[forkseal]

Does anyone know if the stock header pipe has any restriction where it bolts up to the motor? On mopeds the pipe usually has a welded area that makes the diamater of the pipe actually smaller. If u drill that out you gain power anyone know??

 

[forkseal]

I have a yosh slipon

 

[whitedevilws6]

I doubt it. If anything, the only purpose of getting a full system vs a slip on, would be for aesthetics. This bike seems choked down for sure, but not that choked down.

 

[forkseal]

I removed air filter spark arrestor and inner intake tube helped it aloot

 

[whitedevilws6]

Do you have to drill out the rivets in the end cap to remove the spark arrestor and baffle?

 

[Dodgerider26]

The restricter on the stock pipe is the catalytic converter. Switching to a slipon makes almost no power. Switching to a full system has been proven by our members to gain about 1HP at the wheel. The difference all seems to be in the header pipe.

Aftermarket headers have a larger bore, smoother bends, and no catalytic converter.

 

[whitedevilws6]

Yeah I see that. Big fat catalytic converter stuffing up the exhaust. Definitely gotta get a full system.

 

[forkseal]

There is def a difference on mine with a slip on. I could tell right away. Just thought i could get some free hp

 

[MotorcycleMike]

I have checked and there are no restrictions other than the factory design. I have also removed the rear muffler cone which is only for aesthetics, the muffler is completely welded. I'm going with a full system myself.