Question about 1981 Suzuki GS 650 GT

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New to me bike 1981 Suzuki 650 gs need general overall maintence

I have read these are hard to start when cold....well she is - 30 here haaaaaaaaaa (wont try till warmer)
any way the tank had been drained and no fuel....should i add some fuel stabelizer to the fuel?
and should i add carb out she has been sitting for about a year

and anything else i should do before the first try at starting her?

newbie gal with a bike!

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  • Anonymous Mar 14, 2014

    my 1981 suzuki gs 550l. Twice now i have had my gas go into my oil had to change the stator twice now.This season started it up and again didnt run right and checked and fuel fill the crankcase for the third time.People are telling me its the pecock vavle on tank.They say it is a vacume system and it needs to be replaced is this so.I have the bike particialy apart want to know if i should order a new pecock valve,and of course another stator



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Hi and welcome to FixYa,

A couple of ideas you may want to consider when starting a bike that has not run for some time:

  • drain the carbs - there are drain screws at the very bottom of each carb for this purpose. Of course best would be to rebuilt the carbs or at least, disassemble and clean;
  • of course change to a fully charge battery;
  • remove the sparkplugs, get a clean dry sprayer similar to those used with plants;
  • fill the sprayer with some 2T oil, used for 2 stroke engines;
  • spray the inside of each cylinder through the empty sparkplug hole at least one spray. if the sparkplug holes are rather deep, you can use a short length of a hose;
  • test crank the engine with no plugs. this is to exercise the parts inside and evenly spread the sprayed 2T oil around the piston and rings;
  • ensure drain screws are closed, fill your tank open fuel valve. On most Suzuki, there are 3 positions, ON, RES and PRI. On the initial start pls use the PRI. The fuel will flow. The other two would require vacuum to open the valve.
  • confirm that fuel has entered the bowls of the carbs by opening the drain screw just to check;
  • in some instances, there would be an overflow on the very first filling of the carbs.
Other than the above a few more but these would initially be of help for the moment.

Would appreciate an update, curious myself.

Good luck and Thank you for using FixYa. Happy New Year.

Posted on Jan 02, 2009

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Yes add fuel stabelizer to the fuel the big problem is that laquer builds up in the carb float bowl

not sure about carb this point

what i do is this when you go to start the bike

remove air cleaner so you have access to carbs use engine start spray once bike starts and revs up good you can use a carb cleaner

good luck and go to your local motorcycle shop and introduce yourself to the people there most motorcycle enthusiasts ar more than happy to give advice and lend some help

Posted on Jan 02, 2009


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