66cc sbp pipe tuning power w porting help please

nope. would have been about 7 am :) if the posting time and my time are correct...




mmmm, vladivostok time :)


otherwise. ha ha ha ha.

but, really...other than clicking on links, it is the way to go...

set up for reeds, ie, piston cuts.
run a stub exhaust, no tuned pipe at all. tweak ports for desired grunts and rpm.

attach pipe, fiddle with HEADER length until desired RPM and pipe are in synch... and desired grunt will increase.

retune carb to suit new setup.


(im leaving the door open here, but... we shall see)

you cant have low end and top end out of the same engine, with a 2 stroke.


even if a lil 37cc polini or similar can pull 110 kg on a single gear and get to 120km+ in stock trim...


i dont consider 8000rpm as being terribly fast, when it comes to an engine. still got twice that on my moto before redline...

on a lathe but, even 1000 is scary...
 
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