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Dear Gene. about your query about fitting of MK 11 Amal.
Firstly my bike is 1970 750 .Fitted with Boyer Ignition and
Electronic Regulator,belt primary drive, high output
alternator, oil filter conversion, and oil cooler radiator.It
has done 70,000 km.The motor has had only a top end overhaul,
the bottom end us unopened and original.The bike is used for
weekly club outings of about 200km on a year round basis, its
pretty reliable.I fitted the Amal Mk 11 at 30,oookm. It
arrived jetted and tuned for a standard 750 from RGM in UK.ist
problem was spitting back through the carb. Diagnosis lean
mixture when opening throttle. Slide changed with smaller
cutaway(I dont remember the no, its a few years back)problem
cured.Next problem was weak mixture in regular riding, up to
half throttle diagnosed by plug colour.Bike was tested with
warm motor running at continuous speed at 1/3 to 1/2 throlle
and then cutting motor without closing gas.Needle was raised
one notch which cured problem. Similar method used to check
main jet size . The carb works cleanly from idle up to high
revs with no hesitation, easy starter from cold, good idle.
Fuel consumption is a reglar 20km/22 km per liter according to
riding conditions. Remember that I presume your motor is in
good condition. I also ride with tappet clearances 002 larger
than recommended as I live in a very hot climate.I have been
riding British Iron for 50 years, so have some experience. I
love my Commando, its a great bike to ride, sounds and looks
good. I am now building up a 75 model Interstate E/S and hope
iy will be as good as the Fastback
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