Question about 1982 Yamaha XJ 650

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1982 XJ 650 maxim cylinder 2 & 4 won't run

1982 yamaha 650 maxim cylinder 2 & 4 won't run, spark good, carbs completely cleaned, ran with external fuel tank, put bike tank on no fuel to cylinder 2 & 4

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  • Anonymous Mar 18, 2014

    need to know where the starter clutch is located



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Are you saying that 2 & 4 got gas with external tank but not with gas tank? If so something else has happened ,if gas is getting to the carb it cannot by-pass 2 to get to 1. Take the tank back off ,connect to external, again. See what happens.

Posted on Sep 11, 2009


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I need a diagram of the vacuum lines on a 1983 yamaha maxim 650

The only vacumn lines on a Maxim 650 is the small line from the fuel petcock that turns it on when there is intake suction. It can be connected to any intake manifold But is usually connected to cyl. # 2 left to right. The 4 vent hoses to the carb tops just hang down the back of the motor.

Aug 04, 2013 | 1982 Yamaha XJ 650

1 Answer

My 82 yamaha xj 650 maxim turns over but wont start. it sounds like there is no gas getting to the engine . I put premium gas in . looks like the fuel filter hose is not clamped. and there is a slight

Hi, Shawn and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
11. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2, TPS, ETP, IAC,or BAS).
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box if applicable.
17. Tilt sensor needs a reset.
18. Security system not disarming alarm needs a reset.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Sep 15, 2012 | 1982 Yamaha XJ 650

1 Answer

1982 maxim 650 idles rough

Hi, Anonymous and the usual suspects are:
1. Idle speed improperly adjusted.
2. Air fuel mixture screws not properly adjusted.
3. Inlet system air leak.
4. Leaking accelerator pump.
5. Loose low-speed jet.
6. Plugged low-speed jet.
7. Contaminated or plugged low-speed circuit.
8. Enrichner valve/choke not seated or leaking.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Aug 27, 2012 | 1982 Yamaha XJ 650

1 Answer

85 yamaha maxim xj700 carbon fouls pluges 1and 4 in 10 min.

if there oil fouled then rings or valve guides are bad from age--if gas fouled then the carbs need ajust or spark is bad--getta clymer manual

Dec 13, 2011 | 1982 Yamaha XJ 650

1 Answer

I have a 1985 Yamaha maxim that hasn't been ran

Spray starter into the carb intake with no choke, if she runs for a few seconds then you know its fuel starvation
clean jets & airways & blow through with compressed air

Nov 20, 2011 | 1985 Yamaha XJ 700 S Maxim

1 Answer

I have a yamaha xj650 maxim which was a project of mine and it will not idle below 2500 rpms. There have been many add ons though 4 to 1 exhaust free flow air filters clean carbs added stage 3 dyno jet kit...

I would recommend adjusting the idle screw on the carb. If it is not the idle adjustment, then check the choke as it may be sticking and that will cause the engine to idle at that rate.

Feb 28, 2011 | 1982 Yamaha XJ 650

2 Answers

1982 yamha maxim 650 turns over but wont start battery is charged, turns over fine just wont fire up

you need to do basic diagnoses - 1 compression test,should be better than 130 lb and if in good order around 170 and all cyclinders within 14lb. 2 - check and make sure you have spark at all 4 spark plugs. 3- check and make sure you have fuel in carbies by undoing drain screw in each bowl, if above 3 all ok you probably have stale fuel and will need to remove carbs and clean out jets. this model also suffers from worn butterfly shaft through carbs which creates air leak and the manifolds to the head also leak and **** air.

Jul 20, 2010 | 1981 Yamaha XJ 650

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