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Chriss217 |
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Robby Dirty Old Man
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jeffyjeff World Chat Champion
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Robby Dirty Old Man
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Robby |
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Robby Dirty Old Man
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Chriss217 |
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Robby |
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Robby Dirty Old Man
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Easy-X |
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Robby |
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Robby Dirty Old Man
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Posted: 16:48 - 06 May 2021 Post subject: |
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You can keep the carbs on the bank to avoid upsetting the balance. You'll need to remove the float bowls to get at the jets, and the tops to get at the needles and check the diaphragms, but the bodies can stay on the rail and you don't need to touch the balance adjusters.
It's a powerful bike, so low speed stuff will be relying on the idle circuit, small jets and the needle. Main jet only comes into play at full throttle, along with most of the needle. So I would be looking for a blockage in a narrow passage, making sure all the idle circuit (mixture) screws are set the same, and making sure all the needles are set the same.
If it has a fuel filter, worth changing that while you have access.
Any problem should be fairly obvious- a very clogged jet, or a lot of crud coming out of a passageway when you squirt carb cleaner in from the other end. Most bikes run surprisingly well with what looks like quite significant problems - partially blocked things, fairly big air leaks, that sort of thing.
If fiddling with the carbs doesn't sort it, then it's back to electricals. Cleaning up any earthing points and replacing the HT leads and plug caps is pretty much a service job on a 10 year old bike.
The wonderful world of fault diagnosis. It's nearly always a little bit of dirt or corrosion in the wrong place, or a minor break in an important wire. |
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Chriss217 |
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Chriss217 Derestricted Danger
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Posted: 14:39 - 20 May 2021 Post subject: Damm. I'm an idiot |
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Thanks Robby for the wasted spark comment. I had thought the 2 LT inputs (and ground) created independent sparks.
As a final check before stripping carb1, I swapped the HT leads 1&4 connected to the left coil. Checking header temps now showed exhaust 4 low.
I've no idea how I missed it when I swapped the coils over, but it now pretty clear that one of the coil outputs is faulty.
To check I will try replacing the coil. If anyone has a twin output Gill coil part 1290048 I would be grateful for a PM. ____________________ Have fun out there. |
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stinkwheel |
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stinkwheel Bovine Proctologist
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Posted: 15:41 - 20 May 2021 Post subject: |
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It's probably not the coil itself if it's sparking one one side of a twin output coil but not the other. Much more likely to be the HT lead or plug cap. You could try swapping those over where they attach to the coil and see if the problem moves with them. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Chriss217 |
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Chriss217 Derestricted Danger
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Chriss217 |
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stinkwheel |
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stinkwheel Bovine Proctologist
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Chriss217 |
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Chriss217 Derestricted Danger
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Old Thread Alert!
The last post was made 2 years, 331 days ago. Instead of replying here, would creating a new thread be more useful? |
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