ill give you a liitle history on this i got a local builder to build my 4mm motor when i got it back it never really ran that good, my stock port stock stroke cpi piped bike almost beat it. my setup was 4mm longrod 795 pistons .20 over timing plate advanced %6 cpi in frame 34mmpjs drag ported 14/41 gearing hemi head with cut domes. best times in the 1/8 mile was 8.8s tryed to gear higher but it wouldnt pull it. talked to the builder and he said i needed diffrent carbs and pipes. he said i needed 35.5ftz mikunis and out frame drag pipes. well i got the carbs and grr suicide pipes and try it and still no help. well i took it to anther biulder to look it over and come to find out that the port was for a stock stroke crank. so i sold the cylinders and got another set and had them ported for a 4 mill and went .80 over with blaster pistons. well here is my problem the bike runs better it will leave out in second where it wouldnt think of it before but still i wont runn less than an 8.8 in the 1/8 ive tryed everthing jetting is on tried diffrent timing tried diffrent gearing dont know what else to try. im just wondering if it is in the porting again is there any way to compare my specs with any others so i can rule this out, or any suggestions of things to try