So I bought a non running f4i, owner stated that it has 12k miles, title says it has 3700. It has been dropped a few times, which is apparent with all of the bent levers and pedals. Stator cover is so badly scratched its cracked and PO slapped a bunch of gasket maker on it to prevent leaking. I got it for a really good price, just missing some hardware for the fairings and the rear seat and some other small things.

anyways, I didnt have a battery to do a compression test it and went ahead and pulled all of the spark plugs out. I was able to get a compression tester into each cylinder and since I couldnt crank the engine.. drum roll..... I ended up putting a ratchet and socket onto the crankshaft bolt (is that what is under the stator cover? )

So I manually spun the crap out of the engine for each cylinder and came up with these number (unsure of accuracy)

Cylinder 1: 125
Cylinder 2: 130
Cylinder 3: 130
Cylinder 4: 125

There isnt much deviation between each cylinder and I feel good about the numbers but I would look some opinions about what im working with to confirm that I have at least a decent engine. Thanks for your input in advance

 

Those numbers are low, but that's to be expected since you turned it by hand.
To do it accurately, the motor needs to turn much faster.

 

Yes I also concluded that as well. I've read that rr's are around 178psi warm, are the f4i's about the same? Me and a buddy were laughing after I told him I know how the starter motor feels heh
I will retest next week when I get all of the fluids changed, other pertinent parts installed and a fresh battery in

 

thats actually pretty damn good considering you were cranking it by hand. doing the test properly you should get 160-170 if i remember correctly