hawk 250 big bore kit?

[Deckard_Cain]

Originally Posted by alex_in_az

that 4 degree timing key is by far and away the best bang for the buck tuning mod on the CG engines, you will not regret doing it

Agreed. I felt a much improved throttle response and easier engine starting as well.

[tknj99]

Originally Posted by alex_in_az

that 4 degree timing key is by far and away the best bang for the buck tuning mod on the CG engines, you will not regret doing it

Yes, quite excited... just have to buy the correct flywheel puller and i think a flywheel holder that looks like vice grips and then work up the nerve to do it, after i watch a few more videos on YT..

[franque]

You shouldn't need a flywheel holder, usually the cup that threads on to the flywheel, as well as the bolt that pushes on the crank have spots to turn a wrench.

[drstansbury@yahoo.]

cg300 cylinder can be machined to fit. The air cooled ones are out there but are tough to find. I have over 1300 miles on one right now.

[TxTaoRider]

Originally Posted by drstansbury@yahoo.

cg300 cylinder can be machined to fit. The air cooled ones are out there but are tough to find. I have over 1300 miles on one right now.

How much did you have to machine off the cylinder bottom?

[drstansbury@yahoo.]

Have to machine the outside diameter of the sleeve to 73mm

[franque]

So no case boring then?

[drstansbury@yahoo.]

I did not bore the case only the sleeve protrusion. Im not sure there's enough case material to bore it without getting into the oil galley BUT plenty of material on the cylinder sleeve. I'm actually getting ready to turn another one down. When I get around to it I'll post some pictures. I have some pics on the hawk250 fb page from my current build. Has almost 1500 miles on it now with no issues. This winter I'm Going to pop the head off and check out how it looks and replace it with a head I just finished up milling 1.25mm off and porting. If its showing excessive wear I'll freshen it up but I don't think it will be needed. I currently have a ported unmilled head wanting a bump in compression to see what that does for me.

[TxTaoRider]

Originally Posted by drstansbury@yahoo.

Have to machine the outside diameter of the sleeve to 73mm

Thanks, I'll have to see if I can find someone around here that can machine one down. I was gonna bore the case but this would be allot easier.

[Megadan]

Originally Posted by TxTaoRider

Thanks, I'll have to see if I can find someone around here that can machine one down. I was gonna bore the case but this would be allot easier.

Any machine shop with a mill or bridgeport with a turntable base can do the work needed in a short amount of time. I just turned mine down at work that way. A lathe could also be used but it is a bit more involved.

[alex_in_az]

Originally Posted by drstansbury@yahoo.

cg300 cylinder can be machined to fit. The air cooled ones are out there but are tough to find. I have over 1300 miles on one right now.

where did you get yours and matching piston from?

[Megadan]

Originally Posted by alex_in_az

where did you get yours and matching piston from?

Piston and rings, pin, and gaskets come with the cylinder. I have the same one he ordered.

[XLsior]

What about the 18mm wrist pin that comes with the cg300 cylinder kit?

the stock 67mm has a 15mm wrist pin, So does this mean the rod/crank has to be swapped or just the the connecting rod wrist journal can be machined out to fit?

[alex_in_az]

Originally Posted by Megadan

Piston and rings, pin, and gaskets come with the cylinder. I have the same one he ordered.

so where did you order yours from?

[Megadan]

Originally Posted by XLsior

What about the 18mm wrist pin that comes with the cg300 cylinder kit?

the stock 67mm has a 15mm wrist pin, So does this mean the rod/crank has to be swapped or just the the connecting rod wrist journal can be machined out to fit?

Not sure what kit you are looking at but mine came with a 15mm wrist pin.