Are a 83' big red and a 83' 200x the same cylinder heads?

[hawaiirider]

i put a 83' big red motor in my 200x and put a high lift webcam plus ported it, it wasnt that fast. i didnt even think that the 200x and big red may have different heads? i just figured they were the same aside from the compression release?
anybody know?

[slashfan7964]

I'm pretty sure the head on the X was more performance oriented.

[Yamada]

The 200x piston have more compression. The 200e compression ratio is 7.8 to 1 and the 200x is 9.6 to 1. To gain hp with this cam you should at least use a 200x piston, or a xr200 piston or a wiseco 10.25 to 1 piston.

[hawaiirider]

cool, i did notice the piston being much flatter on the big red.
but what about the head and valves? are the valves the same diameter?

[redsox]

you got an 83 200e engine in a 200x frame? how'd you account for the sub-transmission?

[hawaiirider]

it was actually a honda xl 200 frame which is kidna similar to the x frame, anyways i just cut and rewelded it.
still looking for the answer if the heads (valves specifically) are the same on these machines?

[hawaiirider]

ANYBODY KNOW? im just trying to figure out if they have the same heads because if not i need to invest in a 200x head!

[RodKnockRacing]

They are the same heads the only difference is the rocker cover and the decompression lever on the 200e head

[hawaiirider]

thanks for the clarification!