Well it has finaly come to fruition. Had a proper shake down / test session over the weekend. Passed with flying colors....Kind of. Should replace the shagged chain as it jumped the rear sprocket and made a bit of a mess that called a halt late in the day. Otherwise performed as expected.
Whilst there has only been mild work done to the engine it seems to work well with an increase of power from 6-8k. From its standard factory spec it is running a larger carb - VM25 - and a modified rg250 expansion chamber. I have opened out the transfer ports and matched the exhaust port. That is all.
The test run was completed on a Go Kart track and whilst this doesn't allow for supersonic speeds it was still a valuable learning experience in the way the bike operates and handles. Had previously done a few laps of my neighbourhood "under controlled conditions" but this was inadequate for true fact finding.
Once I work out how to upload video to you tube I will show you how it went.
Happy days