Re: 300 kit on E bay
 

That's very interesting.The ones that use it seem to like it.
:) :cool:

Re: 300 kit on E bay
 

Thanks trykemike. Good reading!

Re: 300 kit on E bay
 

wow, those really are good recommendations. Now I'm interested, too.

And, they are still listed on ebay: http://www.ebay.com/itm/GN300-GN250-...#ht_2558wt_932

Are we sure the gn250 top will bolt up with a gz250 bottom?

Re: 300 kit on E bay
 

Interesting kit for more displacement. Do a little research of part numbers for the gaskets on the GZ and GN. If the cylinder base gasket and head gasket are the same you might have a winner. Keep in mind this mod might be very expensive overall.
If it is just a R/R then go for it. The increase in hp and torque would be really sweet.

Re: 300 kit on E bay
 

Ok, I looked up the PN for cylinder head gasket and base gasket, and they are the same, cross matched, for the gz250 and gn250

cylinder head gasket p/n: 11141-38201
cylinder base gasket p/n: 11241-38301

hopefully this will help someone else, because my mechanical skills are pretty rusty and I don't think I'd have any chance at doing this without a "how-to" complete with pictures that have red arrows drawn on them and things circled in yellow, along with a story line full of things like, "CAUTION: do not xxxxxxxx here or you will destroy the entire xxxxxxxx assembly."

Re: 300 kit on E bay
 

Maybe hire a professional with knowledge and tools. It could be the best bet for a good mod without reliability issues if you mess up due to rust between the ears.