[VanillaGorilla]

has anyone used one of these thrust chambers? http://powroll.com/P_HONDA_XR50.htm . I know making a silencer longer would give you more back pressure but i dont know if it is the same way with four strokes.

 

[SLAyER]

"Powroll muffler spacer alone: Useless, does nothing. If it wasn't included in the big bore kit I wouldn't have it. It does look cool though. I had it on before I installed the big bore and noticed no change."



That was taken from 50ccracing.com

 

[five0addict]

i dont like those 50ccracing people.

if you read on the website its reccomended for the bore kits, and im sure it does SOMEthing..