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Message: [QUOTE="Canadian Dave, post: 107170, member: 16102"] As mentioned in a previous post in this thread FMF only lists one pipe for the KDX220, the KG-30 Rev pipe. Why? Though the KG-35 torque pipe increases the bottom to lower mid power deliver over the stock pipe it falls flat at upper rpms and gets to the point where rolling on any more throttle produces more noise but not a meaningful amount of additional power. The port timing, compression etc is different enough between the 200 and 220 that the torque pipe, which was originally designed for the 200, doesn't perform well across the entire rpm range. Because of this FMF only lists the KG-30 for the 220 which does increase power everywhere with considerably more punch from the lower midrange on up. They don't want to sell pipes that don't make more power everywhere. Now that's not to say the KG-35 is not usable on the 220. Depending on your riding conditions, style etc it might be just what you are looking for. I've ridden in the Calgary area enough times to know that the KG-30 rev pipe with proper jetting, 13:50 or 12:47 gearing and some modification to the air box lid works better for ME. The torque pipe doesn't make enough power at higher rpms for some of the longer loose uphill climbs. In the areas where you are plunking along in 1st to 3rd gear climbing over un-uniform rock formations and working to avoid a sudden surge of power that my through you off course the trq might be just what YOU'RE looking for. It's a personal choice that only you can make. If your pipe is physically smaller than your friends you have a trq pipe and your buddy a rev pipe (assuming you both have a KDX). Try your buddyâ€™s bike and compare it to yours. If you prefer the rev pipe you may be able to exchange yours with the dealer, after all the only pipe FMF lists for your bike is the KG-30 ;). Given your location with the trq pipe installed and the snorkel removed I'd try a 42 pilot jet, 140 main with the stock jet needle in the second from the top clip position. Be sure to do a plug reading at WOT to insure you arenâ€™t running lean. You can find instruction on the JustKDX web page under carb tuning. The Fatty, Burly and Gnarly pipe are all exactly the same profile but FMF has changed the name of the pipes over the last 2 or 3 years. The size is dependent on whether it's a rev pipe or a torque pipe not which name FMF is using this year. There's a pile of KDX owner is the Calgary area who own KDXs, chances are good youâ€™ll meet up with some on the trails. David [/QUOTE]

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