Question about Hyosung Motorcycles

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Bike turns on fine runs well but does not have power, deos not have the speed its had a few days ago. barley goes passed 40mph unless down hill. hyosung 650 07

Has no speed barely pushes passed 40-50 mph

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  • Michael M
    Michael M Dec 04, 2013

    replace air filter, spark plug and fuel filter. engine dose not rev high unless i try to push for more speed and contuines at same rate of speed, i only put suprem gass in it. i assume now i should check for plugged exhast, valve adjustment, and timing as you stated.

  • Behind_Blue_Eyes
    Behind_Blue_Eyes Dec 04, 2013

    I would look at 2 things specifically... The carburetor and the timing chain. The timing chain has an automatic adjuster and the chains stretch and the tensioner has no more travel for adjustment. but these motorcycles barely went 60-62 mph...

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  • Master
  • 1,727 Answers

Check air filter, spark plug and fuel delivery in that order. then check for plugged exhaust, valve adjustments and then timing. in the mean time answer these questions. is the gas fresh and from a known good source ??? did you do anything to it recently ??? is the engine revving high while you are moving ???

Posted on Nov 27, 2013

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SOURCE: 2005 CRF450R Hard to start and wont idle

Hi
I would suggest that you have the valve clearances checked.

Also, check that the carb is clean. Pay particular attention to the PILOT JET as this opperates the idle circuit.

Jon

Posted on Mar 05, 2009

  • 440 Answers

SOURCE: My 2008 gsxr 600 that i bought 2 days ago is

Its nothing to do with the damper
The battery may not be accepting charge due to its age or condition (although as u can bump it soon after it sounds ok). Check this out with a charger & meter
There may be a bad or dirty connection somewhere between the alternator & regulator/rectifier or from there to the battery
It could also be a defective alternator winding or regulator/rectifier unit
Ride Safe
Bike-doc

Please mark this as useful (if it has been!!)

Posted on Aug 03, 2009

  • 1 Answer

SOURCE: hi i have a hyosung gt650r only push starts.....

my gt250r wouldnt start all light turn on

Posted on Sep 11, 2009

SOURCE: 2002 Hyosung GV250 running problems

Time for carb cleaning , blow the jets with compressed air,check the float level.
Check the spark plug and replace if neccessary.
Check the air filter too, and if you don't have an 'inline' filter for your fuel line,install one.
Basically yr bike's engine needs a tune up...check the valve clearance too!
Hope this helps!

Posted on Oct 30, 2009

  • 3567 Answers

SOURCE: wont idle unless i havethe throttle barley turned

The idle circuit is still plugged up or it would not be giving you this problem. Remove the carb and dis-assemble it then soak the parts in denatured alcohol for 30 minutes. Then use a spray carb cleaner to finish the job. Spray into all the little holes in the carb body. Especially spray into the air screw and throttle screw holes. Reassemble the carb and LIGHTLY seat the air and throttle screws then turn each of them one and one half turns outward. This is the factory setting. Before putting the slide back into the top of the carb, move the clip on the jet needle one notch lower on the needle. This will richen the low end fuel mix. Install a new spark plug and clean the air filter. Please rate my answer. Thanks.

Posted on Feb 09, 2010

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