My bike is running halfway decently now that I've fixed the stiff diaphragm problem that was causing the cylinders to run differently.

But ... I noticed that the carb slides have restrictors installed in the holes on their bottoms.  Which means that someone likely attempted a Dynojet install at some time in the past.  As for the carb needles, they appear to have multiple positions for the circlip instead of a single one. Does that indicate that they're non-stock (Dynojet or otherwise)?  Or did some GS500s come with multi-position needles as stock?

Jetting is 145/40, plugs are slightly sooty but not indicative of running very rich (not _covered_ with soot).  If I have the Dynojet needles, should I attempt to return to stock and remove the slide restrictors?

Thanks,
-b.

Quote from: bosozoku on June 23, 2007, 02:28:21 PM
My bike is running halfway decently now that I've fixed the stiff diaphragm problem that was causing the cylinders to run differently.

But ... I noticed that the carb slides have restrictors installed in the holes on their bottoms.  Which means that someone likely attempted a Dynojet install at some time in the past.  As for the carb needles, they appear to have multiple positions for the circlip instead of a single one. Does that indicate that they're non-stock (Dynojet or otherwise)?  Or did some GS500s come with multi-position needles as stock?

Jetting is 145/40, plugs are slightly sooty but not indicative of running very rich (not _covered_ with soot).  If I have the Dynojet needles, should I attempt to return to stock and remove the slide restrictors?

Thanks,
-b.

It indicates that they're not US stock needles. While they could be UK/Euro spec, since you have the plugs in the slides, I think DynoJet is a safe bet.

So, yeah, you're undoubtedly running rich at the top end at least. Some people have gotten the DJ kit to work and say they're satisfied, but a lot of folks have had problems. If it were me, I'd change it, if only so that I'd have comparable data from lots of others to work with.