[mistakes]

hello all,

thanks for the help on my previous post. now that my exhaust is all sorted, it’s time to ride and of course that’s not going as well as planned either.

i have the amal mk1 kit from hitchcock’s and it idles really well, but it doesn’t want to take any throttle unless i’ve got the air mixture set very rich (about 1 out or less) and the needle in the richest position as well.

i’d seen a post about someone with the same carb kit mentioning they had to get a richer throttle cutaway, is that where i’m at? i’ve been operating under the assumption that all of the jetting etc should be correct, but i’ve seemed to have exhausted all other options. has anyone had the same issue/experience?

any help would be appreciated, thanks!

[Adrian II]

You have seen this, presumably?

https://amalcarb.co.uk/downloadfiles/amal/Mk1_Hints_and_Tips.pdf

A.

[mistakes]

lately i’ve seen that more often than my girlfriend

[allanfox]

If your needle is in the richest position you may be choking it and it won't take any throttle, the moving the clip up to the top of the needle to see what happens.  Mine was exactly the same and turned out to be way too rich, moving the needle now gives me a good mixture at about 2.5 turns out on the screw.

[mistakes]

wanted to provide an update just incase anybody else has a similar problem in the future and finds this thread.

my slide cutaway was not the problem, there was a problem with my fuel line and possibly a blockage somewhere, so the carb was not consistently getting fuel, which was why it would idle fine but inconsistently take throttle. sorted out now and running well. Had my hiccups with the Amal at first, but now it seems great !

[Bilgemaster]

Good you caught the fuel delivery issue. 'Cause honestly, with ALL the half-assed Amal Concentric setups I've nursed along, I've never had such issues. I understand they're supposed  to be finicky, but I guess I've just been lucky.

[Adrian II]

Good work. If it's not the Amal Premier version of the Mk1, consider treating it to a hard anodized or brass slide to slow down wear. The old set-up of zinc slides in zinc carb bodies would wear very quickly.

https://surreycycles.com/carburettors/mk-i-600-mk-1-900-concentric/

A.