82 Virago questions - Yamaha Forum : Your Yamaha Motor Products Community & Resource
 
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post #1 of 4 (permalink) Old 04-10-2009, 08:11 AM Thread Starter
 
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82 Virago questions

Just bought a 82 virago real cheap cause the guy didntknow a thing about engines. He said he was riding and all of a sudden it had no power.

It fires and runs just fine on one (the front) piston but the rear cylinder wont fire at all.

If i put my finger over the spark plug hole its got compression and suction but I lost my compression tester so the first thing im going to do is buy a new one.

If I pour fuel into the cylinder it wont light up but it does get a spark when i test for spark.

If I put my hand over the front carb throat I feel suction. If i put my hand over the front carb vaccume line I feel suction.
On the rear however I feel no suction on either is there a reed valve or something in these engines that was maybe installed improperly or something?

What can I check over?
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post #2 of 4 (permalink) Old 04-25-2010, 09:27 AM
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check if he put resistor type plugs into the bike bought one cheap also and the problem was it had the wrong plugs in it
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post #3 of 4 (permalink) Old 08-11-2010, 08:55 AM
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you got lucky
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post #4 of 4 (permalink) Old 08-20-2011, 06:00 PM
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You could have a vacuum leak at the intake manifold after the carb which would cause your lack of suction at the carb but you would still have compression.
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