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Tell me more about needles

Posted: 04:03 am Apr 02 2015
by KDXXXX
I'm trying to clean up my KDX's jetting but I'm really struggling to achieve smooth power delivery throughout the rev range.
The bottom end power, according to me, is fine. I have never done a plug chop test to check the main jet, but I'm happy with the top-end power.

The big issue is the mid-range power delivery, it sucks balls!

Now my question is should I change the needle in order to achieve a smoother mid-range? Will I be able to fix the issue by changing pilot/main jets?

I know the bike is jetted too rich because after a long ride with lots of half throttle operation the bike spooges everywhere.
Currently I have a BFQ needle in the bike which I believe is quite a lean needle.
Also running a 38 pj, 152 mj and 1:40 2t mix riding at 4000 to 5000 ft

Re: Tell me more about needles

Posted: 02:07 pm Apr 02 2015
by Jaguar
Here's what needles Jeff Freddette recommends:
'89-'94 R1173N
'95- R1174K & 2AFKQ needle jet

but those are for riding at sea level. You would need even leaner.

Tell me more about needles

Posted: 05:02 am Apr 04 2015
by cornishwrecker220
200 or 220 ???

Re: Tell me more about needles

Posted: 04:16 am Apr 08 2015
by KDXXXX
Jaguar wrote:Here's what needles Jeff Freddette recommends:
'89-'94 R1173N
'95- R1174K & 2AFKQ needle jet

but those are for riding at sea level. You would need even leaner.
According to my knowledge, a R1174K is a BFQ needle.
cornishwrecker220 wrote:200 or 220 ???
Its a 2006 200

Re: Tell me more about needles

Posted: 08:11 am Apr 08 2015
by KDXohio
i have a R1173N in my 90 200