quckshot question

[DANZICK YZ450]

Ive got a yz450f when i bought it the guy had already put a boysen quick shot on it. ive heard it makes them run worse and ive also heard it makes them have more low end. Anyone know for sure?

[Toast]

It won't give the bike more low end. And in my experience, it doesn't make the bike run worse.

The only thing it really does is increase throttle response.

[copsey]

If setup correctly it will help the bikes throttle response like Toast said. Peronally I think it's a nice short cut if you don't have or want to spend the time to setup the AP timing.

[DANZICK YZ450]

oh and By low end i meant throttle response. And i got a friend that doesnt have the accelerator pump cover and his respones is better. but he has an Athena 480 Big Bore kit on it which gave it incredible torque.