Question about 1984 Honda VT 500 C Shadow
Easy way to check if you're running too rich or too lean would be take out your spark plug after disconnecting coil and look at the colour of the sparking area.too dark/black means too much fuel in chamber.or likewise if it's greyish or too light in colour it is running too lean,a perfect fuel to air mix should be sandy in colour or lighting brown.also I have an en125 that did stop after prolonged engine revs and this was down to pin holes in the rubber diaphram,,,it sounds definitely like a fuel air mix problem but as another answer suggested it could also be a compression issue with air escaping from somewhere.you could buy a compression testing kit from halfords at no more than 20quid.chinese 125cc manual also well worth purchasing as it covers most problem solving issues again around £17.
Posted on Mar 04, 2015
Could be a couple of things. One, could be the carbs allowing too much fuel or dumping fuel to the engine. This will cause the plug to load up and the bike to stall. Two, it could be a weak spark such as a bad plug, improper gap of plug etc. I would try some little things. First, I would get new plug(s) and ensure they are gaped to factory spec. If that does not help, I would have the carbs rebuilt and or the ignition of the bike checked out.
Posted on May 26, 2011
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Posted on Jan 02, 2017
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