head differences 03-05 450?
 

First off can I put a 05 head on a 03? I see that there is a hole of some sort on the left side by the exhaust cam but dont see anything else right offhand. What is this hole for? Will this work or be a big pain to do? Benefits if any?

I think there are an extra 2 head bolts on the 2005. I think there were head gasket issues on the earlier models. Check the parts books from the Gas Gas web site to be sure.

ahhh I see that now. I could use a 05 lower cylinder tho, that doesnt look like the base gasket is different. Yes I had a head gasket problem now a bent valve problem so thouht it might be easier to get another head.

but what is the spot on the head by the exhaust cam?

Hi

If you mean on the left hand side on the head, mine is blanked off. I think the designers had a tacho drive in mind. I don't know of a model that has a mechanical tacho though.