SOHC.co.uk Forums > CB750

engine won't run off of choke

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rookie:
Hi all, I'm new to the board and new to Hondas. I've been looking for a bike for awhile and just got a deal I couldn't refuse and picked up my 1978 750K on Saturday. It hasn't been rode since 1979 and only has 566 miles on it. (That isn't a misprint!!). This thing is a time capsule. Now I'm trying to get it back in riding condition. I put new plugs in it, the oil has been changed, I took the bowls off of the carbs and cleaned them out and basically cleaned up the carbs the best I could without totally diassembling them. I got it started. The problem is when I turn the choke off it dies immediately. I can't keep it running without a choke. I am kind of leaning towards ignition problems. Any suggestions? Note: I checked the temperature of the pipes with a thermometer right after it was shutoff. #1 was 165, #2,3 and 4 were 105 deg F.

Post edited by: rookie, at: 2006/08/01 01:45

JonnyB:
Wow, not even run in yet, take it easy.

I would get the carbs balanced, most poor running problems can be traced to the carbs.

And of course check the valves and points gaps

SteveD CB500K0:
If it won't run off choke then it must be running really lean (too much air or too little fuel.  My guess is clogged jets starving the engine unless you block the airflow with the choke.

You will have to disassemble the carbs and clean the jets, which is not really surprising after all those years.

John - it shows you as a visitor. Have you quit??

Post edited by: SteveD CB500F, at: 2006/08/01 12:24

JonnyB:

--- Quote ---John - it shows you as a visitor. Have you quit??

Post edited by: SteveD CB500F, at: 2006/08/01 12:24
--- End quote ---


The site got hacked last week, and I had a few problems, managed to save everyone s accoutn except mine :(

jimshea:
Rookie,
Welcome.
Sounds like carbs, definitely not ignition... where are you based? UK or not??
Jim.

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