Question about 1982 Yamaha XJ 650

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Bench cleaned carbs, new battery, turns over, does not start

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  • Yamaha Master
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Have you checked if there are sparks at the spark plugs once you crank start the engine?
Does the gas reaches the cylinders, are the float level in the carburators within specs?
Please go this website and there is a lot of info with regards to our type of bikes www.xjbikes.com

Posted on May 04, 2013

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Posted on Jan 02, 2017

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Scooter wont start


Sounds dlumb, but first check and see that the fuel is flowing into the carb. You should make sure the ignition is working properly and firing, do this by pulling the plug wire from spark plug and hold it about a quarter inch from metal while turning the engine as if starting. A strong spark should jump the gap without a problem. If the spark is nice and blue, pull the spark plug and check to see if it got flooded out and is wet. If so, dry it out, clean it, regap it it, or install a new one. Then try starting it again after adjusting the new carb by turning the idle screw all the way in, then back it out one and a half turns for initial setting. If it still has problems spray starting fluid into the carb while turning it over. You should also check the new carb float level since not all new things work as they should.

May 25, 2014 | Health & Beauty

1 Answer

2004 ptcruiser car will not turn over have new battery in it


Does it turn over? If not check the starter connections... if good try banging the starter while trying to start the car, if that does work you need a new starter... If not check power to starter, and clean up grounds. If voltage & grounds are good and still doesnt start remove starter and bench test it.
If it does turn over... Check ignition system and fuel system for possible faults

Jul 23, 2013 | 2004 Chrysler PT Cruiser

1 Answer

Klx250 wont run it has spark new battery and cleaned carby but wont fire up will occasionaly start and run fine


Remove the filter or filter connection to the back side of the carb and spray it with starter fluid. If it starts when you do that each time, the carbs still have a problem and need to be cleaned out again or adjusted correctly.

Jan 17, 2013 | 2005 kawasaki KLX 250

1 Answer

1999 Yamaha 1200GP Wave Runner wont' start. It has sat for about 2 years. I have new battery, new plugs and new gas, it turns over but won't start, any suggestions?


Sounds like the carbs are gummed up from the old gas sitting in them. Remove the carbs, disassemble, clean with a carb cleaner, and reassemble.

May 14, 2012 | Motorcycles

1 Answer

1982 Yamaha Seca Turbo (XJ650LJ) Had the carbs


Mine was stored for 20 years, I ended up replacing the seat and needles, cleaning them thoroughly and when I tried starting it, nothing!! No gas was going to the carbs, it turned out to be my gas pump, it was seized by the old gas remains 'varnish' so I had to clean it numerous times, soaked it in gas cleaner (short period at a time 15 minutes or so, being a very powerful cleaner, you cannot leave it for long without causing greater problems, thus I was able to get the pump going by boosting it with my car batterie, having more cranking amps directly to the pump, the pump was able to release itself from the old crusty varnish.

Aug 29, 2011 | 1982 Yamaha XJ 650

1 Answer

'96 fzr 600. Bile has not been started in two years. I have removed the carbs but before i clean them, any advice? I've removed the tank, and cleaned it already, now the carbs. I've been maintaining...


do one at a time use proper carb cleaner, lay the bits out carefull on a clean bench or table then you can rebuild it from the ones you have left together.

Mar 21, 2011 | 1995 Yamaha FZR 600

1 Answer

I bought a 1985 GS 550 LF. It had been sitting for a year, so battery was dead tank & carbs were dirty, clutch cable was broke. I fixed the clutch cable, cleaned the gas tank, bought a new battery and...


Gas pouring out of the carbs means the float pin are not sealing in thus the over flow.
Go a little down thn .77in , best would be to bench set them.
Take a pipe say from the tank to the feed pipe of the carbs (best would be to remove the tank and place it higher on your work bench to get the gravity flow to the feed pipe of the carbs)
Allow the flow to the carbs and monitor the over flow, see which carbs over flow, remove the float bowl and reset the float and let it go a little less thn .77in, refit the bowl and retry the feed in and recheck..you will come to a point where gas wont over flow, open the bowl and see the level of the gas , it should be covering the jets, but remember that since you will have the float bowl out the gas will show low as when its submersed, the jet stem in the float bowl pushes the gas level up so dont get mixed up when you see the level low , i am sure you will be able to judge it for yourself.
I had the same problem in myYamaha(seca) XJ750R !981and finally managed to win over the problem going over it the way I explained.
Hope this helps! Good luck.

Jul 14, 2009 | 1984 Suzuki Gs 550 L

2 Answers

Starting problems


Did you bench test the old starter? Did you bench test the new starter?
the battery may appear to be good, but try jumping it with another battery.
check the cables.
use a set of jumper cables to bypass the battery cables, this is a quick way to trouble shoot the cables.
hook red to the start solenoid an black to the engine block.

Try these and let us know how you make out
hope this is of some help.
Ed

Apr 18, 2009 | 2005 Subaru Legacy

1 Answer

Bike wont start


First thing > install a new set of the stock NGK spark plugs for your bike. Check for spark before installing. If no spark, then check to be sure the battery wires are clean and tight. Is the kill switch on? Is the side stand up? It should be up when starting. Is the bike in neutral? Check the fuses. Check the wiring connections, are they tight?

If spark is present, is the gas turned on? Clean or replace the air filter. If the bike still will not start go ahead and drain the
carbs. There should be a screw on the lower side of each carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carbs to fill with gas. If the bike doesn't start properly then shut off the gas and remove the carburetors from the engine.

For both
carbs > remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.

Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together. Remount the carbs.

Next, remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Turn the gas back on to let the float bowls fill then start the engine. Be sure to balance and sync the carbs when finished. If you don't know how to balance and sync the carbs, get back to me after you do the stuff mentioned above. This process should get you back on the road.

Please rate this solution as " FixYa " if all goes well. Thanks!

Mar 28, 2009 | 2008 Harley Davidson VRSCAW V-Rod

1 Answer

Cleaning the carbs


1st-take off fairings & tank,seat, take carbs off. drain fuel, & turn over on bench. take bowls off.disassemble jets & floats in each carb, do not mix components from each carb.soak in carb cleaner until clean, & no obstructions in jets. soak bowls also.squirt through carb. air & fuel circuits w/ spray carb. cleaner.when everything is cleaned, reassemble carbs. check carb. float needles for leaks. if all ok ,install carbs on bike.now using remote fuel supply bottle, hook up to carb set.start bike & warm it up,now synchronize carb. set w/ vacuum guage set.reassemble tank,seat, and fairings. note:this really is not a job for the novice w/o competent supervision, a service manual is recommended before beginning.

Feb 20, 2009 | 1986 Suzuki GSX-R 750 G

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