Question about 1981 Yamaha XS 400 Special

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What kind of gas should I use for my 1981 yamaha 400 special.

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  • Yamaha Master
  • 41,726 Answers

Hi, John 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 $ 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.
What Gasoline should use
https://yamahaclub.com/forums/topic/8435-xs400-what-octane-level-should-i-use
YAMAHA XS 400 1977 1982 service manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xs-owners-manuals

Posted on Dec 26, 2016

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 3567 Answers

SOURCE: tyre pressures

Look around the tire and you should find the max inflation pressure for the tire. The pressure info will be smaller than the tire size info but it will be there somewhere.

Okay, that is the max pressure. It is probably 45psi. Try 45 psi and if you want a bit softer ride go to 40 then 35 then 30 until you find the inflation pressure that gives you the desired ride without being squirrely. I think 35psi is where you will settle.

Please rate this answer. Thanks!

Posted on Apr 01, 2009

landsend
  • 1066 Answers

SOURCE: gas all the way to carb but will not start if you

The floats in your carbs are stuck...rebuild the carbs and clean them.
Every Hoover I've had has two screws on the bottom that you remove.  Then you lift off the cover and you pry out the brush roller. The new belt goes with one end on the motor shaft and the other end on the humped roller part on the brush roller.  Good luck it's a bit of a struggle but you can do it.

When you receive advice from this website you have to understand that without the item in front of us, we are only able to provide "a best guess" as to what the problem might be based on you description of the defect.  If you haven't described a clear and precise description of the defect you decrease the chances of an accurate reply.  Thank you.   

Posted on Apr 29, 2009

  • 10865 Answers

SOURCE: need wireing diagram for 1981 yamaha 400 special

get the clymer yamaha motorcycle repair manual for 1981-2002. it will be twenty bucks well spent.

most book stores carry it or you can go to a motorcyle shop or on the internet at clymer.com

Posted on Jun 26, 2009

sisadsl
  • 1508 Answers

SOURCE: lose power, backfires, stalls, pull choke out it

clean the carbs, could also be something in the fueltank, also remove and clean the fuel tap.
When it stops next time turn the fuel tap to PRI, in case the fuel tap need a kit.
also open the tank cap to see if it has vacumn, the vent may be blocked

Posted on Apr 24, 2010

nedkelly900
  • 345 Answers

SOURCE: 400 SPECIAL CHARGEING PROBLEM!

your alternater has died. there is two metal brushes in there that you can replace. if the engine dies when you take the positive off, then your alternator is not working at all. I had the same problem with my XS 650 special.

Posted on May 20, 2010

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1 Answer

Why is gas coming out of my carb on my 1981 xs400 yamaha


your carb floats are sticking&needle valve,causing fuel to run out the overflow line on carb,the carbs need to be taken apart & cleaned

May 13, 2014 | 1981 Yamaha XS 400 Special

1 Answer

What type is gas should I use for my 1981 yamaha 400 special?


What ever the owners manual says
Call a dealer that sells them & ask

Jul 24, 2013 | 1981 Yamaha XS 400 Special

1 Answer

What kind of gas should I use in my 1981 yamaha 400 special?


You should be able to use unleaded but do not use ethanol treated gas. If you are unable to get ethanol free gas, then look at getting an ethanol treatment for your bike. Ethanol will play havoc with your entire fuel system gaskets and rubber hoses.

Jul 24, 2013 | Motorcycles

1 Answer

What kind of oil should i be using for a 1981 yamaha xs400?


There's such thing as motorcycle oil. Its formulated for motorcycle engines. I'd go in to an auto parts store and ask exactly which weight oil to use for your engine.

Jul 09, 2011 | 1981 Yamaha XS 400 Special

1 Answer

My 1981 yamaha 400 special will start, (sometimes) but will not stay running for more than a minute or so, any ideas?


Is there gas coming from the gas line? Its sounds like you need a new spark plug maybe even a carburetor cleaning. Thats my guess.

Jul 29, 2010 | 1981 Yamaha XS 400 Special

1 Answer

What kind of oil do you put in a 1980 Yamaha xs400 special?


castrol engine oil which has a colour lokie dark red

Jun 12, 2010 | 1981 Yamaha XS 400 Special

1 Answer

400 SPECIAL CHARGEING PROBLEM!


your alternater has died. there is two metal brushes in there that you can replace. if the engine dies when you take the positive off, then your alternator is not working at all. I had the same problem with my XS 650 special.

May 20, 2010 | 1981 Yamaha XS 400 Special

1 Answer

Need wireing diagram for 1981 yamaha 400 special


get the clymer yamaha motorcycle repair manual for 1981-2002. it will be twenty bucks well spent.

most book stores carry it or you can go to a motorcyle shop or on the internet at clymer.com

Jun 26, 2009 | 1981 Yamaha XS 400 Special

1 Answer

1981 Yamaha XS 400 wiring diagram


Hi, Mr_iceman_de 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 $10 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.
1981 Yamaha XS400 wiring diagram Google Search
Yamaha Motorcycle Wiring Diagrams
Yamaha XS400 1977 1982 Factory Service Repair Manual PDF Download Manuals... $10
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xs-owners-manuals

Apr 02, 2009 | 1981 Yamaha XS 400 Special

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