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CB500 Four 1976- some issues!
SteveD CB500K0:
Hi Tom.
I was thinking of you the other day as I was cleaning "Goldie".
You've made good job of that - only the custom-built sidepanels gave it away for me.
I'd make sure that the throttle cables aren't jamming too. Is the throttle stiff?
Runaway revs usually means that the slides aren't returning in the throttle bodies (ie sticking).
Is the bike still in Berkshire?
Steve
Bryanj:
500 forks badly need the steel mudguard as a fork brace, or an aftermarket equivalent
exelbyt:
--- Quote from: SteveD CB500F on April 25, 2016, 09:01:45 AM ---Hi Tom.
I was thinking of you the other day as I was cleaning "Goldie".
You've made good job of that - only the custom-built sidepanels gave it away for me.
I'd make sure that the throttle cables aren't jamming too. Is the throttle stiff?
Runaway revs usually means that the slides aren't returning in the throttle bodies (ie sticking).
Is the bike still in Berkshire?
Steve
--- End quote ---
Hi Steve,
I am not far away in Hampshire nr basingstoke. Throttle cables are new and lubed up. Carbs have been fully stripped and cleaned. I think now it may be time to take the head off and investigate further. I asked nick robinson (@nickrobinsons motorcycles) and he suggested the head gasket.
Also i am looking for classic ride out in the area if your know any?
exelbyt:
--- Quote from: Bryanj on April 25, 2016, 02:06:50 PM ---500 forks badly need the steel mudguard as a fork brace, or an aftermarket equivalent
--- End quote ---
Seems to be a common theme here - i will try adding a mud guard
Thanks for all the replies!
matthewmosse:
I had a weeping head gaskett for years, in my case I had no issues with tickover being high. I read somewhere that Honda cables are tefalon lined and may swell if oiled, but a remote fuel supply rigged up should give a clear view of if the carbs and cables are free to move their full range, and give access to try spraying something like wd40 onto the inlet tract to see if it highlights and inlet leaks, I personally suspect it is how the cables are routed from carb to twist grip or someting jamming against part of the carbs. I take it the choke is working normally.
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