making my own pipe today.

Corey · Post by **Corey** » Thu Sep 04, 2008 8:41 am

I found a old pocket bike expansion chamber. I am going to hack off the old
rusted out stock muffler an weld on the expansion chamber hope I dont lose any performance.

Corey · Post by **Corey** » Thu Sep 04, 2008 10:59 am

what do you guys think?

Corey · Post by **Corey** » Thu Sep 04, 2008 11:01 am

you think im going to have to carb adjusting? If so what just mixture screws or am i going to have to go up a jet size?

Elite1998 · Post by **Elite1998** » Thu Sep 04, 2008 11:12 am

Don't forget to up in jet size..you'll have to play around with different jetting sizes..find one that runs a hair too rich and back down by one or two.

As for where to start I couldn't tell you..I'm assuming it will depend on how the pipe is made. Just make sure it creates enough backpressure

Dac · Post by **Dac** » Thu Sep 04, 2008 1:04 pm

what he said /\ /\ /\ /\

let us know on how well it works.

Corey · Post by **Corey** » Thu Sep 04, 2008 6:17 pm

NO GOOD! that pipe is pure crap! It barley goes 20 now. Im guessing its not enough back pressure. think if i make a restrictive muffler it will fix it or should i just start over?

Dac · Post by **Dac** » Thu Sep 04, 2008 6:20 pm

yeah, most expansion pipes have a little silencer on the end. Take like a 3 hp briggs tail pipe and weld that on the end.
im not sure ow much it will help, but it might.

Corey · Post by **Corey** » Thu Sep 04, 2008 6:26 pm

what do you guys think about super trap exhaust?

http://www.heeters.com/ScooterPerformance.shtml

Dac · Post by **Dac** » Thu Sep 04, 2008 6:31 pm

never heard of it.

Corey · Post by **Corey** » Thu Sep 04, 2008 6:34 pm

lot of atv guys use em they also make a bolt on for a rukus.

http://webhosting.web.com/imagelib/site ... lx_piceh4m

burnt_toast · Post by **burnt_toast** » Thu Sep 04, 2008 6:41 pm

ruckus is 4stroke..

that expansion chamber is way too small on that custom pipe. and yeah too free flowing i bet. capping it off should help though, and adding a smaller exit hole

Corey · Post by **Corey** » Thu Sep 04, 2008 6:51 pm

so your saying that a fatter pipe is what i need? i stuffed a piece of rubber vacuum hose and it did help but only a little.

Corey · Post by **Corey** » Thu Sep 04, 2008 6:53 pm

yes ruckus is 4 stroke but super trap also makes a different core for 2 strokes.

keithw · Post by **keithw** » Thu Sep 04, 2008 7:39 pm

Go to the pipe calculator in the advanced tech section. Run the numbers and see how your pipe compares.

keithw

darat · Post by **darat** » Thu Sep 04, 2008 11:23 pm

ya i did the whole pocket rocket bike pipe and it sucked so d*** bad untill i put a washer in the pipe to slow down the flow