1982 Yamaha XJ 650 Logo

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Anonymous Posted on Sep 02, 2013

My 1982 Yamaha 650 maxim begins to rev around 4,000 rpm after it warms up for under 5 minutes. I have tried carb cleaner. Can anyone help?

5 Related Answers

Knight 007

Murtaza Akberali Versi

  • 767 Answers
  • Posted on May 06, 2009

SOURCE: no need help on how the jets go on my carbs on

please visit this site

www.xjbikes.com

;)

Knight. (yamaha seca XJ750 A 1981)

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Anonymous

  • 50 Answers
  • Posted on May 30, 2009

SOURCE: flaot setting for 81 yamaha 650 maxim (4 ea.)

# 1carb left 0.04+or-0.04 inches mm 1.0+or-1.0 # 2 carb right 0.08+or-0.04 2.0+or-1.0 hope this gets you there

jmgldsmth

Jim Goldsmith

  • 2005 Answers
  • Posted on Aug 02, 2009

SOURCE: I just bought a 1982 yamaha maxim 650 and was

Change oil and, filters regularly; lube the throttle cables and, all moving parts drain the fuel tank and, replace the fuel filter every year, or; when needed. never leave fuel in the bike when you store it without using "stabil" only check your ignition with a timing light get a maintenance schedule from the bike's manufacturer and, follow it.

Anonymous

  • 2702 Answers
  • Posted on Jun 26, 2010

SOURCE: My 1982 yamaha 650 maxim runs but misses on

have a compreshion test done on the engine first,,,if all is well there change the plugs for a new set and retune the bike up

czaa

Arnie Burke

  • 7339 Answers
  • Posted on Oct 25, 2010

SOURCE: i have a 1982 yamaha

retighten engine on frame affter getting torque values from a shop manual--the fork area shud be looked at also

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Related Questions:

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I have a 1982 yamaha 650 and it revs up for no reason any suggestions

Many things can cause it to rev up. Here are a few suggestions
1. Broken, open or damaged vacuum lines or related components

2. Broken/leaking rubber carb spigots(holds the carbs on the engine)

3. Carb sync screws(normally located between the carbs) where turned and carbs are out of balance
2helpful
1answer

I have a 1982 yamaha maxim 650when i try to go over 65 it feels like its revs strange like its going to vibrate but it dosent

Hi,

These engines tend to resonate right around 4.5k-5k rpm. Originally they came equipped with rubber bushings between the engine cooling fins to absorb the vibration, but at this age, they are probably long gone.

It sounds like you have a normal XJ. Beyond that midrange buzz, it should pull like crazy right up to redline.
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I have a 1982 yahama 650 hard to start cold if you spray carb cleaner on a rag & cover the intake it will start & run. But you can crank & crank otherwise. It fires & runs for 10 to 15 secs...

There were a couple of different carbs fitted to this era of bike. One of them has a diaphramme that works a 'fuel pump' system and floods the carb as the throttle is opened. They will split and cause problems.
0helpful
1answer

1982 Yamaha Maxim 650 Has trouble starting: on a good day i can turn the choke midway and it will fire right up, but i have to roll the throttle back and forth to keep it running. after a few minutes...

These bikes need the carbs ajdusted rather frequently, once they get out of adjustment the they juste don'e idle good. Also as old as this one is I can guess that you may have some air leaking around your some of the gaskets and this is why after it warms up it runs better, the gaskets get heated and the swell a little and then start sealing better. It would do you good this winter if you replaced all your intake and carb gaskets and get the carbs adjusted by a trained technicianan you will be ready to roll when summer comes around.
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