This seems funny to me.
((((I don't mean to offend any one here))))
I spent an entire day building a pipe that ran significantly quieter while adding a small amount of climbing ability to the bike.
It did restrict the top end a bit but i figured that if I want to go faster than 30 mph I'd ride my Bobber.
The whole reason ( for me ) that I built and ride a motorized bicycle is for the smile factor .
The ones on my face and the ones on just about every person I meet while riding the machine.
And I just love to build unusual toys.
But it was surly not for the speed .
If you feel the need for speed, and you are building a motorized bicycle to satisfy that need.
You have brought a knife to a gun fight....
I will admit that search for more efficiency and reliability have led me to alter the engine.
I have added a Delorto clone , I have an expansion chamber that I will run if I can quiet it down properly with a silencer, and am in the midst of some minor porting of the intake , exhaust and cylinder.
So far I have noticed some very small gains.
And am very excited about them.
Speed wasn't one of them.
I share the belief that if we garner to much attention by making loud and annoying machines just to gain a few mph. We will be regulated out of existence.....
The beauty of these machines is in there simplicity and efficiency, not there speed or raw power...... That's my rant for the day....
Happy trails all....