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Not if I cant even find a 90 bore supplier .....We really need to go the other way, Smaller rear sprocket, 46, I have tried it ,
To get the rev's down !,
But with my size and heavy tank bag, It's a bit too much.
My next Comet, I only have a 45 !! sprocket,
So need more power !, If I ever get the 560 cc done ?.
Here are the two mutes I have made up for the twin racer 'megaphones' they are in stainless and the aluminium end plug is changeable. At the moment orifices add up to around 3/4 of open pipe capacity, side holes are left unburred on the inside and backward facing faces are grooved at 45deg.it all helpsMy idea is to keep the rev's down at 70 ish, I know how they go with a big sprocket,
As I raced it as a Black Flash, With a 2" pipe, Sounded Super,
But still only about 16 seconds for the 1/4 mile sprint,
Far too much noise for me now, Worried about the conrod !.
Tony's engine was destroyed !!.