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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Mods. To Yzf 250 Silencer=5 Hp
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[QUOTE="srv, post: 195353, member: 25553"] The magazine you guys need to get is the May 2001 issue of Dirt Bike as it has a 10 pipe shootout for the YZ 250F. Get a back issue just to see the dyno graphs. Unlike the 426F, the 250F does benefit from an after market exhaust system. Dirt Bike says, "Trust us, the YZ 250F can get even better". According to their dyno runs, the baseline 250F put out 34.1 horsepower. Dirt Bike ranked the pipes with report card grades: A, B-, C, etc. Pipes that brought home an "A": Dr. D @ 36.1 HP Pro Circuit T-4 @ 36.3 HP Pipes that brought home a "B": DSP SX @ 36 HP FMF Power Core IV MX @ 36.1 HP FMF Power Core IV SX @ 36.1 HP White Brothers E-Series @ 36.9 HP Yoshimura Pro Titanium @ 36.1 HP (..got a B+) Bringin' up the rear with a "C": Big Gun Race Series @ 34.5 HP DSP MX @ 36.1 HP White Brothers R-Series @ 37 HP Obviously the HP numbers don't tell the whole story otherwise the White Bro's R-Series would win hands down. Over at Thumpertalk.com, the 250F forum raves over the Dr. D pipe. Not only that, Gina of Dr. D Racing will give a 10% discount if you mention TT.com. To sum up, it looks like an after market pipe will gvie you between 2 to 3 HP. Another mod they rave about is the Vortex ignition; it's pricey though... [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Mods. To Yzf 250 Silencer=5 Hp
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