Quote:
Originally Posted by Varn
Hi
Have you adjusted the mixture needles yet? The slide needles may have to be lowered as well. Is there a leak in one of the diaphragms
You mention that one cylinder runs hotter than the other. Have you synchronized the carbs throttle plates?
Was your bike one that came with two spark plugs per cylinder? Are both sets of ignition working? Have you tried advancing the timing?
Would also add that the starter enrichment (choke) might be leaking.
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mixture needles are as specified 2 1/4 turns, slide needle is non adjustable, no leaks in diaphrams, rear cylinder on almost all V-twins is hotter, thus the larger jetting of the rear cylinder, carbutetor are synchronized, starter inrichment OK, Ignition OK, changes to timeing do not change the over delivery of fuel. bike has much improved and very good performance except for fuel consumption.
The VT500 cooling system was enlarged by Honda in 1985 from 1.7 L to 2.0 L and a row was added to the radiator; which indicates that Honda knew there was a cooling problem. In 1986 the main jet for the rear cylinder carb was reduced from #122 to #120 most probably resulting from better cooling of the rear cylinder.
The cause of the fuel system problems is the stream lining which moved the carbs to the worst metered part of the fuel schedule. I am sure that if I removed the stream lining the fuel schedule problem would go away... as I have said I will be testing a smaller slow speed jet and a smaller rear cylinder main jet with improved cooling of the rear cylinder.
