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1979 GS 100 main jet question for correct or not

  • Thread starter Thread starter Rockgs1000
  • Start date Start date
R

Rockgs1000

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I took my vs26ss carbs apart to give them a good deep clean and rebuild. My bike ran well when I took it all apart and found the main jet numbers. I aside they are stage three since the bike has pod filters and 4 in to 1 Vance and Hines exhaust on it. The main jets read 127.5 on them with an R and square with another square in the lower left corner of the bigger square on the other side of the slot. I called dyno jet and they said it wasn't their jets for stage three. So here is my question does anyone know if these are the correct jets for the application they are in. I am not sure since the bike ran without backfire, black smoke, or surging when I rode it around the yard. It was difficult to start sometimes when it was cold but would start and run and idle well. Would appreciate which direction I need to go . Thanks
E9176B2C-D3E5-4446-B920-C1F8276D01DE-451-0000003F3282AF94_zps1439d900.jpg
 
127.5 mikuni jet is a 136 dynojet equivalent. my stage 3 GS1000 dyno kit came with 138 and 142 mains so it looks like they have used mikuni jets to get the jetting spot on with the dyno kit.
 
Thanks a bunvh saved me from spending an extra hundred bucks
 
i would check to see if the dynojet needles have been fitted.the PO may have just upped the mains and not bought the whole dyno kit.
but, if it runs ok then i wouldn't worry about it
 
Ok did that it reads 5DL36 hoping that matches what it should be
 
So do I need to get an entire stage three kit or can I get the needles? If I gotta get kit best one to get? Where would I find the info your providing? Sorry so many questions kinda new to carcarbb rebuilds
 
Rockgs1000 said:
So do I need to get an entire stage three kit or can I get the needles? If I gotta get kit best one to get? Where would I find the info your providing? Sorry so many questions kinda new to carcarbb rebuilds
Click to expand...

you can only buy a kit, not just the needles. they are readily available on ebay or other internet sources and there is only 1 stage 3 kit available for your bike so you cant go wrong.

i would ride it first and see how it runs, no point buying the kit if it runs ok as it is
 
I agree with run it as it is now and see what happens..my money os on its gonna be just fine. You can always richen it up a bit by smimming the needles with a .010 or .015 thick washer under each clip..and i mean with the clip in the center groove.

You can buy thin nylon washers and rub them on a flat file and basically make them any ending thickness you want, or you can move the clip down one notch also to richen it a tad.
 
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When I took the needle out it had a thick washer on top clip in top groove and a thin washer on bottom.
 
Put it back together as it came aprt and run it with NEW plugs..then take a look at the plugs. If you feel its too lean then move the entire assembly DOWN one clip spot and recheck.
 
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