i have a z 250 and i wanted to remove the baffle and take off the lid to the airbox. The problem that im facing is that i dont know the correct jet size to put in after i do these modificatios, anyones help would be highly appreciated.

Thanx- Mike

 

What size jet does it have in it now?

 

After you figure that out let me know too. I'm looking to do the same thing.

 

tru that, I am lookin for some good mods to help me beat out a 300ex hopefully be able to run with an 400ex stock

 

Are you going to be installing an aftermarket Jet kit? Most aftermarket jet kits will give you the flexibility you need to do exactly what you described. I know Dynojet has a stage 1 kit available for the Z250 for around $60. I have to see or hear of it's increase in performance, but I would suspect atleast 5-7% increase of power through all gears. With the Yoshi slip-on, you can move that percentage up to around 10%, which in the Z's case would be a few (5-7) mph gain......just my $.02.

http://www.xroadsmotorsports.com

 

thanks for the help!!!

 

if im not mistaken...im pretty sure that u dont have to rejet after removing the airbox lid

 

yeah u do