One cylinder runs cooler than other? |
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tubehead
Falcone Joined: 14 Dec 2016 Location: Australia Status: Offline Points: 39 |
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Posted: 21 Dec 2016 at 12:00 |
While waiting for my new regulator to arrive I decided to give the Ambo the once over and lucky I did as I found numerous loose fastners.
I also noticed the left hand cylinder is running cooler (80 degrees less on my heat gun pointed at the exhaust at the head exit) than the right at idle and puffs a little black smoke when I crack the throttle but cleans up once the revs rise. It has new Gilardoni piston/cylinders so I doubt it is due to low compression. I assume it is running a bit rich at idle on that cylinder so will have a look at the carbs next week. I also noticed the distributor cap retaining spring on one side is home made and allows the cap to move around a small amount.The bike seems to run fine like this but I was wondering if this might cause the spark to be weak or erratic as I can hear a slight miss in the left hand cylinder at idle? Edited by tubehead - 21 Dec 2016 at 12:05 |
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ranton_rambler
Senior Member Joined: 13 Feb 2015 Location: Stafford Status: Offline Points: 1147 |
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Rich mixture will make it run cooler as far as I know.
There's only 1 set of points in the distributor so any timing error would affect both sides. Sounds like it needs a good baseline tune-up - set tappets, set timing, set mixture and synchronise carbs.
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Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
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Bit lean go through the carb setting up had similar with the Vthou recently an hour cleaning and resetting the carbs had it sorted
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The Older i Get, The Better I Was
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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Don't be tempted to try to get the mixture screw settings the same number of turns out on both carb's.According to the manual, the right side runs a little richer than the left.I presume this is to compensate for the asymmetry of the inlet tracts.
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TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.
1971 V7 Special. 1972 850GT. 1970 T120 Bonnie. 2009 500 Bullet. |
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tubehead
Falcone Joined: 14 Dec 2016 Location: Australia Status: Offline Points: 39 |
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Thanks guys I will have a play and see what I can sort out.
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Asjc
Falcone Joined: 04 Oct 2015 Location: Herts Status: Offline Points: 86 |
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I had a similar problem on a v50 donkies years ago, turned out to be plug gap as I recall.
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