82 GS1100 GK. Stock pilot jets. One size up on the main jets. Delkevic 4 into 1 exhaust with the center baffle removed. Bike idles perfectly and runs great overall. However, it has a flat spot in the midrange under acceleration. I read somewhere here on an old thread that 4 into 1's can do this. Is that so? And if so, can it be eliminated by raising / lowering the needles? Also, how would I know which way to go if so?
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4 into 1 Exhaust and Flat Spots
- Thread starter danny01975
- Start date
I did not! I read the service manual for carb sync and I believe the middle two should be different from the outer two. Not sure if it’s higher or lower as it just says the balls should be just below the midline on the special vacuum tool.
I didn’t know they needed to be the same. Will give that a shot. Along with the above listed comment about feathering the enrichener.
I did read that in the carb rebuild guide I found here. How do you know how much to reduce it? By how many tenths of a mm should I step down each time?
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