Question about 1976 Ducati 860 GTS
I have an 860 GT and is about due for a top end rebuild. Prior to dismantling what should the compression pressure be in an 860 GT, for example 155 PSI
You're asking a BAD question in my opinion. I'll explain, and give you a FAR better solution... Compression checks in my opinion are fine for checking from cylinder to cylinder ONLY. If you're within 10 psi plus or minus, you're fine. However, cylinder LEAKDOWN will tell you if you've got an issue. You may have good compression, but any compression readings will not show leaks in the valvetrain unless the leak is pretty bad. I would instead test cylinder leakdown both cold and hot using a leak down tester, a good air compressor with a good regulator, and if you have anything worse than 85% in a leakdown test, use your ears to find the air leak. If the leakdown says for example 70%, listen in the exhaust and through the carbs. If both are quiet, listen in the oil fill hole. Now not only do you KNOW how bad the issue is, you know right where it's at. Intake valve, exhaust valve, or piston/cylinder. the Stick
Posted on Dec 10, 2009
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Posted on Jan 02, 2017
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