mohler
05-12-2010, 08:31 PM
ok installed new jug and wanted to see how it did with out rejetting,not the right thing todo aperently, i had a factory jug i think with a 155 main or something like that close. went to put my duncan 275 pv on found a crack in the crank had to go and tare the bottom end down replace all the seals put a long rod in and take the short out. put it back togeather. went thru the break in cycle and the plug looked good in the yard there. took off on a streight shot about 1/4 mile long and bam. burnt a hole in the new piston. atleast that all i think that happened aint tore it apart yet. i just wanted to ride it and didnt have the right jets. Lession learned. aint got that kinda money to blow like that anymore. so what is the right jetting? i just ordered a new piston again from duncan, hopefully the nicaseal isnt damaged. i have a 38mm air stricker, cr250r rad valve, fmf fatty pipe and slience., on it help