Not a "ticking time bomb', it will run, just not as good as you would expect since the port timings will be considerably off. Once ported and flowed for the added stroke, it will perform much better and you will see the benefits of the stroker crank, specially down in the low part of the power band.

Carlos

 

How much would it be to have it match ported? I've been considering a BB setup. Its strictly a xc bike, so gas milage is a concern. I like Esr cylinder kits price but I've blown 2 of them up in a month. Front seized up on their new cylinders. Any luck with tge new cylinders? Any idea what displacement I'm at. 265 with a +4 crank.

 

Around a 265CC to 288 CC depending on bore (66.50 to 69.50)....IMO seriously consider the 88/89 OEM cylinder, properly ported, flowed and setup with the plus 4 MM addded stroke it will out run the 310CC kits. PM sent....

Carlos

 

is there a real noticeable difference in performance between the 85-86 and the 88-89 cylinder? or can they be ported to were there would be no difference?

 

The 87 and 88 cylinders (89 used 88 cylinders) have a greater potential to porting changes IMO. Nothing wrong with 85 or 86 cylinders, just the 87, 88 are slightly better in overall performance or useable power band, not necessarily more HP.

Carlos

 

Have you spoke with them about that flr? Problems like that is a sure sign to dig into other possible causes....

 

The old motor had a thin spacer setup, and when I got the crank from him he gave me a spacer that was setup for the + crank to set everything back right where it should be. I called to confirm. His work has been nothing but great for me. Last race I pulled 3rd on the holeshot on a dead engine hands on your head xc race and stayed in 2nd the whole race till the end when I got worn out and settled for 3rd. But everyone was suprised with tye little 265. Even drug a 330 esr.

 

Well it sounds like you are set, best of luck in your racing

Carlos

 

Thanks for your help carlos. Ill be building a new motor soon so ill be giving you a call. I still want a price on a woods wurks pipe from you.