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More Main Jet Questions

Steve L

CB750 Member
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I recently purchased a 1971 K1. I received 110 Main Jets with the rebuild kit. The bike had 110s in it and ran ok. The parts dealer says that the bike should have 140s. My K5 ran on 105 jets. I just put in 130 jets, but haven't taken the bike off of the lift yet to run. Does anyone know for sure what the K1 main jets should be?

I plan to put original Honda exhaust back on the bike, but all I could get are the HM B750, which has more back pressure than the HM300 pipes.
 
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