nljustin Posted September 25, 2001 I've read that a few people have cut holes in their airboxes on the 520's. Would someone mind giving me the step-by-step including the necessary parts? Share this post Link to post Share on other sites
Jon-D Posted September 25, 2001 Has anyone modified the airbox on a 400, and if so, was the result noticeable? Share this post Link to post Share on other sites
Dr.s Posted September 26, 2001 Pull your airbox cover off while riding to see if it makes a difference. Share this post Link to post Share on other sites
WFO_Pete Posted September 26, 2001 Attention!!! DANGER! DANGER! DO NOT remove the air box cover while riding, it could result in a nasty fall. Besides the damn thing is hard enough to get off when the bike is stopped. ------------------ '01 520EXC, '74 YZ520, '71 TS400, '86 XR250. Share this post Link to post Share on other sites
gbvetracer Posted September 26, 2001 If you cut vent holes in the air-bix cover, you have to go bigger on jets, right?! Wont that lean it out too much without jetting? Share this post Link to post Share on other sites
Chris_Slade Posted September 26, 2001 I still think people are too fussy on the jeting aspect. I can't believe it would make difference that anyone but Charmichael would notice. Elevation here, 350 MSL, when I took my bike to CA, we rode as high as I think 4k, at Glen Helen, Elsinore, and Comp Park (at least 3500 MSL) She was a little harder to start, (2 kicks, not 1) and I got backfires when starting, and sometimes under decel....but I mean, it didn't make a difference. Unless you're top gear, WIDE OPEN the whole time....power shouldn't be a concern. My opinion. ------------------ '01 KTM 520 SX '95 KX 250 FOR SALE!!! -asking $2000 with decent amount of plastics/decals, parts!! AMA Dist 6 Member Hare Scramble Class B #523 Share this post Link to post Share on other sites
