Bicylce-Engines expansion chamber

[wildwood]

Check out this pipe its much much better in terms of performance. It should be instock soon. Just return that one.

http://www.ebay.com/itm/282283527905

That pipe is the real deal look for the mz 65. If you're good at welding the kx 65 is better

 

[bairdco]

Once you tune your engine, the basic x chamber should have a 6" OD belly, with the appropriate diffuser and convergent cones. A KTM 50-80 pipe is about right, but you have to cut and weld to make it work.

I've yet to see a pipe that's not just a re-purposed pocket bike pipe that actually works.

 

[Venice Motor Bikes]

These pipes are pretty good.

you can easily cut the header pipe & make it a little longer (or shorter) to tune it.


https://www.gasbike.net/products/boost-expansion-chamber-muffler-chrome

 

[kelly dean]

I've got one as a budget pipe its better than stock. I found with mine that the flange over lapped the pipe by quite a margin and dremeled that out to open it up