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Old 08-15-2014, 09:30 PM   #1
dutchbike OP
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Joined: Sep 2009
Location: Half Moon Bay, CA
Oddometer: 74
76 R90/6 carb adjustment with Dyna III ignition

Hi All,

After some basic cleaning and tune-up, my new-to-me r90/6 is now ridden almost daily (commute and errands). Only immediate thing is that it's running a little lean with cold starts (backfiring), which I suspect is due to clogging up of passage ways and possibly pilot jets. So I plan to thoroughly clean the carbs tomorrow, and after cleaning I plan to check adjustment and syncing of the carbs.

I was just reading up on how to adjust idle settings (haynes manual). This would involve pulling off a spark plug cap on one of the cylinders to adjust the other one. It also mentioned a warning that the electronic ignition of the later models don't respond well to this. Does anyone know how the Dyna III (Dynatek) ignition respond to this? What is the proper way to adjust the idle mixture and speed on these bikes.

If anyone knows of a good write-up or video on proper carb adjustment on these bikes, that would of course be much appreciated too! Thanks!
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