shine13 Posted April 1, 2010 Ok guys, my buddy just bought an xr with a 440 kit basically stock engine and exhaust other than that. The jetting is of... it was jetted for sea level and we ride mostly around 3-6000ft. I don't know what needle is in it, but I was wondering what jetting you would recommend. Thanks! Share this post Link to post Share on other sites
Alex 400 My Rides (2) Posted April 1, 2010 Ok guys, my buddy just bought an xr with a 440 kit basically stock engine and exhaust other than that. The jetting is of... it was jetted for sea level and we ride mostly around 3-6000ft. I don't know what needle is in it, but I was wondering what jetting you would recommend. Thanks! probably dropping down a jet size or two to elevation changes. Check these charts out provided by honda. This should help figure out a rough estimate of what jets you should use. Share this post Link to post Share on other sites
spodeboy My Ride Posted April 13, 2010 I ride at 3000 to 5000 feet. Here's what I did. 1). Yank the backfire screen and snorkle. 2). Drill three 1/4" holes in the end of the exhaust but retaining your arrestors integrity(assuming you have a stocker) 3). Go to a 58 pilot and 158 main. I live in the high desert in cali. It runs like a champ now. Share this post Link to post Share on other sites
