Question about 1993 Yamaha Xv 250 Virago S

3 Answers

Not sure why my bike wont start

I just bought this bike its a 1981 yamaha virago 750, i put 800 bucks into it and it started for the mechanic but i cant get it to start at home. I know he said the starters on the viragos tend to go bad but i'm not sure if im even starting it right. do i need to hold the clutch down plus the choke to start the bike?

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  • outbreak40 May 21, 2009

    i've already had the carbs rebuilt with a new battery by a motorcycle mechanic. it started for him. he even rode it 8miles. i cant get it to start here at my house. he tired to tell me that the starter is bad and i have to take it back to the shop so he can work on it more. I'm just afriad that i've been duped.

  • Anonymous May 25, 2009

    i dont know how to write and get help so here i am. I have a yamaha virago. battery appears charge. Clicks but will not turn over. what do i check?? Wha is clicking? it is down by where you put oil in. I wouls think it is the starter? I dont know.

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How long did the bike set un-used? After years, gasoline turns into varnish after evaporation of the aromatic hydrocarbons. I've actually seen a substance like molasses in all the carbs and the gas tank. Take a bowl off of a carb and see what you find. If it has gone to varnish, you will need to disassemble every component that gasoline touches as a liquid and re-build and clean out the gunk. (yes, gas tank too and the diverter valve) This is a common problem.

Posted on May 20, 2009

  • Bob Taylor
    Bob Taylor May 21, 2009

    Do you have an ohm meter? I don't believe in 1981 there was any kind of clutch safety switch in the circuit, but I'll see if I can find a schematic and let you know. If you have an ohmmeter, disconnect the negative battery cable. Test between the end of the cable you just removed and the positive lug connector on the starter. If it's open, (no resistance) the windings or brushes are shot in the starter. Did he tell you starter or solenoid? you can also take a battery charger, 10 amp might do it, ground the black clamp on the battery (hooked back up) and carefully touch the red clamp to the main starter lug input, where the single large cable goes through the starter case. If it turns over, the starter is fine. You just have to trace it back through the circuit and find the bad part, But look on line for an owners manual. Normal start procedure should be there. This could be a bad starter, but that's not a high failure item. Hope you get it... Too much choke in warm weather could flood it. You might also try some either if you have spark once you get it to turn over.

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Using oils that exceed the 1981 specifications could be too slick for the starter clutch to grab. I first noticed my clutch slipping / rattling after I used Mobil One, Mobil 1 oil, thinking I was making an improvement, I suspected the wet clutch and starter clutch which is immersed in the engine oil didn't like the extra slippery qualities of Mobil 1 and so I put something like 10/40 or 20/40 Castrol GTX in the engine and the starter started performing much much better, occasionally if the cranking RPM's get too high or engine gets hot it will slip and rattle but I release the starter and wait until it stops to try again. Holding the button down for any length of time while it's slipping is going to ruin the starter clutch more.
With continued proper oil and use it may improve altogether.
It may be difficult to find oil with 1981 ratings by SAE as they are replaced by newer oils which are slipperier and supposedly backward compatible.

That's my story. I have a 1982 Yamaha Seca XJ-750, I saw it on the cover of a Hot Rod magazine along with a Shelby Mustang and I figured it's gotta be HOT if Hot Rod is endorsing it, I bought it a year later and still have it, 11 second quarter miles, 2 valve technology and no radiator or chain drive to mess with.

Roger P.

Posted on May 21, 2009

  • rcpenny10 May 21, 2009

    I'm sorry, you didn't describe if the starter was cranking, rattling, clicking or doing nothing at all before I commented and I assumed your problem was the same as mine which is a rattling, slipping starter clutch. I am having this problem because I just used 5/30 SM oil and it's too slippery for the starter clutch bearings to grab the starter shaft.

    I checked the owners manual and it states 20/50 SAE Grade SE motor oil, I couldn't find SE grade at Autozone and thus settled for SL which was their lowest quality now superceeded by SM. I bought the least known brand with the hope it will have the lowest quality.

    Now using the heavier 20/50 SL oil the starter clutch works more reliably and only occasionally rattles which I hope will improve over time with proper use.

    If I find an oil closer to SE standard I will buy it.

    I have never seen anyone state this theory before and felt I had to mention it. I have had 8,000 miles over 10 years of proper operation since that day I put Mobil 1 oil in the engine and experienced my starter clutch slip and fixing it by putting another oil inside.

    Roger P


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I have 1982 xv750 all connections are clean ground is good but no spark when turning over would a bad silnoid prevent spark ?

Posted on May 26, 2009

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SOURCE: schematic diagram of a 1981 yamaha 750 virago carburetor

Should get a good view of it by downloding free manual at
carlsalter.com...good Luck to you friend...Tim

Posted on May 13, 2009

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