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Found my air mixture screws, '83 650 Kat

  • Thread starter Thread starter repoman
  • Start date Start date
R

repoman

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I have stock jets in my carbs with stock air box along with 4 into 1 exhaust. My plugs are white and I believe I need to go up one jet size, or can I max out my air mixture screws on the carbs?

Thanks
 
Maxing out the pilot mixture screws will only have effect in the lower rpm ranges. A richer main will help but the needles need help too. You can try shimming them but the taper is the bigger problem with stock needles.
 
With a 4-into-1 pipe, you will need to go up more than just one jet size. Probably three, but reading the plugs is the only real way to tell. Prepare yourself for getting the carbs off and back on the bike MANY times trying to get the jetting right.

After it's all said and done, you won't have that much more power, so you're gonna have to ask yourself, "was it all really worth it to go to pods?" :-k

.
 
Save the hastle and get a Dynojet kit... It will take you from Stage one thru three, incase you go to pods later (i recommend sticking with the airbox..)
 
I don't really care if you run pods or not. I just get tired of people saying it is such a pita and can't be done for the bike to run dead on.
:rolleyes:
 
What do you use for needle shims? Or can you order them? I will try shimming first as I do not have to take the carbs off to try them.

Thanks
 
Go to a Radio Shack and get the assorted small washers. Find the washers that are the same size as the one on top of the needle spring.
Take off the plastic spacer over the clip on the needle. Notice how much needle is sticking out the top of the spacer. Replace the spacer with the same length of washers. Remove two off the top and that will raise (richen) the needle one notch. I would start with removing one washer.
 
Last edited:
TheCafeKid said:
Save the hastle and get a Dynojet kit... It will take you from Stage one thru three, incase you go to pods later (i recommend sticking with the airbox..)
Click to expand...

I agree with the Dynojet kit.......but as far as the PODS goes, I can definately see the difference with them on my 550EF!! I'm pulling the front end off the ground now and this Demon is alive...........
 
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