Question about 1981 Yamaha XJ 650

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Need gas cap assembly directions - 1981 Yamaha XJ 650

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Modesto yamaha modesto california there about 65.oo$ if you have lost the key take the tank
to a locksmith it will cost about the same they may have a try key that will work in any case be prepaired to spend some money

Posted on May 10, 2009


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Some guages work some dont

Might be as simple as re-seating the plug to the gauges. I'd certainly try that before tearing anything else apart. Not hard to get to. Remove allen bolts under gas cap cover and 2 on front of chrome tank assembly, plus 3 Philips head around gas cap, and lift assembly. All guage wires are in one plug under front portion of assembly. NOTE: There's a small clip under the rubber boot you need to squeeze to release the plug. Unplug, replug and see what your gauges do (you can test this -before- reassembly) Good Luck!

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1 Answer

Check engine light/evap leak

Getting a smoke test is the right direction to go in.
The computer vents the gas tank to the vapor canister while the engine is running. It also pressure tests the system for leaks. Some where between the gas tank and the vapor canister there may be a leaking hose or valve. Or it could be the gasket on top of the tank where the pump assembly went in.
The gas cap could have been a source for the leak, the other things are not involved.

Apr 24, 2013 | Oldsmobile Cars & Trucks

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Circuit fault 2000 camry P0446

P0446, This is a EVAP code,check the gas cap is the seal torn?Do you tighten the gas cap properly,If there is a circuit problem this will reside in the CCV (canister closed valve),VSV (pressure switching valve),or a disconnected hose at the charcoal canister,if anything just replace the gas cap first,clear the code and go from there

Aug 11, 2012 | Cars & Trucks

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Yamaha XT 225 assemble gas cap

Hi, Toddsteenrdo for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $10 you can download another one.
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Jul 12, 2011 | Yamaha XT 225 Motorcycles

1 Answer


As far as I know, it opens the same way any other gas cap opens. Twist it in the counterclockwise direction. However, the bike may have a custom style gas cap installed on it. Evidently this is a previously owned bike that you have because I'm sure it's need fuel in it since it was first sold.

Aftermarket caps come in all types. One of the most popular are the flush fitting aircraft type caps. These open by pressing them downward and releasing the pressure quickly. The cap will jump up allowing you to take it off.

Good Luck

Nov 06, 2010 | Harley Davidson XL 1200 C Sportster Custom...

1 Answer

Flame not going into heat tubes

Make sure the regulator assembly on the gas valve is for propane. Sounds like the gas pressure is too low and the flames aren't going into the burner tubes. Make sure they didn't install an appliance regulator on the back of the fryer. This is not needed as the fryer has a regulator on the gas valve. You can unscrew the cap on the regulator assembly and turn the plastic screw inside all the way in. DO not turn with alot of force. Easy does it.

Jul 23, 2010 | Imperial IFS40 Deep Fryer

3 Answers

The check engine light keeps coming on -we were told it was because gas cap was loose-but she filled up & tightened the cap-but still on

First, you need to go to a local parts store and find out what the code means. If it shows a small leak, the gas cap probably needs replaced. Gas caps need replaced more often now that computers register fuel emissions.

Jul 01, 2009 | 2006 Suzuki Grand Vitara

2 Answers

2003 yamaha v-star 1100 gas cap assembly instructions. The screws fell out of my gas cap and the gas cap fell apart. I need to be sure that I have all the parts out of my gas tank. I need a gas cap...

You are probably not going to find assembly instructions. If you can't find all the parts or screws then get another cap. Google " motorcycle salvage yamaha " and you can probably find one at a much lower cost than the dealer would give. By the way, forget any loose screws in the gas tank. The stuff can not get past the fuel valve and filter and are not going to hurt anything.

Please rate this answer. Thanks!

May 01, 2009 | 2003 Yamaha V Star 1100 Classic

1 Answer

Used gas cap for my R65LS 1983

try bob's bmw on the internet for new and used parts. donnyb60

Feb 17, 2009 | 1983 BMW R 65 LS

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