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2mm is a bit too much in my opinion. If you lower stock 760 port timing by 2mm you will be lowing the port opening by over 5 degrees. If you lower it that much it will still have good bottom end but will start to sacrifice mid range. 1.5 mm will be plenty to give you good bottom end and not...

to combine everything said above. Bend solder in an L shape and make sure that it goes all the way to the cylinder wall from the spark plug hole. when testing make sure the solder is parallel and directly above the wrist pin. only spin or crank the engine over a few times. measure the flattened...

The miss match between top of exhaust sleeve opening and the top of the port in the casting should be left as it is. The minimal effect on the Ports max velocity and flow isn't worth the extra work and piston pop up you would have if you grind up to fix that. I've run both ways and with equal...

To get the most bottom end out of the 64x cylinder you do need to cut the bottom of the cylinder or top of the cases, cut/adjust transfer Ports to compensate for lowing of cylinder, then re cut the squish relief in the combustion chamber domes. That being said, before I started doing all that I...

Im gonna assume you mean 37mm not 3.7. At 37mm (1.456"), assuming your cylinder is stock height and hasnt had any material decked off the top, that is quite high exhaust port timing. Still not sure if thats high enough to lower the cranking compression over 30psi. Would check piston to cylinder...

Believe me the 760 cylinder CAN have awsome power. There are some port timing changes (minor machine work) needed that are quite easy and cheap (way cheaper the BB sleeves and the required machine work). When set up correct a 84mm 760 will run just as good as any 61x big bore with 84mm bore for...

A lot of good info above. I have run all three carb set-up s on 61x cases. my 38s were on the same pro Tec manifold. 46 single on a 701is minimal to no increase in power with a great decrease in fuel economy. 38s were also minimal power increase on the 701but actually got better fuel economy...

I dont know why you bother even having this crappy freeride again, its not like anyone had any fun.... In all seriousness though, many know i was not 100% on board (fearing for my beloved ride spot) in the early stages of the planning last year. But i came around to the idea and had a blast...

you won't be sorry

unfortunately through all the pissing matches in this thread there is a real point lost. so many people get in this sport and get so set on doing rolls and flips they don't bother to learn handling and ski control. I'm sorry but there is no way you can have as good of control with both feet...