This one used a 168 mj

 

Richard whats up over on your side of the planet my carburetor Brother
I read that, what made me not go too far with it was he said he used a
28 pilot and the smallest one I could find by keihin was a 35
I have a 45 pilot and a 168 main with a dvr needle so i thought while I am waiting on jets and needles give it a try. (nada) super lean down low 1/4 to 1/2 throttle and at wot under a load it got stupid and went rich 8.7 to 9.3 air fuel ratio.
On the dr650's we set up we use a fcr 39 and the jetting is 155M 38P emp needle 4 clip they are bad *** on that bike.
on the 250 I have a 155M 52P emp needle and about 1.5 turns out on the slow air from 1/4 throttle to 1/2 throttle leaner than I would like I am going to try a emn needle and see if I can rich en up the bottom to about 12.8
not under a load
Peace be with you and tune on
Bill

 

still running too rich with 155M
I will switch out the 155M with a 150M and test again

 

I might have it for this temp 48f
went down on the main to 150
went down on pilot to a 50
slow air jet 1.5 turns out
needle emp on third clip

 

Last test ride for the day
looks like for this temp 48f I have arrived
I can see when it hits 90f
I will have to change the main to a 148
and the pilot to a 48 to keep it in tune

 

well there it is from the start to finish from real life garage
bike runs great
big upgrade from the stock carb
now On to the next project
if any of you want to do this carb swap and need info
feel free to let me know I will help in any way I can.
Merry Christmas
Bill 113moto

 

Bill -
Thanks for the thread. Good stuff here so I linked it up in the FAQs.

Merry Christmas!

 

Here is a update on the install
Because of the weather I have not been able to go out and
ride and do final tuning
But the bike has been setting for weeks and it starts right up
even with out a choke
I start it up about every 2 weeks
all you have to do is twist the throttle a couple of times
to give it a squirt hit the button and she fires right up.