Tom Black Posted October 8, 2005 Burned, please help...bought a '04 450R from a friend in K.C. need to rejet for Colorado (Denver area) altitude, bike has twin air filter, FMF pipe. It had a 170 main, 3rd clip position, and about 1 turn out on pilot screw...I changed to factory recommendations of 160, 4th pos, 1-1/4 turns out and it seems to be too lean, what would you recommend for a good place to start? Share this post Link to post Share on other sites
kfelts Posted October 8, 2005 i used to have a 04 450r it was a to jet right seemed like a few degrees would throw it off..good luck..i now have a 05 250r love it Share this post Link to post Share on other sites
Wayward Son Posted October 8, 2005 Burned, please help...bought a '04 450R from a friend in K.C. need to rejet for Colorado (Denver area) altitude, bike has twin air filter, FMF pipe. It had a 170 main, 3rd clip position, and about 1 turn out on pilot screw...I changed to factory recommendations of 160, 4th pos, 1-1/4 turns out and it seems to be too lean, what would you recommend for a good place to start? what makes you think its lean?your pretty close.you could even be at a 155-158. Share this post Link to post Share on other sites
Tom Black Posted October 8, 2005 Engine smells hot after 15mins or so on the track, I have not pulled spark plug yet to look at it, but before I changed jets I replaced the spark plug (it was kinda black looking) It does seem to run o.k. I am not that experienced of a rider to notice small changes in power, but would like to make sure that I am close to proper jetting. Share this post Link to post Share on other sites
Wayward Son Posted October 8, 2005 if it was too lean it would run noticeably bad. Share this post Link to post Share on other sites
