Carburettor jet M4 1,40

Carburettor jet M4, hole 1.40 mm: the jet meters the petrol going into the air stream. The bigger the hole, the richer the mixture; the smaller, the leaner.

• Thread M4 and hole 1.40 mm — both have to match what you unscrew from your own carburettor
• Supplier code AT DS4140 — quote it when you reorder
• You will change it in a few minutes: undo the bottom of the carburettor, unscrew the old one, screw in the new one
• Change the exhaust, the air filter or the cylinder and the mixture usually goes lean, and the main jet has to be taken a size up — the size is found by trying, not by counting
• Look for other M4 thread sizes and jet sets in the "Carburettors and their parts" category

We write only what we know. The maker gives only the thread and the hole — he does not say which carburettor the jet is meant for, nor whether it will stand in yours as the main jet or as the idle jet. Jets of the same thread differ from carburettor to carburettor in length and in head, so compare it with your old one or send us a photo of it — we will tell you whether they match.

24-month warranty · tel. +370 685 777 56