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 Cylinder pressures - 4v or is it 8v

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Don Abbondio
Don Abbondio

Posts : 22
Join date : 2015-12-19

PostSubject: Cylinder pressures - 4v or is it 8v   Thu Oct 11, 2018 12:27 pm

I was wondering what a good average cylinder pressure test would read as I use to take the pressures on my old Trident which gave me a history and when to sort it out. [that was 150,000 miles for new rings and a hone, it had been dropping over a period]
As I did not do this previously when I got the Guzzi and have only just started I am interested in knowing what figures I ought to expect [I realise that there will be variances]?

Does the pressure alter depending on flat tappets and roller?  Does the valve clearances make a difference too as there seems to be 2 values of clearance that can be used on the 1200's [belive 0.1 and 0.15 are the ones].
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Pete Roper

Posts : 5672
Join date : 2013-05-29
Age : 61

PostSubject: Re: Cylinder pressures - 4v or is it 8v   Today at 5:48 pm

If running a standard compression test a healthy 8V will pump up to between 165-180 PSI.

Remember to remove the TB's or unhook the injectors and coils and then hold the throttle wide open while allowing the bike to crank.

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Cylinder pressures - 4v or is it 8v
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