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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Float level front carb.
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<blockquote data-quote="billirwinnz" data-source="post: 174580" data-attributes="member: 1697"><p>Hi Vincent</p><p></p><p>I've spent hours fiddling with float heights on my bike. Originally the front level was far too low and the small amount of fuel would vaporise whenever I stopped for gas. I discovered later that my carbs hadn't been given the Jeff Smith pilot jet modification which didn't help. I've also had issues with the rear float level being too high. The new replica Amal carbs have nylon floats which are heavier and the float level is too high. I see on their website that the correct float height for type 6 carbs is 1-5/16" below the top of the float bowl but even by fitting lighter floats I've never been able to get it as low. On the old brass bowl float chambers the level sits lower.</p><p></p><p>As far as the front carb goes I can only suggest trial and error. I run my front carb tilted down at the feed end so that I can run a decent amount of fuel in the chamber without it flooding into the motor. By rotating the bowl it's easy enough to experiment with different float heights. I haven't measured mine since I got it right but it depends on the angle of the carb too.</p><p></p><p>Good luck!</p><p></p><p>Cheers Bill</p></blockquote><p></p>
[QUOTE="billirwinnz, post: 174580, member: 1697"] Hi Vincent I've spent hours fiddling with float heights on my bike. Originally the front level was far too low and the small amount of fuel would vaporise whenever I stopped for gas. I discovered later that my carbs hadn't been given the Jeff Smith pilot jet modification which didn't help. I've also had issues with the rear float level being too high. The new replica Amal carbs have nylon floats which are heavier and the float level is too high. I see on their website that the correct float height for type 6 carbs is 1-5/16" below the top of the float bowl but even by fitting lighter floats I've never been able to get it as low. On the old brass bowl float chambers the level sits lower. As far as the front carb goes I can only suggest trial and error. I run my front carb tilted down at the feed end so that I can run a decent amount of fuel in the chamber without it flooding into the motor. By rotating the bowl it's easy enough to experiment with different float heights. I haven't measured mine since I got it right but it depends on the angle of the carb too. Good luck! Cheers Bill [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Float level front carb.
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