What jet size when upjetting? By looker (Read 653 times)

[looker]

Hi guys and gals,
the inevitable mod may happen soon, replacement of the crappy steel exhaust to a stainless one, not primarily for performance, more for longer life. And to aid the engines breathing I may add a free flow filter, not the Uni type but a panel that goes in the standard airbox.

So I was wondering, is there a common jet size that people settle on after these mods? I know it will be trial and error and my scoot is a 125cc and most of you guys will be on the 150cc size, but it's something I had to ask.

I'm currently on a 108 and was thinking maybe 115, 120 & 125 jets would be the sizes to experiment with, or will I need bigger?

Mike

[sprocket]

I would start with a 112

[zugzug]

General rule of thumb is one size up per mod. I'm with the above poster with the 112 jet with a exhaust and freeflow replacement filter.

[looker]

Cheers guys
The closest I have to that at the moment is a 115, so I can get a 112 and still have the larger one in reserve if I need it.

Many thanks,

Mike

(hey Sprocket, my brakes feel really good now )