings? I looked on Google, eBay, Rocky Mountain ATV, ect..... Everybody has 68mm and 68.5mm but nobody seems to have 68.75mm? Am I not using the correct numbers or terms? Can anybody help a brother out on this one?
'' Mixin gas N haulin _ss''
1985 250R-310
1985 Tri-Z
1985 Tri Zinger-X's 4
1973 atc70