The BSA A7-A10 Forum

Technical => Amal, Carburation => Topic started by: fearie on 04.07. 2020 15:23

Title: amal 389 does not fit a10 plunger 1951
Post by: fearie on 04.07. 2020 15:23
Hi!

as you can see in the pictures i have some fitting issues. Did anyone solve this problem before? I coulnd find anything with search option.

Title: Re: amal 389 does not fit a10 plunger 1951
Post by: RDfella on 04.07. 2020 16:02
You need to take the adjuster off and run the cable directly to the carb. Not a great design. Just been to my bike shed to look at my 389 to see if it had a flat top (which would help) but can't find it. Dunno where it could be.
Title: Re: amal 389 does not fit a10 plunger 1951
Post by: Swarfcut on 04.07. 2020 16:05
   The 389 carb is the bigger brother of the AMAL Monobloc 376, so not easy..  The smaller 376 will fit, but again it's a tight squeeze, here the top cable adjusters need to be substituted for plain collars as mentioned by RD to avoid the top frame tube. The plunger air filter connection has to be modified or simply discarded. Monobloc throttle adjuster screws can seize in the body, and shear off when you come to adjust the tickover.

 Best to stick with the earlier 276 remote float type for an easy life.

 Swarfy.
Title: Re: amal 389 does not fit a10 plunger 1951
Post by: a10gf on 04.07. 2020 16:24
Even a 276 is tight, had to remove everything possible at the cable entry.

Title: Re: amal 389 does not fit a10 plunger 1951
Post by: morris on 04.07. 2020 20:56
Similar issue came up a while ago.
https://www.a7a10.net/forum/index.php?topic=14453.msg120384#msg120384