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Dirt Bike Brands - Other
Yz444 Tuning: Building a Monster Torque Curve
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[QUOTE="Ol'89r, post: 825032, member: 17212"] Phil. If that's the case, you may want to look into getting a high performance cam, (torque grind.). By changing the stock cam too much from its intended settings it could make the bike hard to ride. By changing the lift and duration on the cam itself and maintaining close to stock degree settings, you should be able to increase power while maintaining stock curves. Tell the cam grinder what you want to do and they should be able to set you up. My experience in this comes from racing the old Triumph twin engines on flat track and TT. The Triumph is a twin cam engine and the cams are adjustable by broaching new keyways in the cam sprockets. On the TT, we set our engines up for max torque. TT tracks are similar to MX tracks in the way that you have short straight-aways and tight turns. Usually a jump or two with a short run to it coming out of a turn. Normally only one big turn and one long straight-away, so top end performance is not a big factor. The biggest factor was low end torque and good carburation coming off of the corners. We used the same engine for half mile and mile also. On the mile tracks we ran about 130 to 135 mph on the straight-aways and slowed down to 90 to 100 in the corners. So carburation was not a big factor since we ran a very high rpm and the engines never really fell off of the cam, (Power band), in the corners. Although we used the same engine for both types of racing they were set up completly different as far as cams, degreeing, port design, valve sizes, pipes, flywheel weight, balance factor, etc, etc. Good luck. :cool: Ol'89r [/QUOTE]
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Dirt Bike Brands - Other
Yz444 Tuning: Building a Monster Torque Curve
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