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Author Topic: Yamaha XS360 problem?  (Read 1966 times)

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jollyroger

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Yamaha XS360 problem?
« on: November 23, 2009, 05:23:51 AM »
I have a '76 Yamaha XS360. The motor spins, backfires and shoots gas out of both carbs. Will not start. Any ideas? I have run out of them.

Thanx for ANY help!
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Offline BeSeeingYou

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Re: Yamaha XS360 problem?
« Reply #1 on: November 23, 2009, 05:06:30 PM »
What is the story on the bike.  Was it recently running, rebuilt, or a new acquisition?  Valve clearances out of whack and or cam chain off by a tooth or more. 
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jollyroger

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Re: Yamaha XS360 problem?
« Reply #2 on: November 24, 2009, 05:09:37 AM »
I bought the bike a few weeks ago. Owner sez that he had not ridden it in a while. Started it but seem to run on one cylinder. Was riding down the street and the other cylinder seemed to kick in. Stopped at STOP sign, bike died and would not start. I have set points and timing(I think). Also, have adjusted valves(I think).I have checked compression. Needle bangs up to 110-120 and slowly sinks down. Both carbs have suction. ??? 
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Offline bryanj

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Re: Yamaha XS360 problem?
« Reply #3 on: November 24, 2009, 06:57:50 AM »
If the points are worn the springs can short out on the point cover try removing that and seing if it fires
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Gregorymoto

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Re: Yamaha XS360 problem?
« Reply #4 on: November 24, 2009, 09:07:02 AM »
76 Yamaha XS360, i did not know Honda made that.
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Yep, i have issues with this sort of stuff.

jollyroger

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Re: Yamaha XS360 problem?
« Reply #5 on: November 24, 2009, 10:37:55 AM »
They only made a few! :P 
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