Ideal compression, anyone?

[NickKnox00]

Would compression between 140-145 PSI be in the ballpark for a Nightshift cylinders or does that sound a touch off the norm?

 

[appletomato5216]

140-145 PSI might be a little below the ideal sweet spot. but it's not super low that screams trouble, it's worth observing though if you notice any performance issues.

 

[NickKnox00]

140-145 PSI might be a little below the ideal sweet spot. but it's not super low that screams trouble, it's worth observing though if you notice any performance issues.

Good to know it's not too far off the mark. I'll keep an eye on it and watch for any signs of trouble down the road!

 

[adamGB]

Between 140-145 PSI is generally within the ballpark for a Ducati Nightshift yeah and it shouldn't raise any red flags especially if both cylinders are close in value.
That said, factory specs can differ slightly depending on temperature, altitude and how the test was done, so its always good to check against the service manual just to be sure.

 

[5cramble0n]

I had a similar experience with my old Monster. Both cylinders showed around 142 PSI when cold, and although a friend mentioned it seemed a bit low, the bike ran smoothly without any oil burning or trouble starting. I looked up the factory specs later and found out that it was actually within the acceptable range for my altitude. The takeaway here is that as long as both cylinders are close in readings and the bike feels good, you're in a solid place

 

[NickKnox00]

I just saw these new replies. Thank you both for the detailed feedback. The cylinder balance and real world performance being more important than the raw number were correct. The cylinders were within 2 PSI of each other and after riding it all season, the bike runs perfectly.

 

[DirtTrailScrambler]

I recall looking at the compression on my Scrambler Sixty2 and noticing similar readings. It ended up being completely fine once I took into account the altitude and the fact that the battery was a bit low during the test.

 

[scrambledeggs]

I recall looking at the compression on my Scrambler Sixty2 and noticing similar readings. It ended up being completely fine once I took into account the altitude and the fact that the battery was a bit low during the test.

A low battery had me pissing my pants one time, thinking the engine is toast and luckily a very wise man told me to get a new battery and run the test again. Now I'd plug the engine int he wall socket if I have to.

@NickKnox00 we did a compression test for a buddy of mine and it was 130 to 133 psi and he drove the thing to the moon and back, so over 140 is perfect and you have nothing to worry about.