Yoshimura RS-3 slip-on or HMF perf. series slip-on ?

[RandyFer]

Will i have to rejet if i buy one of these and a k & n filter ? Do i have to change both pilot and main jets or just the main jet ? which jets should i use ? Sorry for all the questions. I really don't know much about changing/modiying things on my atv but i'm really looking forward to learn.

 

[alex456123]

You need to change both jets to run a filter and new pipe.

 

[lbjamm]

You might be able to "get away with" just changing the main. I still run the stock pilot with about 2 1/4 turns on the screw.

 

[alex456123]

stock pilot is lean on a stock motor, i would replace it with a size up or two

 

[lbjamm]

Yeah, that would be best.

 

[Satyrisci]

You should re-jet even if you don't increase the airflow. To cheaply increase the airflow, You can rip the restrictor out of the muffler and cut the box, and you'll really want to re-jet then. Put on a top shelf slip-on, a K&N, and it won't even run right. So, yes. Is the answer to the question.

 

[alex456123]

You should re-jet even if you don't increase the airflow. To cheaply increase the airflow, You can rip the restrictor out of the muffler and cut the box, and you'll really want to re-jet then. Put on a top shelf slip-on, a K&N, and it won't even run right. So, yes. Is the answer to the question.

said well my freind, said well.