Dieseling ???
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Seasoned HDF Member
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From: almost there
I have been using pure gas at 90 octane and premium with a shot of startron. I was wondering if I might have carbon build up causing hot spots. Thought Id try the old trick of getting the engine up to operating temp and then spraying cold water into the carb to break up carbon deposits..??
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From: la la land jerzey
the shelf on the heads combustion chamber has hot spots and the mix screw is probly rich
and if you are north of 9.5 to 1 this is going to happen -- better fuel can and does help as was said above
and if you are north of 9.5 to 1 this is going to happen -- better fuel can and does help as was said above
Seasoned HDF Member
Joined: Nov 2006
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From: la la land jerzey
I have been using pure gas at 90 octane and premium with a shot of startron. I was wondering if I might have carbon build up causing hot spots. Thought Id try the old trick of getting the engine up to operating temp and then spraying cold water into the carb to break up carbon deposits..??
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Seasoned HDF Member
Joined: Sep 2012
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From: almost there
Thanks John, I have 10.1 and have been running too rich for a while now. I just reduced main jet dn to a 72 today so ought to be running a little leaner now. Running damn good now for sure.
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Seasoned HDF Member
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From: almost there
Startron is just to neutralize the ethanol, so stop using startron? Why would it make dieseling?
Last edited by aces&8s; Apr 13, 2014 at 08:43 PM.
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From: almost there
I just pulled my front plug, here is the pictures. One side is tan and the other side is darker.? Looks to have the right shade of tan.
Last edited by aces&8s; Apr 13, 2014 at 08:49 PM.
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You can't read plugs anymore with this ethanol crap... my bike has the PERFECT amount of decel pop, no surging on decel, no coughing or spitting once warmed up, no pinging, but the front insulator only shows one spot with a little tan on it... no black spots or ***** of aluminum.
My bike is running stock compression, but if it's really hot after a good run, it will diesel. Out of 10 shutdowns, it will do it 2/10 times... I'm not really worried about it. I've run 93, 89... it seems that it didn't start doing it until I put in 89, but at stock compression, with a v-thunder 3010, it shouldn't need 91/93 octane.
My bike is running stock compression, but if it's really hot after a good run, it will diesel. Out of 10 shutdowns, it will do it 2/10 times... I'm not really worried about it. I've run 93, 89... it seems that it didn't start doing it until I put in 89, but at stock compression, with a v-thunder 3010, it shouldn't need 91/93 octane.
