Joined
·
396 Posts
i know i dont have a 450 but i have a jet kit, not even sure what the guy jetted my bike to when he rebuilt the top end of my motor, but it is jetted and has an hmf with an exhaust snorkel and a intake snorkel, and even my bike coughes at high speeds, it is very rare that it does it now that the motor has been rebuilt when it does cough im like WTF is wrong with it now, but all in all i think it may have something to do with the wind or the weather somewhat, if it does cough at high speeds, does it cough at high rpms also? i know before my engine work was done it would cough out at high rpms and i had a 90 degree elbow pointing backwards and i went and got a 180 degree elbow and stuck it on and no more coughing out, you may try that just to see if that makes it stop at all or become less frequent