Anyone know of a source for adjustable needles for (or adaptable to) the MC18? It's the only way I'm going to get mine really tuned for this altitude. I'm at about 1500 meters elevation and have the Tyga chambers and modified airbox. Right now the main jets seem spot-on and plugs are beautiful, and we don't want to go any lower on the pilots, but the bike loads up on part throttle before clearing its head.