350x jetting question

[TatTooL23]

my '86 350x backfires constantly. anytime u let off the throttle instantly it backfires. the bike has a DG head pipe and muffler so i am thinking it is maybe not jetted correctly. does anyone know approximately what the jet size would be for a stock motor and then a DG pipe and muffler?? thanks.

[haggard 2hundie]

i had a small crack on my intake tube causing my 200x to backfire ?

[mike1979]

Loose headpipe? Could the exhaust be sucking air from somewhere?

[twitch101]

check your exhaust gaskets. any small gap will cause a backfire.