Would an unmarked cylinder on a 2002 Pro 200 suggest something different in the engine? The cylinder does not have the Gas Gas name cast into it on either side. It is also lacking the round symbol with the number inside that I believe is some kind of casting mark. The outside finish looks a little more like paint that is wearing off than what ever is standard.

It's probably an aftermarket kit fitted by the previous owner.

Probably the old 160 jug.

Can you tell by looking? See below. Was the 160 unmarked and would it fit a pro? I have heard of S3 cylinders but assumed they would have some marking.

Edited January 7, 201313 yr by mcman56

I went and looked at some online photos (google search) of the 02 pro 200's and that looks stock to me. I couldnt see any markings on the ones I found - although none had great pics to inspect. Thinking about it, i doubt the old 160 jug would fit the Pro cases. I "think" they bumped the motor to a 178 (or something close to that) with the pro - but maybe that was later.

Now seeing the photo that's definitely a Gas Gas cylinder:)

I agree with laser about the 160 jug as the cases DID change.

No markings on my 02 barrel either..

-Jan