Dyno jet installed, a little lag though, need a little help

makaveli2502 · February 16, 2007, 01:08:24 PM

i just installed a dynojet kit on my bike, along with a k&n air filter in stock air box. it idles great revs up nicely, but when i'm riding between 5000 and 6000 rpm it hesitates and i lose a lot of power, can anyone help me on what this may be caused from and what i could do?

thanks

Jarrett · February 16, 2007, 01:54:59 PM

Did you shim the needles?

makaveli2502 · February 16, 2007, 02:05:46 PM

what does shim the needles mean?

Jarrett · February 16, 2007, 02:15:29 PM

First, lets back track. If your bike was made prior to year 2001, then it's recommended that you shim your needles. If that is the case, do a search for "needle shimming" or "rejet" and find a thread with pictures and details. It's quick and easy to do, and it will richen your midrange. It's been covered extensively on this site.

makaveli2502 · February 16, 2007, 02:26:14 PM

i have a 2005

blue05twin · February 16, 2007, 02:54:05 PM

How did you rejet your bike? Pilot? Mid? Mains?

I belive the Dynojet kit comes in stages? stage 1 , 2 ,3? Which one did you do?

makaveli2502 · February 16, 2007, 03:04:21 PM

stage 1

makaveli2502 · February 16, 2007, 10:59:32 PM

2005 gs500f with a k&n filter put in stock air box and a stage 1 jet kit (dynojet) with 3 turns out on fuel plug screw 2 washers under e-clip. e-clip is 3 notches from bottom on the dynojet needle they provided, replaced the main jet and pilot jet as instructions said, still not sure what i did wrong, but engine chokes between 5000 and 6000 rpms. anyone?

Mr Hyde · February 17, 2007, 04:40:08 AM

Mine has the same issue and same setup ( even same year).. I was thinking it was the needed clip needed to move.. but since the airbox was coming out this winter i didnt bother.. I was thinking one more notch on the needle should do it.. my $0.02 - taxes.. for what its worth

rob1bike · February 17, 2007, 05:13:28 AM

Did you replace the mid main ? Does that even come in th dj kit? I've got a 2001 with a lunch box and wilyeco pipe. I'm running 22.5 pilots, 65 mids, and 150 mains. 3 washers I think, maybe 2. About 3 turns on the mixture screws.
Now I don't know how those number cross with the dj stuff cause they use a totally different system. My bike jams!
You have a stock pipe? I've been told over and over that dj is crap for the gs, so I went with what guys here suggested and its spot on.
Your mixture screws aren't the problem, once you crack open the throttle, you bypass them. It won't be your pilots, its either mids, mains or needle. The dj needle has a different shape than the stock length so you won't get the same results with the same number of washers as me cause I've got stock needles.
Throttle position and not rpm dictate which throttle circuit is being used......1/4, 1/2,3/4, etc.
Try this link and see if it helps. Good luck!

http://www.motorcyclecruiser.com/tech/motorcycle_jet_kits_carburetion/

I found that to be helpful!

makaveli2502 · February 17, 2007, 01:30:57 PM

ok.. so i took out/lost the washers when i took out the needle and put that stock white donut instead of the washers, around 3000 rpm it just chokes really bad, but when i have it in neutral it revs up fine. what could it be?

rob1bike · February 17, 2007, 01:51:47 PM

Are you mixing a stock needle with the dj needle?

makaveli2502 · February 17, 2007, 02:58:19 PM

no its the DJ needle they gave me. i need to know what washers and how many washers under the eclip i need. is there any specific size washers i need? do i need the white donut that was on he stock needle? i only replaced the pilot jet and the jet under (not physically under, as in beneath the tall jet) there are 3 jet lookin things i replaced the pilot and the other one is a smaller jet (under the tall main jet)

<a href="http://photobucket.com" target="_blank"><img src="http://i84.photobucket.com/albums/k19/suzukigsf05/jetkit.jpg" border="0" alt="Photobucket - Video and Image Hosting"></a>

thats the pic of what dynojet has..

<a href="http://photobucket.com" target="_blank"><img src="http://i84.photobucket.com/albums/k19/suzukigsf05/instr.jpg" border="0" alt="Photobucket - Video and Image Hosting"></a>

those are the instructions

<a href="http://photobucket.com" target="_blank"><img src="http://i84.photobucket.com/albums/k19/suzukigsf05/jetkit-1.jpg" border="0" alt="Photobucket - Video and Image Hosting"></a>

and thats all the jet kit came with.. expect only 2 needles, 2 springs, 2 eclips.. so is it missing anything? where do yall think the problem is? can anyone explain what i need to do?

makaveli2502 · February 17, 2007, 03:01:00 PM

no its the DJ needle they gave me. i need to know what washers and how many washers under the eclip i need. is there any specific size washers i need? do i need the white donut that was on he stock needle? i only replaced the pilot jet and the jet under (not physically under, as in beneath the tall jet) there are 3 jet lookin things i replaced the pilot and the other one is a smaller jet (under the tall main jet)

did it like that.. well i'm missing washers.. could that be the problem?

those are the instructions

and thats all the jet kit came with.. expect only 2 needles, 2 springs, 2 eclips.. so is it missing anything? where do yall think the problem is? can anyone explain what i need to do?

Gisser · February 17, 2007, 04:40:50 PM

Quote from: makaveli2502 on February 17, 2007, 03:01:00 PM

those are the instructions

Follow the instructions. You need all the stock washers on the jet needle--including the donut--and set the e-clip 4 from the top.

Main jet--don't mess with the beneath main jet. Change the tall main jet with the DJ124. You're telling us you changed the wrong jet.

rob1bike · February 17, 2007, 05:37:18 PM

Toss the dj stuff and go to the wiki site, look in the jet matrix for your bike, go to your local shop, spend 25 bucks on the correct jets and bam! Its fixed!

makaveli2502 · February 17, 2007, 05:44:15 PM

lol that sucks i just spent 85 dollars on the DJ's haha n ur sayin toss it? u sure

makaveli2502 · February 17, 2007, 06:05:03 PM

but will the dj 124 jet fit in the main jet, i mean look how big the main jet is and tall

makaveli2502 · February 17, 2007, 06:06:33 PM

wow the instructions they printed out and sent me from dynojet says that the jet beneath the main jet is the main jet, thats what its pointing to anyway (the jet under the tall jet)

Jarrett · February 17, 2007, 06:39:01 PM

When I get to a point where I don't know whats wrong with something that should be working, I tear it apart, and put it back together one step at a time. My guess is that you don't have the jets installed properly, or you don't have a good vaccume seal on your diaphragm.

If your top speed is around 65-75mph in sixth gear, and you don't have any power past 6k or 7k RPM, you have a bad seal on your diaphragm, and you need to re-seat your diaphragm cover assy. A good way to check is to stick your finger in the carb and lift the valve piston with the cover assy in place. Let it fall and listen for the sound it makes. You should hear the vaccume, and it should slowly fall. If you just hear a whooosh! and it free falls, you know that you don't have a proper vaccume.

http://www.ronayers.com/fiche/300_0366/carburetor_model_k4/carburetor_model_k4.cfm?man=su&groupid=3210&parent=3200

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Dyno jet installed, a little lag though, need a little help