Low cylinder compression

[SDDaytona]

Measured the compression on my new to me Daytona (16k miles) and got a measly 65lbs per cylinder. Bike is still running well and making plenty of power.. any reason not to wait a few more months before a rebore?

[m in sc]

you absolutely sure the gauge is accurate? 65 is pathetic, I rebuild at 90 ish. I got bit by a low reading gauge once, I'd verify it's accuracy 1st

[teazer]

you absolutely sure the gauge is accurate? 65 is pathetic, I rebuild at 90 ish. I got bit by a low reading gauge once, I'd verify it's accuracy 1st

I found that a lot of good looking economy priced pressure gauges read low. I have several good gauges that I use, but you also have to pay attention to the throttles which must be wide oen and did you kick it once or keep kicking until it peaked - typically 5 or 6 kicks?

[1976RD400C]

Make sure your gauge has a schrader valve right in the piece you screw in the spark plug hole.

[danketchpel]

you absolutely sure the gauge is accurate? 65 is pathetic, I rebuild at 90 ish. I got bit by a low reading gauge once, I'd verify it's accuracy 1st

Do you test hot (running temp) or cold?

[SoCal250]

Do you test hot (running temp) or cold?

cold

[Pravin]

65 is very low , if the bike is running well then surely the gauge is not accurate , 120 125 is the start on stock and 90 is the bottom line I guess..

Get the readings with some other gauge and check !

Cheers,
Pravin