Do I have a DynoJet kit installed?

[mark_vaughn]

Basically wanting to figure out if I already have the parts installed.

The bike had some mods already when I got it and I am told it ran well when it was parked, I never saw it.

Has a 4-1 already, so it may have more mods... Want to make sure before I drop a few hundred on a dynojet kit.

[posplayr]

two ways to check, see if the needles that are installed have grooves to raise e and lower the needle. Take of the 4 screws on top of one of the carbs and you should be able to answer the question in 5 minutes with it back together in 10.

The other way is to pull a float bowel and look at the size of the main jet.

[1978GS1000custom]

the main jet will also have the letters D and J on it before the size

[mark_vaughn]

So I have 125 jets installed.

I will be running pods and a stock exhaust.

Any thoughts on if these jets will work? Don't want to be too lean.

[posplayr]

You can find the complete parts lists at the dynojet site. The 3133 is the one you would get.

Pods make the biggest difference interms of flow. The combination of 4:1 and pods will probably want you around 132 DJ mains.

http://www.dynojet.com/pdf/3133.pdf

The next thing to figure if you have Dyno jet mains or Mikuni mains. They are roughly related as below:

DJ = Mikuni+10

So if you have Mikuni 125's now then you are set for Pods and 4:1 already. If not then you will likely need to step it up. But sound like someone was already going some jetting problem now if to know what needles you have. Are the DJ?

[chef1366]

That's a good size main for those mods but what are the spark plugs telling you?
Get the Dynojet kit for the needle and drill the slide or you won't be happy with the pods.

[mark_vaughn]

I dont see any markings on the needle.

Any clearer explanation on how to tell the size of the needle?

[chef1366]

Is the needle tapered with notches where the clip and spacers go?
If not bite the bullet

[posplayr]

Mikuni jets



Dynojet needles (the ones with the grooves)