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jet size

  • Thread starter Thread starter Gs1100e82
  • Start date Start date
Contrary to popular belief, it works from the idle circuit through about 2/3-3/4 throttle. It works to combine with the needle jet and most of the way through the main jets.
 
Gs1100e82 said:
hey guys, own a 1982 gs1100ez and it has a vance and hines race 4 into 1 pipe, and i just bought k&n individual pods for it. i also just purchased a factory pro
3.0 kit for the carbs to be rejected. the kit came with 130 and 132.5 main jets
i put in the 132.5 jets and the bike is still getting flat between 7-9k. i set the float heights to 22.4mm. the low and midrange is in my eyes perfect. smooth and powerful. i had already also synchronized the carbs. i pulled a spark plug and it looks lean for sure. i called factory pro and they said i may need a bigger main jet size. so he is going to send me the next two sizes up for free. at least they seem to be taking care of me on that but from what i have read on here it seems everyone has been good with running around 125s in their bike. any ideas?
Click to expand...

This really makes me wonder why in the world someone would buy a FP jet kit for a GS1100E?
  • First off almost nobody uses them,
  • Second the DJ kit is a known quantity and can be set very close just knowing a few parameters.
  • Third I cant believe the range of mains you are having to use on a stock bike.
  • Fourth, I cant believe that FP cant dial you in closer for a bone stock bike with pods/4:1


I suggest you just go buy a DJ kit and put in the DJ138/MK47.5/middle clip and call us in the morning. Be done with all of this. If that doesn't work you have something else wrong.

Here is another guy having jetting issues, followed the same advice and had it all sorted within a day for following the recommendations. How is your bike and different except you are using FP needles?

http://www.thegsresources.com/_forum/showthread.php?t=221653


Your bike might run better with FP needles but how are you ever going to know if you cant get it to run right. The whole point of the jet kit is that someone already ran a WB02 on a dyno and jetted a specific configuration (within limits), how wide these limits are!!!
 
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I bought that jet kit because i was told by a local shop here that has built a few gs1100's and 1150's and they said that they usually are the better kit (run the best all around) and that dyno jet is good too but they like the factory pro kit. this is my first time doing anything with carbs and im learning as i go just as everyone has at some point or another. i will let everyone know when i get the bigger jets in how it feels. im getting closer to where it needs to be.
 
today was a good day. i got my new jets in the mail yesterday and installed them. i installed the 142.5 jets in. tested it out today and boom I've got great power up top. better then ever before. great midrange and idle as well. i have to say factory pro was very good to stand behind their product. they sent me the last four sizes up for free at 4.95 each thats not bad. i also looked at what came out of the carbs again. they were "118s" but on the "needle side" the needle did not go inside. the taper was right at the tip unlike the jets i got from factory pro where the needle goes inside the jet a tiny bit before the taper. also the 118 hole looks about as big as the 130 i got from factory pro. I'm gonna say whichever kit was in my carbs before was something funky for sure. anyone have any ideas?
 
jets.jpg
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hopefully the pictures are good enough to tell what I'm trying to explain.
 
Glad to here you got it sorted out. What clip position are you running? It's been awhile, but I think I ended up either the middle slot or one below it. I would have to check, but I remember 4 - 4.5 turns out on the pilot screws.
Does the needle ever make contact with the top of the jet? I'm thinking not.
 
Tom R said:
Glad to here you got it sorted out. What clip position are you running? It's been awhile, but I think I ended up either the middle slot or one below it. I would have to check, but I remember 4 - 4.5 turns out on the pilot screws.
Does the needle ever make contact with the top of the jet? I'm thinking not.
Click to expand...
Yes.
It would be useful to anybody else if you go back and edit your firt post with a final configuration. and summary conclusions.
 
of course i would love to put a wideband on my bike to truly make sure, but what i have right now is, clip position 3 (middle). 142.5 main jet. 50 pilot jet. 2 1/2 turns out on the mixture screw. as of right now i have only gone probably 50 miles so im still keeping my eyes on it all.
 
yea it idles fine, i ordered those 47.5 jets and just got them yesterday. again now confused. the "50" jets they sent with the kit did not have the holes on the side where as the 47.5 does. should i be still def running the 47.5 jets? it idles with no problem and runs fine. also good question i feel like now that i have good power up top i feel like the bike really really wakes up around 5 1/2 to 6k rpm and pulls like hell. does this sound right?
 
final update,
factory pro 3.0 kit.....sorta
142.5 main jets
50 pilot jet
needle set at 4th clip position if counting from the top (aka raised up one)
mixture screw set at 2 turns out
bike makes smooth power now and pulls like hell. it was a pain but factory pro was a great company to deal with as they sent all other jets for free. even shipping. now the bike feels better than ever.
 
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