Suzuki fa50 low top speed need help, tried everything.

justin fox /
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Hi guys, I have a problem. I have a 1981 suzuki fa50, it starts on the first kick every time runs flawless. But it only goes 17 or 18 mph when it hits that speed it changes the sound it makes from a smooth running engine to somewhat of a farting sound. It acts like it's not running as good as it should be and occasionally it will surge for a second or two. So things that I have done to it. Everything. I've done literally everything. Changed every parts and no new part makes a difference in the way it runs. At this point I am questioning if the motor is bad except that it runs and starts so good. I bought a parts fa50 and just started changing parts. Things I've changed so far. Muffler, airbox, both changed and also ran without them on the fa50 no difference. New carburetor, (chinese I assume), changed the 2 jet screws on the side as well from new to old, no change in it running. I've changed the coil, checked the magneto, changed the regulator, the petcock, I've mixed the gas with oil and drained the oil pump to see if it was putting in too much oil, still no change in it running. It also puts oil out the tail pipe not a ton but definitely noticable. Only things I haven't done is change the chain oil and replace the bad battery. It also has a light electrical issue, I think the battery is bad and a couple bulbs are blown. Anyway that's it. Any ideas as to what is wrong? I really like the fa50 but its driving me crazy. (edited)

20191025_173507.jpg
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Subject Written By Posted
  Suzuki fa50 low top speed need help, tried everything.Topic by: justin fox justin fox 05/03/20 04:05AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/03/20 09:24AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 11:04AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Michael Smith Michael Smith 05/03/20 10:22AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/03/20 10:44AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 11:10AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 11:07AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Michael Smith Michael Smith 05/03/20 11:28AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 11:36AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 11:30AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Michael Smith Michael Smith 05/03/20 11:39AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/03/20 12:01PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 12:25PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/03/20 12:59PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 03:07PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/03/20 03:40PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/03/20 09:40PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Jack Rutherford Jack Rutherford 05/03/20 10:39PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/04/20 08:36AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/06/20 01:02AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Dr. Mantis Toboggan M.D. Dr. Mantis Toboggan M.D. 05/04/20 01:37PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/06/20 05:45PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: live ɘvil live ɘvil 05/04/20 05:31PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/06/20 01:03AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Stephen Keller Stephen Keller 05/06/20 10:24PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Cameron Cate Cameron Cate 05/06/20 06:53PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: live ɘvil live ɘvil 05/08/20 05:40PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/08/20 05:16PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/13/20 03:54PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/13/20 03:55PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Stephen Keller Stephen Keller 05/14/20 01:17AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/14/20 08:37AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Stephen Keller Stephen Keller 05/14/20 12:04PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/14/20 09:46PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/14/20 09:43PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/11/20 12:47PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Pushrod Fifty Pushrod Fifty 05/11/20 04:17PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: live ɘvil live ɘvil 05/11/20 08:01PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/13/20 03:58PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/13/20 04:00PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Michael Smith Michael Smith 05/13/20 09:10PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/13/20 09:57PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Dr. Mantis Toboggan M.D. Dr. Mantis Toboggan M.D. 05/14/20 02:01PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/14/20 09:49PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/15/20 02:39AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Stephen Keller Stephen Keller 05/15/20 03:51AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/15/20 01:11PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/16/20 04:59AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Wet Truck Daddy Wet Truck Daddy 05/15/20 03:11AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/15/20 03:25AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/15/20 03:37AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/15/20 03:42AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Aaron Blair Aaron Blair 05/16/20 06:29AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: P D P D 05/16/20 08:31AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/16/20 05:16PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 05/16/20 05:17PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 05/18/20 12:54AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: punkrock randy punkrock randy 05/22/20 10:08AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 06/10/20 07:04PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 06/10/20 07:14PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Dr. Mantis Toboggan M.D. Dr. Mantis Toboggan M.D. 06/11/20 11:44AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 06/12/20 03:58PM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: justin fox justin fox 06/13/20 10:39AM
  Re: Suzuki fa50 low top speed need help, tried everything.Re: Rob P Rob P 06/10/20 07:19PM

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