Help- running on 2 cylinders
I ordered (used) oem ICM and IPG. Looks like the IPG has been discontinued and I can't find anyone with a new one.
While I wait for the parts I tested the cilynders for compression and it is as follows #1 175psi, #2 170psi, #3 158psi, #4 162psi. Are these in acceptable ranges? The bike has power and for a 1996 that has 39,000miles. Can anyone confirm my compression is good/acceptable?
While I wait for the parts I tested the cilynders for compression and it is as follows #1 175psi, #2 170psi, #3 158psi, #4 162psi. Are these in acceptable ranges? The bike has power and for a 1996 that has 39,000miles. Can anyone confirm my compression is good/acceptable?
The specs for 1993-1996 CBR1000F compression is anywhere from 149-206 psi / 400rpm.
Those are all within 5% of each other. I'd say you're good.
Those are all within 5% of each other. I'd say you're good.
Last edited by IDoDirt; Jun 23, 2022 at 10:11 AM.
Three things for a compression test:
1. Engine hot
2. All spark plugs removed.
3. Throttle kept fully open during each cylinder test.
IMHO, those readings, if taken with the above conditions applying, suggest either that there is some wear in the piston/bore, or that some valves are not sealing correctly.
I've read that if you add a little oil into a cylinder and retake the compression reading (for a cylinder that is indicating low), you'll get one of two outcomes:
1. If the compression reading goes up, there's piston/bore wear
2. If there's no change to the low reading, there could be valve sealing issues
Food for thought.
Cheers,
Dennis
1. Engine hot
2. All spark plugs removed.
3. Throttle kept fully open during each cylinder test.
IMHO, those readings, if taken with the above conditions applying, suggest either that there is some wear in the piston/bore, or that some valves are not sealing correctly.
I've read that if you add a little oil into a cylinder and retake the compression reading (for a cylinder that is indicating low), you'll get one of two outcomes:
1. If the compression reading goes up, there's piston/bore wear
2. If there's no change to the low reading, there could be valve sealing issues
Food for thought.
Cheers,
Dennis
Last edited by dmoh; Jun 24, 2022 at 12:33 AM.


