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R1 Carb Setup


James Devereux

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turn the idle screws all the way in and then out 2.5 turns. Make sure you have a fuel regulator on it for about 2.5-3 bar. check the floats are all equal and that the diaphragm are in good condition and not shriveled up. Pull choke and turn key. One running adjust the idle screws equally until smooth. Take to a rolling road and get them setup properly (Worth every Penny)

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Yup, bike carb pump should give you correct pressure.

The jet size is very individual and with no rhyme and reason most commonly 1.2 to 1.8 but only a rolling road can determine the absolute spot on size.

Like Keith said, worth every penny. Somewhere in the middle of those figures should make it run ok (if not hugely impressively)

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  • 2 weeks later...

1 ½ turns on the air fuel screw (out increases fuel)

caveat if screw is at back of the carb underneath effectively behind the throttle butterfly which all the bike carbs I have are.

if screw is at front of carb then out is lean

Edited by Snapperpaul
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