Question about 1980 Yamaha XS 400

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How do i adjust the valves on a 1980 yamaha xs 400?

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  • Yamaha Master
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Hi, Seth 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.
checking setting valve clearance
How to set the timing on Yamaha XS400 motorcycle
Yamaha XS360 Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xs-owners-manuals

Posted on May 31, 2017

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Posted on Jan 02, 2017

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ginocussen
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SOURCE: i just got a new clutch cable for my 1980 yamaha

check there are no kinks or sharp curves in the cable, that it routes cleanly. Otherwise you need to look further at the clutch itself.

Posted on May 04, 2009

  • 93 Answers

SOURCE: how do I set the timing and ajust the valvs on my

the only way to change the valve timings are to adjust the iming chan=in(by removing or adding links) or to change to a different camshaft that can be retrofitted from another bike of same caagory.

Posted on Aug 05, 2009

  • 623 Answers

SOURCE: Need to know how to sink my carbs and adjust them

Do you have a synchronizing tool? If not, you'll need one, either homemade or store bought. All what synching the carbs means is that they are both pulling in the same amount of gas and air based on manifold vacuum pressure.

Posted on May 24, 2010

Suzman
  • 642 Answers

SOURCE: 1980 yamaha 400 xs starter spins engine doesent turn over

The starter clutch needs to be replaced. At the other end of that chain is a wheel with a couple slots cut at angles. Inside each of these slots is a small cylindrical piece of metal. The whole unit fits over the end of the crankshaft and because of the angle of the slots those cylindrical pieces of metal (which move freely in the slots) will be forced against and grip the crankshaft when the starter is operated. If they become worn down they are no longer able to exert enough pressure on the crankshaft in order to turn it. Buying a starter clutch 2nd hand is not recommended. If you are unable to source one from a bike shop, try and have them made. Take the old ones to an engineering shop. Unless you know how to temper/harden metal of course.

Posted on Jul 26, 2010

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1 Answer

What type of oil for 1980 yamaha XS400?


I have a a 1978 xs1100 and i have used almost any motorcycle brand 10W40. Has worked well in all my bikes From a 250 cc to 1400 cc.

Jun 04, 2014 | 1980 Yamaha XS 400 Special

1 Answer

How to set timing on a 1980 yamaha 400xs


Hi, Anonymous 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 $0 you can download another one. 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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http://mybikemanuals.com/yamaha/yamaha-xs-owners-manuals

Apr 24, 2014 | 1980 Yamaha XS 400 Special

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Timing specs for 1980 yamaha 400 xs


Hi, Anonymous 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 $0 you can download another one. 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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Apr 24, 2014 | 1980 Yamaha XS 400 Special

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Hi, Anonymous for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. 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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Nov 17, 2013 | 1980 Yamaha XS 400 Special

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1980 Yamaha XS 400 Special wiring diagram


Hi, Anonymous 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 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 links below. Good luck and have a nice day.
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Jan 09, 2013 | 1980 Yamaha XS 400 Special

1 Answer

I have a 1980 yamaha 400 special and it seems as if the engine is starving for gas it will only run with the choke on. i have put the floats to where the manual said to but it still starves for gas any...


  1. check the fuel shutoff valve to make sure it is not clogged.
  2. check the jets in the carb for clogging
  3. check coil for proper voltage
  4. check spark plug gap and check end for sluge
hope this helps

Jul 15, 2010 | 1980 Yamaha XS 400 Special

1 Answer

What is the gap for the sparkplugs 1980 Yamaha sx 400


if the last digit on your spark plug is a 8 then it would be .032 if its a 9 then .036, 10 =.040. But if you buy your spark plugs new they should all come pre-gaped.

Apr 08, 2010 | 1980 Yamaha XS 400 Special

1 Answer

How do I set the timing and ajust the valvs on my 1980 xs 400


the only way to change the valve timings are to adjust the iming chan=in(by removing or adding links) or to change to a different camshaft that can be retrofitted from another bike of same caagory.

Aug 05, 2009 | 1985 Yamaha XS 400

1 Answer

How do i begin adjusting the carbs?


1st-clean air filter and oil,fresh plugs,good fuel,valves adjusted correctly,check for tears or cracks in intake boots,fire in all cylininders;minimum compression & w/in10% of each other in all cylinders, and no exhaust gasket leaks. once these components are w/in specs. and operable the carburators can be adjusted, as long as they are internally clean and operating as designed.1st- set high idle, then set idle rpm, now synchronize vacuum on carburator set,now readjust idle rpm.

Feb 19, 2009 | 1980 Yamaha XS 400

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