Question about 2013 Suzuki Boulevard C90T B.O.S.S

1 Answer

Boulevard backfires and dies.

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.

Posted by Anonymous on


1 Answer

Bill Boyd

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  • Suzuki Master
  • 53,816 Answers

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

Posted on Aug 23, 2016

Testimonial: "Hi, Checked every thing..but problem is still there...coils checked..My mechanic is saying to change the ecu... Thanks"

  • Anonymous Aug 24, 2016

    "Hi, Checked every thing..but problem is still there...changed the coils,checked the plugs but the problem is still there..My mechanic is saying to change the ecu... Please suggest.

  • Bill Boyd Aug 26, 2016

    change the ecu



5 Related Answers


  • 1392 Answers

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.

Posted on May 29, 2009


Mike Phillippi

  • 434 Answers

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.

Posted on Jun 25, 2009

Paul Blessing

  • 188 Answers

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.

Posted on Jul 26, 2009

Noel O'Kell

  • 185 Answers

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.

Posted on Nov 24, 2009


Angelo Stewart

  • 224 Answers

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.

Posted on Dec 10, 2009

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Related Questions:

1 Answer

How do I change spark plugs on 2013 Suzuki C90T?

lift tank to gain access.. join someone there will help and theres a pile of files for you in the files section

Aug 09, 2014 | 2013 Suzuki Boulevard C90T

1 Answer

Engine cuts out

Try this. When you get to work leave the bike running and turn the fuel selector knob to off and let it run til it cuts off. It will drain the fuel from the carbs and trap the rest in the tank. It removes the air bubble in the lines problem so when you get ready to leave, switch the fuel on and wait a few minutes then crank her up and ride.

If you need further help, reach me via phone at

Jul 03, 2014 | 2013 Suzuki Boulevard C90T

1 Answer

Backfiring on decel

If this is a new condition and you've not worked on the bike recently, I'd try a dose of StarTron in the gas tank. It will eat the sludge that grows in fuel systems exposed to gasohol. Put it in the tank, ride a few miles to get it into the carbs, and then let it sit overnight. It has special enzymes in it that do the job. Seafoam is a good product but is not designed to clear bacterial sludge.

Apr 10, 2014 | 2005 Suzuki Boulevard C90T

1 Answer

2007 suzuki boulevard c90t. Starts right up no problem, but only runs for about 5 second then dies. Will start right back up, then shut off again.. So on and so on


It sounds like your bike is starving for fuel. Check your fuel pump (pull the outlet hose off and try starting it) and your fuel filter. Also check your carb lines to see if fuel is constant at the carbs.

Try these things and if none of the above works, reply to this post and let me know what you discovered so that I can determine the next steps you need to take.

Hope this helps. If you find this information useful, please vote on this post. Thank you.



Jan 17, 2011 | 2005 Suzuki Boulevard C90T

1 Answer

I have a suzuki motorcycle c90t 2008. no manual and i dont know what weight oil to use.

it is recommended to use Suzuki 10w40 in that bike dont use synthic until after 20000 miles as the clutch will slip and in my opion I wouldnt use syn at all in that bike.

Oct 31, 2010 | 2005 Suzuki Boulevard C90T

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