January 14, 200818 yr Why do trials bikes use straight pipes instead of a large chamber like on an MX bike?
January 14, 200818 yr Why do trials bikes use straight pipes instead of a large chamber like on an MX bike? The technology is the same, just tuned differently for torque. A longer large dia. headpipe, a mid box for expansion, and a muff. Hope that helps!
January 15, 200818 yr So, what if I put a trials pipe on a kx125? You'll have great throttle response and then it'll fall on it's face very quickly and refuse to rev. The area in the headpipe in a two-stroke from the edge of the piston out about 6 to 8 inches (and especially the first 4 inches) is very critical to how it runs. The KX and a Trials bike engines are quite different in this area. For instance (depending on the year KX) the KX has a power valve system consisting of a flapper valve, two rotating sub-port valves and a resonance chamber that directly affect the exhaust port volume, area and timing. A Trials engine doesn't use any of this, which is why the exhaust systems are designed to do much different things depending ion the use of the engine. Jon
January 16, 200818 yr You'll have great throttle response and then it'll fall on it's face very quickly and refuse to rev. The area in the headpipe in a two-stroke from the edge of the piston out about 6 to 8 inches (and especially the first 4 inches) is very critical to how it runs.Jon Lets just say, it would be sorta like Jon dating a 18 year old! Ha!
January 16, 200818 yr Lets just say, it would be sorta like Jon dating a 18 year old! Ha! I herd dat! Jon
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