Question about 2000 Yamaha V-Max

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Yamaha vmax 2000 model, full power, runs fine but will not accelerate past 95mph even when on vboost. It is not restricted

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Air or fuel. Your not getting enough of one or the other. Start with air by removing your air filter (temporarly) and see if that will tell you anything.

Posted on Oct 02, 2009

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Posted on Jan 02, 2017

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Its a 1997 Vmax and just before the V boost starts or call it the pre boost the bike sputters or almost like a bad cylinder.But everything as far as most normal checks things seem fine. Compression on all...


Hi, Stevecruzin personally I believe you have an issue with the V-Boost black box or the servo motor otherwise 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. 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.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor damaged, contaminated, sticky float, plugged jets.
13. Multiple carburetors out of sync.
14. Fuel filter clogged.
15. Old or contaminated fuel.
16. Fuel tank vent system plugged or carb vent line closed off.
17. Gas cap diaphragm valve faulty.
18. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
19. Carburetor controls misadjusted.
20. Incorrect valve timing.
21. Valve springs floating, weak, or broken.
22. Damaged intake or exhaust valve.
23. Incompatible performance parts.
24. Control module may be in "LIMP" mode
25. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
New VMAX owner possible carb or maybe VBOOST problem
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Yamaha VMX12H Supplementary Service Manual
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Apr 17, 2017 | 2000 Yamaha V-Max

2 Answers

2000 Yamaha V-Max Idles low then takes revs


Hi, Shaneharris5 you need to make sure you have no intake leaks by spraying some Brake Kleen, Contact Cleaner, Starting Fluid etc. around the intake manifold and seals, if the RPM's go up or down significantly then you have a leak that needs to be fixed before you can continue with the carburetor adjustment.
The engine should be at operating temperature with the enrichener off to set the idle between 950-1050 rpm. Turn the idle skrew clockwise to increase the idle speed and counterclockwise to decrease the idle speed. If you have access to your air fuel mixture skrew you may turn it as well, if not there is a video below on how to gain access, make sure you start with clean or new spark plugs. Gently turn the air fuel mixture skrew clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the end, now back the skrew out 1-1/2 full turns to establish a starting point start the engine and check the idle rpm's and turn the idle skrew accordingly for 950-1050 rpm if necessary, turn the air fuel mixture skrew 1/4 turn at a time and let the engine settle for about 10 seconds, turn the skrew clockwise for a leaner mixture and counterclockwise for a richer mixture, you are seeking the highest rpm your air fuel mixture skrew can acquire without going past 3 full turns from bottom then resetting the idle skrew back down to 950-1050 rpm If you can not detect any rpm change and can not stall the engine by turning the air-fuel mixture skrew all the way in then your pilot/low-speed jet is too big and needs to be replaced with the next size smaller. Final adjustment should be made with a clean air filter mounted to the carburetor.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
New VMAX owner possible carb or maybe VBOOST problem
stalling max VMaxForum net
Yamaha Vmax VMX17C 2009 Service Manual
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Aug 01, 2011 | 2000 Yamaha V-Max

1 Answer

VBOOST NOT WORKING


Hi, Vmax1260 for this scenario you will need your service/owners manual if you can't find the best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
VBoost problems VMaxForum net
boost not working
Yamaha VMX12H Supplementary Service Manual
OEM parts for Yamaha
Yamaha VMAX VMX12W1 Owner Manual

May 24, 2010 | 2000 Yamaha V-Max

1 Answer

Hey, I've got a Max with 5000 kilometers on it. For past 2 years it has been running very rich in fuel.Had it in shop last year to have the carbs looked at and was told they were fine.I am the second owner...


Sounds more like the previous owner did some modifications to the bike such as a jet kit. The jet size was probably increased in the carbs with no other modifcations. This will cause the bike to run rich. If you do not have an aftermarket exhuust and a k&n air filter already then this may be you problem.

Apr 10, 2010 | 2000 Yamaha V-Max

1 Answer

YAMAHA WAVERUNNER 2000 XL 800, WILL NOT RUN PAST 12 MPH


Have you done a compression test on all cylinders? My guess is you have a dead cylinder (no oil to one or more cylinders causing loss of power). If the compression test passes (all cylinders equal and higher than 100-110 psi) you have a restricted exhaust from a failed catalytic converter that has broken apart.

Apr 05, 2010 | 2003 Yamaha YZ 250

1 Answer

Vmax vboost won't cycle when the key is turned on (it tries to)


I had a similiar problem with my Vmax. It was the Vboost computer for mine. It is located under the Left side scoop and is a small black plastic box with a round electrical connector. They are very expensive new. I got my replacement on ebay for around 75.00 dollars. I hope this helps.

Jul 28, 2009 | 2000 Yamaha V-Max

1 Answer

Poor exceleration with a top speed of only 60, no restricters fitted, year 2002 model, chassis no. HYX07172, engine no. 4NH 007172, how do I get more power


Need some more specs please cc Make & Model Etc?

i dont know how to solve this but my friend does he gets 95mph out of his and say's he could get 120mph, and diddnt cost much.

I'll pop back to this post soon.

P.s. Nice bike shame about the speed I know how you feel
*mad & gutted probabbly*

Steve

Jul 15, 2009 | Yamaha XV 535 Virago DX Motorcycles

1 Answer

Vmax vboost not working


Hi, Allwardr for this scenario you will need your service/owners manual if you can't find the best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
VBoost problems VMaxForum net
boost not working
Yamaha VMX12H Supplementary Service Manual
OEM parts for Yamaha
YAMAHA VMX12 Owner Manual

Jan 28, 2009 | Yamaha V-Max Motorcycles

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