9.8 but have some issues

[simmo]

Gearing is 17/45 so mph with that setup suffers because changing into 5th gear just before the finish line. the 1st and 2nd gear acceleration with extensions is just so much quicker than before without having to worry about flipping the bike.

That gearing may be too aggressive. Simmo runs his gen 2 around 4 to 6 over and only uses 4 gears (not sure of his gearing specs) and he weighs around 85 to 90 suited and is running 9.1s. Try the 43 rear (i'm running 17/43 SWB on my gen 2 and i'm 123kg suited) which will do 2 things. It will reduce the amount of wheelspin because its not as violent and it will make 1st gear and the bike more rideable.

2 teeth up on the back I'm running now & I run soft track tyre a dunlop qualifier atm, even with that I have had to drop the rear tyre down as far as 12 psi at time on a street slippery night track to hook up