Bk Mod Question????

[BIRDDOG]

I performed the bk mod to my 2000 yz426f.It seems fine , giving it gas when idling , but when i ride it, it stalls alot in throttle on off on situations. What main jet has anyone tried and worked out well.
I only raised the needle 1 clip, the fuel spray is set around .50 sec,
and the fuel does not hit the slide when the throttle is applied.
I did not change the main. What size should i go to?
Thanks

 

[JB]

180

 

[JB]

oops, scratch the 180, it's 178

 

[wayneo426]

Bird Dog,
Im running a 168 Main / ELN needle w/ the BK down here on Long Island.

 

[eunos]

Can someone tell me what your talking about ?(please)

 

[Shaw520]

Eunos, The BK mod is an alteration to the accellerator pump arm, located on the carb. More throttle response can be found by shortening the squirt duration. Do a search on BK mod and you will find much info.

 

[wayneo426]

Best BK info

here is the most detailed advice you can find on the BK mod. Garrett went thru alot to post this stuff, and its all good.

BK MOD

 

[JB]

boy, did i screw that one up!!!! 168 is the main i'm running also.

 

[wayneo426]

Ahhh, 178, 168, whats the difference, its only jetting. :eek: