Im very impressed of you guys...you are really great people=) all of you;)
Nice to see that we for different contries can share knowledge of the bike=)
last year, i was at Geilo for a snowkite session, i can say that the Norway's people are very very nice and cool too !!;-)
well, i have heard that yamaha have made a motor that is just like 125,200,225 whatever..but the pistons are just changed and the 125 have a sleeve in the cylinder than can be taken out at people can set on a 225 piston...
I have not tried to take up the sylinder too look in it...has anyoen done it? well... it had been cool with a 225 tw.....
In norway they say....you don`t trim a yamaha you just make it a real 225ccm...the bike is built for 225ccm=)
you must waiting for Freeman who is on travel in Madagascar, the guy (mais non, il s'appele pas Guy freeman) want like you, upwork his TW 200 to 236 with an xt225 engine blok imported from USA, let have a look to this post Andreas ;-)
http://banzai.free.fr/modules/newbb_plus/viewtopic.php?topic_id=1119&forum=11