i have a nice bit of port work done to my cylinders so i would really like to keep them
do you think i'll feel a big decrease in power going from a 0.80 bore to stock bore?
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You might see a power increase...at .080 over you might be running a little hot. With a stock bore you will run cooler and be more efficent. Just a thought.
the choke circuit might not be working properly, or your reeds are weak. your rings could be wore not creating enough vacuum to pull enough fuel when cold. It could just be a cold hearted bitch...
is your timing advanced? mine was missing and laying down on top when the timing was at 7-8 degrees. backed it to 4 degrees no more problems. what type of fuel are you using?