new my v 4 stroke engine

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gbritnell

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Hi Tony,
Great start on your new engine. I have to ask this question. In the picture of your crank you show the thicker counterbalance side and a thinner opposite side. With my experience building engines I have found that the crank pin needs to be pinned or pressed well enough to prevent the two crank halves from twisting. With your thinner side it doesn't look like there's much press or pin room to hold it secure. Not a criticism but just an observation.
gbritnell
 

Diy89

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Nice! Gives me motivation to work on mine!
 

gbritnell

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Hi Tony,
Excellent work on your engine. It's really starting to look like a motorcycle engine. One thing I can tell you since building mine is that the carburetor needs to be insulated from the cylinder heads. Once the heads get hot they transfer the heat to the carb and it boils the gas out of the carb. (vapor lock) I kept having this problem with mine. It would start great and run for about a minute or so and then you could see the fuel being pushed back into the clear fuel line. After putting an insulator spacer at both ends of the manifold I can get about 3-4 minutes or running time.
gbritnell
 

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