head differences 03-05 450?

[Motarded1]

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?

 

[geoffg]

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.

 

[Motarded1]

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?

 

[geoffg]

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.