fishinghawk Posted December 10, 2004 I bought a Yoshimura slip on for my 04 DRZ400E California model and removed the air restrictor from the bike. The California model of the bike comes with the Mikuni BSR36 carb but the other 49 state model of this bike comes with the Keihin FCR39 carb. has anybody ever re-jetted the Mikuni carb with this pipe? I find tons of mods for the Non-California Keihin carb but can't seem to find anything for the Mikuni. Any help would be greatly appreciated. Looking for mainjet and pilot fuel jet sizes. Thanks again Share this post Link to post Share on other sites
