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Old 11-18-2012, 06:22 AM   #1 (permalink)
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SG-103 wants to know Dino or Syn?
RPMs not dropping quickly with SE StgIV

I have a 2012 SG with a SE StgIV package. It runs great but from day one the rpm has been slow to drop back down to idle. I've questioned my dealer service guy and he said it was normal with high compression. I had Dyno tuned at 1000 miles 108/112 with no dips in the curve. Any suggestions ???

Last edited by SG-103; 11-18-2012 at 06:53 AM. Reason: Misspelled
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Old 11-18-2012, 07:43 AM   #2 (permalink)
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dog155 wants to know Dino or Syn?
Normal with high compression that's a new one.Quite sure there is something going on with the tune.One of the members up on electronics should be able to set you straight.
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Old 11-18-2012, 08:38 AM   #3 (permalink)
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SG-103 wants to know Dino or Syn?
Kinda what I was thinking, they don't have a Dyno and send bikes out to be tuned at another shop. The a/f looked good varying 12.0-13.1 but I know that has nothing to do with the idling. Once it idles down it stays down but it's slow to fall every time. It was tuned using a SEPRT
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Old 11-18-2012, 11:14 AM   #4 (permalink)
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CVO Convertible wants to know Dino or Syn?
Isn't that a sign of lean A/F ratios? Or maybe it was tuned with an air leak present so the A/F ratios are good, but it decels slowly. Just random thoughts.

Last edited by CVO Convertible; 11-18-2012 at 11:22 AM.
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Old 11-18-2012, 12:00 PM   #5 (permalink)
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SG-103 wants to know Dino or Syn?
I'm not sure, I'm taking it to another shop with a Dyno to let them have a look at it, while I watch. I'm thinking that's a sign of being "lean" too ! I tried to restrict the intake to see if that would help, it didn't seem to, very little if any at idle.
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Old 11-25-2012, 09:24 PM   #6 (permalink)
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Sounds like a vacuum leak.
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