Mikko Nassi wrote:but I did back 2 back test at sepang many years ago on 100cc.
because 11 will be a disadvantage during rolling lap on green light drag race to the 1st corner.

Did it work?
Are you sure you didn't change anything else as well?
It seems there are 3 opinions to what the difference is now:
- No noticeable performance difference.
- Larger drive sprocket = more uumph early on.
- Larger drive sprocket = less uumph early on.
Wow makes me feel all nostalgic.
But i'm wondering is it for the wrong reasons.
Is this the stupid race where our wonderful ball headed joker clerk of course decided to hold the red flag my standing in the middle of the finish line when the field is about to start and caused a massive massive pile up with someone ending up in hospital?
I remember coz i didn't get to start the race and was a casualty.
10th tooth? if i recall back then i was using 9th tooth for Shah Alam and 10th tooth for sepang.
As for the sprockets, i heard that when the late Lotta Helberg when she was holidaying in Malaysia, after every heat she changes a brand new sprocket and chain....
I guess its for reliability and also sprockets do get stressed and gets ever so bent.
My 2 cents.