Question about Fiat 124

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Backfires out the carb

I have a 1967 lambretta. it is a 2 stroke 150 cc engine with a kick start. when i kickstart it, it backfires out the carb, i do not have the air hose attached at the moment. it also smokes slightly from the cylinder area. i haven't gotten it started, but right now im concerned with the backfiring

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Clean spark plug an gap it to .025inch

if still backfiring reset timing / points

Posted on May 11, 2009

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If you see smoke from the cylinder area then something is loose or a gasket has blown. This could be a) the plug b) the exhaust manifold and/or gasket c) the cylinder head and/or gasket.
You will need to remove the head cowling to see properly. This is simple but you MUST first remove the read shock absorber and the rubber engine 'bump stop' to allow the head and cylinder to swing down clear of the frame. look at http://www.scooterhelp.com/tips/engine/lam.engine.main.html

Posted on Oct 05, 2009

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I have a 1100 Honda Shadow ACE and it is back firing when I turn down the throttle especially down hill.What is the solution. They are stock pipes.

Posted on Aug 07, 2009

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