hi,
does any body know of or heard anything on the 650cc bigbore kit for the uxv 500??
has anybody done some mods to get bit more power from the 500 cc engine on the mxu or uxv

regards

ddt
RSA

f.y.i from Patrick Saunders / Pres./Senior Editor
All Terrain Vehicle Product Tests

I notice a big difference with the MXU cdi box in my machine, but I have air box, muffler, & jetting. The cdi box from the mxu removes the rev limiter and allows you to go faster.

The muffler is tough to work with because it has a catalyst in it, and is very restrictive. I am looking for more power, not noise when I do my mods. You can take the cap off the muffler and cut off the restrictor cone, giving you a little better bottom end.
There will be a new muller soon that will give you more power without having to fiddle with your stock muffler. This kit will be offered with the muffler, jets, and airbox lid.

I went up a couple of sizes in my low speed jet to a 42.

I removed the 122 main jet and replaced it with a 130 main jet, but you can use a 124 or 126 main, but you don't get that punch.

I have the epi spring clutch kit here, but I have not felt I needed any clutch work yet because I have had no clutch issues like some have experienced.

The piston kit is still in the works and I cannot talk about it yet.

Patrick Saunders / Pres./Senior Editor
All Terrain Vehicle Product Tests
2001 13th Ave. South,
Escanaba, MI 49829
USA
Tel 906-241-3400
E-mail: jps @ atvpt.com
Web site: www.atvpt.com
Forum: www.atvptforum.com