SOHC.co.uk Forums > CB500/550
I need a carb sync - Anyone in North London?
paulbaker1954:
--- Quote from: michtag on August 20, 2020, 03:14:06 PM ---
--- Quote from: paulbaker1954 on August 20, 2020, 08:50:40 AM ---
This was exactly the same as mine, I sprayed carb cleaner all over and didn’t show a leak but there must have been one there. I replaced the clips with thin stainless jubilee clips. Word of warning is not to over tighten the clips or there is a danger of the clips splitting the rubber.
I am convinced you have an air leak. One thing you can try is when bike is running get hold of the carbs and pull/push them up and down. Give em a really good waggle around
--- End quote ---
OK, that is good info, thank you Paul, I will definitely give it a try. One more question, what do your Jubilee clips look like?
cheers
--- End quote ---
You need 8mm narrow band stainless ones. I got mine from Inox Fasteners in Southampton
http://www.inoxbolt.co.uk/zen/index.php?main_page=index&cPath=475_498
http://
michtag:
--- Quote from: paulbaker1954 on August 21, 2020, 08:11:40 AM ---
You need 8mm narrow band stainless ones. I got mine from Inox Fasteners in Southampton
http://www.inoxbolt.co.uk/zen/index.php?main_page=index&cPath=475_498
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Thank you Paul, I have ordered mine! Keeping my fingers crossed it will be as simple as that.
Cheers
Michele
paulbaker1954:
--- Quote from: michtag on August 22, 2020, 04:58:16 PM ---
--- Quote from: paulbaker1954 on August 21, 2020, 08:11:40 AM ---
You need 8mm narrow band stainless ones. I got mine from Inox Fasteners in Southampton
http://www.inoxbolt.co.uk/zen/index.php?main_page=index&cPath=475_498
--- End quote ---
Thank you Paul, I have ordered mine! Keeping my fingers crossed it will be as simple as that.
Cheers
Michele
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REMEMBER DONT OVERTIGHTEN THEM IN CASE YOU SPLIT THE RUBBERS
michtag:
--- Quote from: paulbaker1954 on August 23, 2020, 09:06:57 AM ---
REMEMBER DONT OVERTIGHTEN THEM IN CASE YOU SPLIT THE RUBBERS
--- End quote ---
I'll be VERY careful :)
michtag:
Update:
So I have changed the boot clamps to very nice Jubilee clamps and tightened them carefully. They surely hold the rubber manifolds firmer, but I still have the same erratic behaviour, no noticeable change at all. As soon as the engine is warming up (1 or 2 minutes max) idle starts jumping a bit and then spikes to 3k...then down under 1k for no apparent reason. Throttle is responsive and there is no real hang if I blip it.
At this point I feel pretty confident it is not an air leak, so I will be tinkering with the advance mechanism springs, as an old post by Hondaman suggested weak springs (a common occurrence) could cause a similar behaviour.
At this point I would also be curious to swap my (original) coils with good working ones just to rule out they have anything to do with it, but I don't really want to buy new ones right now without the certainty I actually need them...
BTW I have tested mine with a voltmeter and they seem fine, but I wonder if they may start "acting up" once warm?
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