you will have to pull your carbs anyway to jet for the exhaust, so why not add the carbs...after attemping just once to get the airbox back on you will want them, trust me......plus pilot jets are not a common carried part., mains are no prob, but I went to 3 different shops looking for pilots.

 

not sure if you would want to monkey with the timing...these motors are already pretty high-strung as they are

 

look hear http://www.motorcyclecarbs.com/Keihi...11184305252954 they have them for $6.00 atfermarket of $7.00 factory

 

Nice link! Had to add that one to favs. I normally go through Sudco http://www.sudco.com/

 

sudco kicks ***, every jet for every carb you can think of.

 

i know im good once in a while

 

Dumb question, but where would I order the Cobra F1 system?
I went to a few websites, including cobrausa.com, and was not able to find any available.

 

try www.denniskirk.com or chapperal if your willing to take a trip.

 

socal, look into a muzzy system as well for your 250 www.muzzy.com

 

Make that www.muzzys.com with the s I have seen the muzzy for the ex250 on a google search for about 100$ less than on the muzzy site so search around. I dont think the cobra f1 are made anymore. You can find them on ebay once in awhile.