Also off the mark--stomper!
If you had a good Kow 100 -you would have noted it was very good as compared against other 100 cc stuff.
I had Hodaka -which was good - but nat as good.
as for Mike - Save your money-
If your 80 single is simply broken in properly - with even th downspout muffler -you will fing the power in the same ballpark as the 100's - with a pipe that tunes - It is VERY close.
and beats some of them.
This in not just my two bits worth - and for power to weight - or power to cost - well -- .
If you get cold feet tho and your budddies convince you that is is a bad choice - put it up for sale.
Should take ---- 1/2 hour?