Question about 1982 Yamaha XJ 650

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I am selling my 82 xj650, the buyer wanted to hear it run as it has been sitting for two years. I pulled it out, added gas charged the battery and added oil. It started, but now the clutches froze!

See problem.

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  • Expert
  • 157 Answers

Not uncommon for a Yamaha that has sat this long. Condensation in oil has rusted the clutch plates together. You can try riding the bike in 1st gear and with the clutch held pulled in snap the throttle open and closed repeatedly untill it breaks free. This will be a wild jerky ride so be careful and have plenty of room to operate. If it does not break free within a period of time that has brought the engine up to full operating temp. then dissassembly of the clutch will be the only answer.

Posted on Dec 30, 2012

  • Clarke Latten Dec 30, 2012

    Thank you! It was crazy ride lol! (made especially crazy with all the snow!) I was able to brake it loose the third time around the block. Neighborhood thinks I'm crazy, but I got it fixed and sold. Heart breaking to let it go, but thanks for your help!

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

cape cod bob
  • 292 Answers

SOURCE: How to change oil in my 82 yamaha xj650.

the oil filter should be inside the round finned cover at the front of the motor/trans. if you have found the drain plug also at the front but underneath, the filter is above it.... oil capacity should be molded into the crankcase next to the oil filler cap

use stadium yamaha website for exploded views on all parts of your bike

Posted on Mar 22, 2009

joughton
  • 38 Answers

SOURCE: Stuck in first gear

On the XJs, there is a plastic part that eventually breaks up, and pieces of it jam the shifter in first. YOu can fix this with a dnetail mirror, a flashlight and some probes or tweezers. Take off the clutch cover, and then peer and probe through the hole inside. Look for pieces of plastic (they'll be hard to spot), fish them out). Once you've got them all out, the bike should shift again. Experienced owners tll me the bike seems to continue to perform well without replacing the plastic bit.

Posted on Jun 04, 2009

  • 3567 Answers

SOURCE: what type of Oil should I be adding to a 1983

Use 10w40 motor oil in the gear box. Don't use any synthetic oils, oil marked "EC", or oil with "special" additives. Stick with the major brands; Pennzoil, Quaker State, Mobil or Shell.

FYI ---- Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx

A “very helpful” rating for this answer? Thanks! < < And it doesn’t cost anything extra!

Posted on Jun 19, 2009

  • 298 Answers

SOURCE: no clutch

Yes this is evident in replacing engine oil to motorcycle engine.

Engine oil designed for automobiles isnt good for motorbikes as they offer additives for added "slipping". THis will cause your clutch to slip. Automobile Engine's oil system is separate from the clutch while motorcycle's clutch and engine fall under one oil system.

Use engine oil designed for motorcycles.
Solution: Buy and Engine flush, pour it to your crankshaft, run the engine for 5 minutes (idle) then drain. Replace with new motorcycle oil.
-levibit-

Posted on Jun 21, 2009

joecoolvette
  • 5660 Answers

SOURCE: Just bought a 82 xj650. It has some flooding

Yes.

1.Remove the Float Bowl, (Turn gas off first), and clean the crud out of the bowl. (Bottom of the carburetor)
There is a brass nut in the middle of the float bowl, which is on the bottom of the carburetor.
There is a fiber, or brass washer on that bolt. DON'T lose it! (Turn it to the left)
The brass bolt, (Main Jet Plug), goes through the float bowl, and into the Main Jet.

Remove the float, (Carefully! If it's a plastic designed float, Don't nick it with your fingernail/s. Also make sure it isn't soaking up gas. If so, {You'll know!}, replace it)

A.DON'T let the float needle valve fall out, when you remove the float! The Float Needle is attached to the float, with a small 'hair spring' clip.

B.DON'T lose the tiny, 'hair spring' clip, that attaches the float needle to the float.
Observe VERY carefully how this tiny spring clip goes on the float, ->Before you remove the float pin. (The float rotates up, and down, on this long round pin) It has to be put back the same exact way)

Handle the float with extreme care. It is set to a certain height. The measurement goes from the bottom of the carburetor body, (Where the side of the float bowl touches), to the top edge of the float.

The top of the Float Needle has a groove cut around it. That 'Hair Spring' clip I described above, clips in this groove. The other end of this 'Hair Clip', goes around a flat area that extends out of the side of the float.
Once you get the float bowl down a bit, you'll see what I'm referring to above.

C.The Float Needle Valve is made of metal, and has a Neoprene, (Like rubber), tip on the end. The Neoprene tip is cone shaped. A light little ring mark on the Neoprene tip is okay.
If the tip is broken, or mushed out, the Float Needle Valve is no good.

More than likely you just have crud in the float bowl, and it is also down in the Float Needle Valve Seat.
(The Float Needle Seat is a brass cylindrical shaped piece. It has a tapered hole inside, down at the bottom. Fuel, {Gas} comes through this tapered hole, and the Float Needle Valve regulates how much. The float raises, which raises the float needle valve. Fuel comes through the tapered hole. The float drops, which lowers the float needle valve, and stops fuel from coming through the tapered hole, and into the float bowl)

After time, the bottom of your gas tank develops rust, from moisture in the gasoline.
Dirt also finds it's way into a bike's gas tank. Also the additives in gasoline accumulate after a while.

If you do not have an inline fuel filter, I advise you buy, and install one. This way you change the fuel filter element, and do not have to tear the carb/s down again.

Posted on Aug 07, 2009

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