Taper Bore Carb

Has any one here had any luck taper boring carbs? what improvements were noted? How about cutting heads down for more low end??
Thank you

There is the process the porting guys around here old enough to have dealt with these type of cylinders called decking. It involves cutting down the base of the cylinder and then modifying the head as the piston comes up higher than the top of the cylinder. That moves the ports down. I have a 78 360 that has been done to but never had a stock one. The stator loosened up and I did an engine swap to something newer. Not an exact answer to your post but I think that is the way those porting guys would tell you to go.

Fran

Ya I agree. Lowering the cylinder works great if there's room.

First thing I'd do is get some solder and check your squish distance. If it's large you can install a thinner base gasket and get a noticeable improvement in low end snap and crispness. Depending on what your squish measurement shows, you may or may not have to machine anything.

I had a 98 Honda CR250, I did that to. Took .5MM off of the base. Made the bike bark.
Bill

On Maicos, i cut the head and the squish band. Makes them pull hard low to middle.Plug is in the center, makes it easy to do..

Hey Bill,
What are you doing to the combustion chamber confiquration to increase low to mid performance?