Hey all, Just installed a CVK40 last weekend, and wanted to post my results. Bike: DRZ400SM 3x3 Yoshi RS3 K&N Air filter Carb: CVK40 from a 2014 KLR650 Needle: came from 2144 DynoJet kit, installed in clip #4 position. Jets: 40 pilot, 148 MJ Drilled out vacuum slide to maximum clearance. Elevation: 500 ft Air screw: Screwed it in all the way, then backed it out by 1.5x turns. Used the flexible idle adjuster from the BSR36 Runs pretty well, have had no issues with it so far. I'll get my wideband onto it to measure the AFR, but my guess is that it's on the richer side. My old BSR was tuned to an AFR of around 14.4-14.5, and I would get snap crackle pop from the exhaust fairly easily. With the CVK40, I barely have any pops at all. Installation was easier than I expected. I pivoted the subframe to do it. Carb on the engine boot, installed the cables, wriggled it onto the engine. Longer screws were needed for the clamps. Installed the airbox boot, then pivoted the subframe back to get the airbox back onto the boot. However, I forgot to modify the cable bracket for the pull cable, so wide open on the handlebar comes up short of about 7 degrees from fully opening the butterfly valve on the carb. I am still running the return cable.