Remove jet holder through drain plug?
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Fast Eddie
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I would have to disagree with that. If you look at a used needle under a magnifying glass it’s quite surprising how scored and damaged they look. How much the dimension has changed I couldn’t say, but given the precise nature of a needle, I cannot see how such damage has zero effect. And a scored needle is clearly going to chew up a new needle jet more quickly.
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Even if you could trim the hex to go through the hole, you’d never get a box spanner through.
It must be one of those situations where I saw the big plug and had an intention to fit or remove the jet holder through it and ended up imagining that I’d done it, all these years later.
Happens a lot with war stories!
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DevonNorton
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I've found using a 2.7mm drill bit as a gauge (which is a close match to the 0.106" jet size) works well when checking for needle jet wear.
Andy
Andy
Onder
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I always change both the needle and the jet. But I dont do it that often because I dont put on the mileage like I once did. The cost of the needle and jet isnt enough not to do both. If needle and jet replacement was all I had to worry about Id be quite happy!
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I find that worn needle jets waste petrol.
Wrong (low) needle height seizes engines.
Wrong (low) needle height seizes engines.
There were 2 different size main jet holders. I have 10 concentric carbs. In all but one the main/needle jet holder is ¼”w however one carb has a ½”unf head. Not much smaller and no guarantee that it is original amal jet holder as it came on a 2nd hand bike but it is a second size. It still could not of course be removed through the float bowl.
Ando
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