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colortune

  • Thread starter Thread starter dennis
  • Start date Start date
Yes. They seem to work O.K. with VM carbs, not so much with CV carbs. A carbtune, OTOH, is great.
 
Recently tuned my GS 850 (VM carbs) with one and found it invaluable, I had to set the fuel needles and air screws after a total strip and clean.I pre-set the air screws to 2 turns (a guess) and did all the adjustment on the fuel needles, would have been real fun and games without the colortune. Balanced them with a home made manometer and the bike's running like a dream. Now a real fan of colortune!
Colin
 
Yes, if you have VM carbs, which were on virtually all GS models up to 1979. In 1980 they went to CV carbs, which do not respond very well to the colortune.
 
The Colortune is a fantastic tool for getting the idle screws on VM carbs into the ballpark very quickly. And the flames are sooooo purrrty...

Final fine-tuning is based more on the bike's behavior -- throttle response, idle drop, etc.
 
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