blaster2006 Posted March 10, 2009 Report Posted March 10, 2009 hey, friend of mine just got his cubs, dune ported, from jeff... im posting this for him as i dont know the answer to his question and he doesnt have much time so im posting it.. anyway, before the cubs.. he had stock cylinders with some random porting done from a mechanic shop near by, he had 36mm mikuni flatsides.. and he has a 4mm stroker.. his mains were 330s ( that being veryyyyy slightly rich). when he had that the pull was perfect everywhere, had loads of torque.. meaning on 6th gear if you went slow and then gased it full it would pull immediately. he just got his cubs ( already set up for 4mm stroker) and the pistons, and the big bore domes.. 22cc... he put the cubs on.. and then jetted 1 size up on his 36mm carbs.. went to 340s, and the mehcanic who put the cubs also added premix but he said it was a very lean mixture.. he said he made it with alot of oil as its better for the pistons when new so its not dry.. so he put a LEAN mixture.. im guessing like less than 20:1, when he fired it up.. let it warm 4 mins.. he rode it and said it wasnt pulling properly.. like on 6th if he was going and not much rpm, then he pushed it full it would like take alot of time to pull etc etc. he then got new gas, and mixed it with klotz super tehcniplate.. at 32:1... and then at the same time put 350 mains ( he did not try with new gas and the 340 mains). and he said it pulled much better etc, but it could get better. so hes thinking to go with 360 mains.. or 370s.. but hes at sea level and hot temps..thats basically going up 3-4 sizes just from cubs.. he had the 4mm stroker and same carbs.. just the pistons and juggs changed.. dome cc is also same (22) is it normal to jump up? im thinking the better difference he felt was from the gas... and maybe it would have been better with the 340 mains and just adding new gas.. but instead he did 350 mains and new gas and it was better.. so opinions would be nice.. and what you guys with cubs.. your jetting... at what its at.. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.