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yea the problem is I have no clue what to do. I am totaly new to tearing jet ski motors apart. I was really stoked to buy the cylinders from Micheal but now that I find out they will not fit without modifiying my cases i am bummed.

yea sorry

He is boaring to 83mm $800 total for 61x cylinders ported and bored to 83mm. pro X pistons he is going ot port match my manifold and tune my head pipe So is it going to bolt right up or not??

I currently have a 90 superjet with stock 650 in it and factory B pipe. I have been riding stand ups for 2 years and this will be my 3rd. I want to start to learn some tricks and possibly barrel roles. Anyways Michael Miller screen name blasterboy1980 has offered to take a 61x cylinder and...

Yea I will have stock 6m6 cases but am having someone on the sight port and bore a 61x cylinders out for me and the bore will be to have 83 mm pistons and he said the cubic inch will be 740 And he is also port matching my factoy pipe manifold

Running a factory B pipe

Have 1990 superjet with 6m6 cases, stock reeds, intake, and carbs, 61x cylinders ported exhuast and bored to 83mm with pro-x pistons and head at 170-180 PSI and Factory B Pipe. I jump waves and want to learn flat water tricks. Nose Stabs, Barral roles, ETC..... Dont care about top speed...