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Late Atlas came with 30 mm carbs as standard.The Commando with 9:1 pistons was eventually fitted with 32 mm carbs with a curved manifold that was 32 mm at the carb end tapering down internally to 29-30mm at the port endAn ideal situation if you are insistent on using 32 mms is to taper turn your existing straight manifold from 32 to 29-30mm to accommodate the bigger carbs-whatever you do, DO NOT open the inlet ports in the inlet side of the cylinder head to 32mm, you WILL slow the gas speed right down-don’t ask me how I know.
Late Atlas came with 30 mm carbs as standard.
The Commando with 9:1 pistons was eventually fitted with 32 mm carbs with a curved manifold that was 32 mm at the carb end tapering down internally to 29-30mm at the port end
An ideal situation if you are insistent on using 32 mms is to taper turn your existing straight manifold from 32 to 29-30mm to accommodate the bigger carbs-whatever you do, DO NOT open the inlet ports in the inlet side of the cylinder head to 32mm, you WILL slow the gas speed right down-don’t ask me how I know.
