Question about 2003 Honda VT 750 CD Shadow A.C.E. Deluxe
Just took my Spirit VT750 into shop for backfire issues. It seemed better for the first few blocks, but was idling at 1200 rpm. Turned the idle screw down a little and its still backfiring when letting off or down shifting. Did i screw it up or did my mechanic rip me off?
Just go back to the mechanic,you need to be sure he cleaned the tank, fuel lines and filter. the backfiring is probably the result or trash making its way to the carburetor. They should be cleaned again,to be sure,if more trash keeps showing up you need to seal or replace the source of fouling.(otherwise you will not ride) Once the cleaning is done the condition of the parts involved should be concidered. Look for damaged seals,loose nuts or bolts on intake, check the carburetor mounts closely for fit and sealed,(any air not controled is a problem.) Sometimes backfire is the result of cool air entering into the hot gassified exhaust,where it promptly explodes! Stoping this air could also eliminate backfiring.(Check for hot air getting out of the exhaust system)from header flange to the weep holes,replace any damaged parts tighten up any others.Please let us know how you do.
Posted on May 02, 2010
I would probably take it back to the mechanic and ask, the high reving could be loose or cracked inlet manifolds or a clamp left loose, this can cause backfire as well as that cylnder runs lean, other causes of back fire are, lean fuel issues, low ignition voltage, leaks in exhaust gasket or exhaust, incorrect valve clearance, just on downshift try manifolds and exhaust first
Posted on Apr 23, 2010
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Posted on Jan 02, 2017
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