http://elcorramotors.blogspot.com/2015/07/rsd-two-stroke-attack.html
2ストローク攻撃（笑）
1997 TZ250のフレームに、RD400のエンジンを搭載。
ヤマハ市販2stの推移：RD→RZ→RZR→TZRパラレルツイン→TZR後方排気→V型TZR
1997年のTZだと、V型エンジンのフレームですね。
RDは乾式クラッチではないので、腰下の部品は同年代のTZから流用でしょうか？
右カバーは、TZだとキックはない（押しがけ仕様）ので、削り出しで作ったように見える。
RZだとクラッチ横にオイルポンプとウォーターポンプがあるが、このマシンにはないので、混合仕様でしょうか。
空冷フィンに穴開ける手法のルーツは、ヨシムラですね。
エンジンを、カルガードで塗装すれば完璧であった（笑）
こういうの見ると、2stで1台作りたくなりますね（笑）
Roland has always wanted to jam a 2 stroke street motor into one of his race bikes. Thanks to Born Free 7, he got to make that happen!
Powered by a 1974 vintage Yamaha RD 400 motor wedged into a 1997 TZ 250 chassis the bike promised to be interesting. Sourcing parts from the shelves of Team Roberts Grand Prix race bikes as well as Roland’s own stock pile of TZ 250 GP bits the machine’s racing heritage grew into a bike that balanced the custom world with that of GP racing. Fast, incredibly light and good handling the RDTZ is a blast from the past and a look into the future of what custom bikes can be. All fab and build were done by Roland and the team at RSD including Aaron Boss and Scotty Diminick.
Check out www.rolandsands.com for more information!
Music by: Benj Heard - Whatever Doesn't Kill Me (Better Run)
Directed and edited by: Joseph Hitzelberger
Filmed by: Nik Wogen
Fabricators: Roland Sands, Aaron Boss, Scotty Dimick
Rider and Project Manager: Cameron Brewer
02：50～ 登場します↓
Born-Free Invited Builder Roland Sands
RSD "2 Stroke Attack" RD400/TZ250
https://www.youtube.com/watch?v=q5ZH37M3UWc
Yamaha RD400 Custom Racer by Roland Sands Design
https://www.youtube.com/watch?v=EqGWyA6eR90
Born-Free Invited Builder Roland Sands
https://www.youtube.com/watch?v=qNsYb0ITWtQ