BoneStockRacing87

Can BB 404 sleeved jugs be bored? i have trinity 68.92 pistons and they are out of the tolerance measurements. Can i bore them out anymore to keep from having to buy new cylinders, like cubs......... Thanks guys

I have a trinity 404 big bore top end in my bike and I am putting it back together after a complete restoration and build up. I had my jugs & pistons measured and they came out to .0075 i know that tollerance is .003-.0035. I need some help..... what do i do? Do i buy new cylinders/ pistons and junk the 404's? My cylinders have sleeves in them and are maxed out on the bore.... I think. I need some serious advise!!!!!! my pistons are 68.92 trinity pro-lites with stock jugs ported to the max and welded by JSR racing in andover kansas. PLEASE HELP THANKS GUYS