Re: Slip-on & exhaust valve
With a slip on or half system, you keep the exhaust valve. With a full system install, you loose the exhaust valve. The bennifets to not having an exhaust valve are more HP at the top end, one less thing to adjust, less weight, and sometimes they rattle. The HTEV does provide backpressure at low rpms wich increases torque at slow speeds. Usualy, if you get a full system, and drop down a tooth in the front sprocket, you wont notice the slight power loss at arround 3K rpm.