Hi Guys
Can someone tell me if I can use a monoblock carb for an m21 or any other carb, as the originals from 276 Amal are expensive, If you can dose anyone have the specs required for that carb

email (option): markbrob1@hotmail.com

M21 376 monobloc
Bore = 1 1/16"
Main jet = 250
Pilot jet = 30
Throttle valve = 376/5
Needle position = 2
Needle jet = .1065
Air cleaner = yes
Carb model 376/23

Hi Mark,

And this is the set up for the 1" bore 376,
as used on the later M20s,(NOT M21) to replace the 276:

Spec. 376/21

Choke 1 inch
Main jet 240
Pilot jet 25
Needle jet 106
Needle position 3
Throttle valve 5
Engine Type: 4 stroke
Fuel Type: petrol

On the M21 1 1/16" the needle jet is also 106.
Fread's finger slipped alittele..

Noam.

email (option): noam10@gmail.com

"Fread" ?? I think your finger slipped

My finger didn't slip,
.1065 is the size of the needle jet.