Just a quick question for a partner. He has a Big Gun full race pipe. He set the jetting according to dyno jet's instructions and his low end isn't what he expected his top end is fine. Is there any other jetting combinations that are a good starting point or a point to change to. I couldn't help much I'm running a Trinity.

 

What alitude is he at and any other mods ???

I should be able to help !!!!

 

He ride the california areas 0 to 4000 feet. I'm trying to help get him in the ball park. Thanks for the help.

 

I ride @ about 2000 - 3000 feet so I should be close. The stock main jet in Canada was a 155 (don't know if stock size is the same in the US). After installing my Big Gun I went up to a 170 or 175 main and left the needle in the stock position. If he goes to a carb mount filter you will need more main yet, probably like a 185 and maybe move the needle as well down 1 notch.

Hope this helps

 

i have a big gun race system, and with the old stock carb with carb mounted k&n, i ran the 195 mj and needle clip in the 3rd position and air screw 2 1/2 turns out and it ran awesome