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550 Main Jet Assortment Prob.

  • Thread starter Thread starter REDDY
  • Start date Start date
R

REDDY

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What is going on with my carbs? I have 4 sets of carbs for a 550. NO set has 4 jets the same size. They range from 92.5 to 115. I need HELP from a 550 expert. Why the variation? Does the 550 have some weird prob? I repeat HELP!!!:confused:
 
You need to get a manual. The manual should list the correct jetting for your bike. Different models/years of 550 may have different jets, or previous owners of those carbs may have re-jetted due to intake/exhaust upgrades. If you have the stock airbox and exhaust on your bike, you need to verify the correct stock jet size and go with that.
 
550 jets

550 jets

I have a manual (clymers) and I know the what the jet size is supposed to be but I was struck by the variation. Is the variation just coincidence or is it a BEAVIS & BUTTHEAD thing? I may have 16 carbs off 16 different bikes, I dont know. One set has 3 different throttle plates! The weird thing is; when I got the bike I thought it ran great. Maybe the mech was just a GEENEIUS (NOT).
 
REDDY said:
What is going on with my carbs? I have 4 sets of carbs for a 550. NO set has 4 jets the same size. They range from 92.5 to 115. I need HELP from a 550 expert. Why the variation? Does the 550 have some weird prob? I repeat HELP!!!:confused:
Click to expand...

92.5 is the stock size. 40 is the stock pilot IIRC.
 
550 carbs

550 carbs

I just disected my fourth set of carbs. The two best looking sets had 92.5 jets in one and four. second had 115 and the third had 110. I think this may be stretching coincidence pretty far. I think I need some more HELP. Both sets came from ZOOKll. They may have been in the same shop at one time or another. I am going to PM ZOOKll to see what she knows. If any one can set me straight I would GREATLY appreciate all views.:confused:
 
ARe you running an airbox? Are you running the stock exhaust? If you answer yes to those questions, run 92.5 jets.

That's the end of the story. :-)
 
550 carbs

550 carbs

Well I am going to take your advice and relax. I certainly appreciate the help. I am new to M/C tuning and I want to get it right the first time.8-[
 
REDDY said:
Well I am going to take your advice and relax. I certainly appreciate the help. I am new to M/C tuning and I want to get it right the first time.8-[
Click to expand...

The bike will "run" with some really funky jets in it. but itwon't run well. There is a thread with "stock carb settings". I'll dig up the thread for you later. :-) But 92.5 is right for stock parts.

Don't worry, you will get it wrong the first few times. :-) That's what we're here for. I've done just about everything you can concieve of to a 1980 GS550E. That includes wrong things.
 
I just had a flashback to the first time I rebuilt the carbs on my VT700C Shadow......carbs all clean and pretty, everything back together, ready to put back on the bike.....

"Ummm, crap, where'd these two springs come from?"

SH*T!!!!!!!!

Three hours and a LOT of new swear words later, I had the bike running. This was with TWO manuals, on a clean workbench with fluorescent lighting.

Screw going for a test run, I needed beer!
 
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