I have 2013 Suzuki boulevard c90t...Bike runs good in initial but as it warms up or after riding it few miles, it dies and backfires as I try to open throttle.Cant open throttle so I run it on low rpm ..Please advise what to do.
Check for problem coil/s and ignition control module
the indications that an electronic component is failing when it gets hot and causing intermittent spark
Testimonial: "Hi, Checked every thing..but problem is still there...coils checked..My mechanic is saying to change the ecu... Thanks"
SOURCE: GSX750FX running problem
needs the carbs cleaned out, and possibly some new spark plugs. If it has been over 4K since the plugs were changed, they need replacing also.
SOURCE: 2005 C-50 Suzuki Boulevard - A back fire occurs
For pollution control, the bike is equipped with a pair valve. It injects air into the exhaust to burn wasted fuel. Many companies sell block off plates to remove the pair valves since they are so annoying.
SOURCE: I bought my first bike used & it rode fine! Its dying
Possibly if too full oil is getting to combustion chamber? Have you pulled a spark plug to see what they look like? You should check owners manual for correct procedure on addin/changing oil. I always recommend the shop manual for usually under $15 at auto/cycle parts stores.
SOURCE: rough start, won't stay running. Got bad gas at
Drain the tank of the old fuel completely, try to drain the fuel lines as best you can. Whilst the tank is empty, if you can remove the fuel pump and clean out the filter for debris or gunk. Pull out the spark plugs and see if they have fouled, don't try cleaning them just replace. I have found once a plug is fouled, it is best to just bite the bullit and buy new ones as issues can happen again.
SOURCE: 2006 Suzuki Boulevard C50 engine dies
Even though you probably don't have that many miles on the bike, or if you do have a lot riding time on it, it sounds to me like you need a valve adjustment. That's a high reving bike for that engine that works pretty hard so you might have 1 - 3 loose valves.
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