Question about 1985 Yamaha XJ 700 X Maxim

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My maxim x water cooled 1985 700 c.c. how do i adjust the idle

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If you look under the carburetor rack you will see an oversize screw hanging down. When you turn that screw it will raise or lower your idle by adjusting all the carburetors at the same time. It is part number 34 on the microfiche carburetor page. You can view the diagram at bikebandit.com.

Posted on Oct 02, 2010

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1 Answer

My 1981 maxim 650 idles high. what is the correct idle setting and how do i adjust


Hi, Robertshenk and the usual suspects are:
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2. Idle adjusting screw needs to be backed off.
3. Intake system air leak.
4. Fast idle choke ramp is not releasing.
5. Broken throttle return spring.
6. Damaged diaphragm or slide.
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I have a 1984 Maxim XS 400 L that won't stay running unless choke is on


Hi, Dmg24jeff and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
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4. Float needle and seat sticking.
5. Float level too low.
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I have a 1990 jeep wrangler yj . 4.2 with a used weber carb 36/32 . it stalls at a stop sign . the vacume lines seam to be hooked up ok the back port above the throttle is caped off the idle mixture s


The idle mixture screws do not control the idle. Is there no idle screw? If you have an anti-dieseling solenoid on the idle screw, make sure it is coming on with the ignition switch and use it to adjust the idle. Set the idle and then adjust the misture screws to maximize intake vacuum at idle. Readjust the idle after adjusting the idle mixture. The port at the back of the carb is not used in all systems. If you have a distributor with vacuum advance, make sure the correct carb post is connected to the distribtor. Adjust the choke and fast idle to engage when the engine is cold.

Jul 15, 2017 | Cars & Trucks

1 Answer

1985 maxim x 700 has trouble starting sometimes and wants to idle at 4000 rpm or stalls when adjusted, just rebuilt the carburetor still won't idle correctly


Hi, Dlmninja 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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Jul 21, 2011 | 1985 Yamaha XJ 700 X Maxim

1 Answer

Hi, my yamaha maxim 650 will start but will not idle off choke or stay running off it or when i give it alot of gas. could it be the petcock? or the throttle adjustment screw?


Hi, Alexmacy and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
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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May 16, 2011 | 1981 Yamaha XJ 650

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

1 Answer

Why does my 1985 Yamaha Maxim XJ 700 stall / die in the rain. I can be riding along at 50mph in the wet rain / drizzel then it just dies


Hi, Achlubna and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. The gas cap is not venting properly or fuel tank venting system blocked.
15. A failed fuel pump, pressure regulator and or fuel injectors.
16. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
17. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
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3 Answers

1984 yz 125 power valve how do i set it


You don't have to do anything It does it on its own as long as the pieces are all there. The power valve is the thing that opens up a larger exhaust hole for the two stroke engine. It is shaped like a spool and it twists as pressure builds due to high rpm. On the 1984 it is on the left side of the bike right up front behind the clutch cover.

Aug 04, 2009 | 2003 Yamaha YZ 125

2 Answers

Engine cuts out with clutch engaged.


idle adjust?
there SHOULD be an adjuster under the seat or gastank within easy reach. Clockwise to increase rpm, ccl to decrease rpm. idle around 1400rpm when engine is at normal operating temp. Good luck!

Aug 04, 2009 | 2002 Yamaha YZF-R1

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