That was my rationale for getting the kit. I think, though the needle has a little different geometry than the N1TC. Probably not noticeable. Both are far better than the dumbed down one that is stock.

 

Did it change the sound when you drilled the 1/2" hole in the exhaust?
If yes, better or worse? lower the pitch or higher. Louder?

I want to do it but once there is a hole. Then there is a hole forever.

I was thinking about doing the list one at a time. Is there a suggested order I should follow. Are there any steps that Must be done together?

KLX250S owner, with 155 miles on the OD and lovin it!
Thanks!

 

The half inch hole in the exhaust changes the tone a wee bit- a bit of a bark- but its still pretty quiet. Having no snorkel in the airbox is way louder than having the 1/2" hole.

 

i am interested in doing this mod however i am not really sure what parts need to be removed and capped.

does anyone have a picture of what needs to be done?

thank you

 

See here. KLX300R and KLX250S 09 DJ needle. Very different. This bike loves a lot of gas up top on WOT. The 300R needle reflects this, the 09 250S doesn't.

 

can you pleaes give me more info on this? i have removed teh snorkel from the airbox, is this the same thing in a sence? sorry about my ignoarance, just dont want to F someting up.

any pics would be apprecited or must a marked up diagram. thanks

2) Drilled the crankcase vent hole at the lower front right hand corner of the airbox out to 3/8". Like the KLX300, this system is plugged up and enlarging the hole helps move air out of the crankcase. It also means oil has a clear shot at your airbox if you lay the bike over.

 

I did not see where you said that you cut out the screen backing out of the air filter holder. This is important too. It seems like it wouldn't make much difference, but it does. Remember, More air + More fuel= More HP =-)

 

Earlier postings to this thread mention drilling out the carb slide vent to 7/64ths in order to increase throttle response in older bikes. Later postings do not mention this modification. Is this mod not effective, or has Keihin taken care of it on the 2009 model ?

BCLS482, in Cowichan Bay, BC, Canada

green '09, full Muzzy exhaust, Dynojet stage 2, air box lid removed, backfire screen removed, 13t front sprocket.

 

I have the SF and was wondering about this mod to the slide too...

 

Take out the slide from the carb' (only requires you to remove the side panels and the tank and the carb' top,) and measure the vent hole. If a 7/64" bit wont slide through the vent, then drill it out so it will.