On dynojet website there is a jetkit made for the klx250s 2009, will it be OK for a 2007?

 

they're the same carb, it's the same kit renamed to make you all tingly when you see the "2009 KLX250S" reference next to it.

 

Kit #2152 not available yet.

 

Use #2206 instead.

 

I orderd the 09 kit last friday

 

the kits are slightly different if you look at what comes in the kit, the 09 comes with a slide spring as well. Can,t remember if the jets were the same

 

The KLX250s kit is very different than the KLX300 kit. Different needle, different jets, and they confirmed the need for a larger pilot by suggesting 3 turns out on the mixture screw.

 

the 300R kit if it is different than the new one for the street legal KLX would still be the one to get imo. the 250S one is probably a tamer version made for less emissions and less performance. the 300R is an off-road bike only and thus the kit is probably more performance oriented. the needle can't get any more tapered. jets can't be different as the holes in the carbs are the same. they can include anything they want but there's no doubt that the 300 carb and the 250S carb are the same carbs internally- a 34mm CV. the '09 just doesn't have the TPS anymore. don't know anything about the carb spring addition to the kitbut if you want to shorten your spring just cut a few coils off it. larger pilot is not required as you don't need to go 3 turns out on the fuel screw. I've done two rejets on an '06 and now my '09 and never switched the pilot. it's just marketing. if you've got the kit, post up some pics of the parts so we can compare.

 

They don't drill the slide bigger either. Why?

 

Their set-up is a bit different then what we can read here, of what most people do! (fuel screw 3 turns, no slide drill...) I did'nt buy the kit, I already bougth the kawa parts, I was just curious to see what mods they were proposing. Don't you think they tested the kit to make our bike more performant?