Who does reliable cylinder boring? And liquid cooled head swap on air cooled R?

[TheRealFatShady]

I am probably going to just buy a new piston after boring my cylinder, that way I can know 100% which piston I need.

Does anyone know a good reliable place that can do this?

Also, can I put a liquid cooled 250R head on an air cooled engine?

[UncleBubbles]

you can't put a liquid cooled head on an air cooled motor because it will overheat from no liquid going through it.

[TheRealFatShady]

Where would the liquid normally come from? Couldn't I add the radiator unit?

[oldskool83]

there was a kit sold years ago to make air foolers liquid R's, you'd be better to get a liquid motor and do that then start swaping out parts they are going to need way to much to even try and work and wont in the end.

[dajeepman]

You need a water pump that the Air Cooled R does not have.

[tundrawolf]

Maybe an electric unit? Still risky.

[TheRealFatShady]

I found a guy with a stock top end locally off an 85-86 R. Wouldn't the only difference in the motor be the top end + radiator and water pump?

[oldskool83]

water pump is located on the bottom end of the motors

[jeffatc250r]

An air cooled cylinder and head work just fine as is, especially here in new england where it rarely gets over 100 degrees. Run what you have and dont go mix-matching things around. If you need a bore-guy, there is a guy I bring ALL my cylinders to in Ware Ma, good service, and good prices (under 60 bucks) If you need more info, let me know. Also, never buy a piston until the bore-guy roughs out the cylinder so you know for sure what to get.