What is the best exhaust for this mini? And, if there is an exhaust out there that works well in a stock application, what kinds of differences will it make.

Trying to get a little more umph for the kid at the dunes...

any other info on the 90 would be great. Seems to be a cut above his older Scrambler 90.

 

I put the white brother's 'R' on my daughter 90. Also put a Uni filter and changed the main jet to a size 90 out of an xr 100 dirt bike (local Honda shop for about $4) I think it make a pretty good difference in the sand. She also has a set of 18" 6 paddle Gliders. The smaller helps with the power too. She just started flat track racing around here and needs more speed, so I'm about to cut the "pink wire", It's supposed to be the rev limiter, so I'll let you know what happens. I like the W/B pipe. Oh I also tried the "cold plug" in it, but didn't see much difference.