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Discussion Starter #1
Mods Mods Mods YUMINASHI RACING

1 150cc Light Bore cylinderset

2 Light Bore High Performance Fuel Injector

3 Racing double valve spring conversion set

4 X-Speed exhaust - the exhaust is shortened by 10 cm

5 Airfilter orginal box mod " cover suit still on "

6 replacement for aluminum bolts in many places - various holders and shield removed - about 10 to 12 kg lighter than the original bike



performance after running-in the Bigbore kit, I tested today on highway

front and rear sprockets are standard

pulling power from scratch is so much better now " I am 188 h 93 kg "

it takes me easily to 117 kmh - 73 mph still sitting up, I still think there is much to be gained in a better exhaust and filter system

I know Roman from RZ racing still testing more stuff

thank to Snakeibf for his super good YUMINASHI build thread - and Roman at RZRacing for super service
 

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Discussion Starter #4
it was not up in the limiter yet - I will try today tucked in - to check for improvement

I'm considering shortening exhausts additional 5 cm more
 
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