baddboyy21

Have to say that I am satisfied with Jim's work also. He has great customer service. I have two of Jim's engine. I have a 4mil Hot MX port and a 4mil full drag port. The are very strong runners. You get what you pay for in my opinion.

Good Luck!

Before I spent more money on new carbs and other bolt ons, I would get a new set of cylinders. You are probably looking at about $400-600 for a used set of ported cylinders. Thats a lot cheaper than frying your top end and crank from an airleak or a cylinder cracking. Thats just my two cents.

I would torque the head bolts 10lbs then 15lbs, then 20lbs. Definitely tighten in the correct sequence or you risk warping the head.

I have a Grand River Racing lock up. No nuts and bolts to come loose like on the direct drive set-up.

PM sent

Try SUDCO.com, You can get them to overnight them to you.

someone has to have something they want to sell!

Interested in selling just the engine?

Between $1200-1500, or so. Depending on the setup. I already have 1 12port 4 mil stroker. I have to rebuild it the whole thing. Looking for something to bolt in during the mean time.

Still looking for a complete engine too.

I am looking for a complete 4 mil stroker, ported engine. I am only interested in a port job done my a reputable builder. I am also interested in 4 mil ported cylinders. PM me with details and price.

Can anyone tell me where I can buy some new Shearer inframes? Did a google search and all I could find was results from Ebay.

I dont ride it long enough for it to do major damage...I can tell when it detonates. You can tell when you are melting a piston and a plug. From my experience an airleak usually melts the exhaust port side of the piston. Yes I have checked my compression. I am running 115 octane with 19cc domes. Its a brand new motor. Complete build by Jom. He checked all the seals again when he rebuilt it a second time. I've checked for airleaks on the manifold numerous times. It has to be electrical.

The bike has all new seals and gaskets. There was no other damage to the piston other than the melting of the center. No exhaust port sise damage.