honda 300 4x4 head

[ikes05400ex]

has anyone put a 300ex 4 valve head and cylinder on a 300 4x4.mines starting to get a little tired id like to bump up the compression a little and i have a extra ex head and cam.if it would work i think it would run good.

[TrailerHauler]

I'm in the same boat, I've got spare 300ex parts and thought about doing the same thing. It appears that it would work just fine, the only thing I didn't look at was where the intake and exhaust connect on the 300ex but I believe its the same.

I'd be curious to see if it worked with positive results!

[250rPRIDE]

i dont think a 300ex have 4 valves does it? i have heard of people doing this mod though

[prepracing]

Originally posted by 250rPRIDE
i dont think a 300ex have 4 valves does it? i have heard of people doing this mod though

it sure does....2 intake...2exhaust

[ikes05400ex]

well i found out for sure. the trx engine rotates the oppisite of the 300ex so you would need a 300ex piston and head but you will need to get a 300ex cam built to run in reverse im told web camshaft will do it.hope this helps