1988 CBR600f Compression Question
 

Hello
I am looking at buying this bike. current owner said it will not run and he is not sure why. unit has a title which i really don't care about. I really only want the motor out of this bike. is there anything major that goes wrong with these motors? i assume they would be pretty simple being an older Honda motor (correct me if wrong please). i am planning to go look at the bike tomorrow Sunday 09-16-2018 so any help tonight and early tomorrow will be wonderful. What should i look for? I was going to check compression and i seen in another post the min should be 125psi and max around 150psi. but the guys said WOT i can not seem to figure out what this mean. But I am not the best with motorcycle stuff or really auto stuff either. Im more a heavy diesel kind of guy https://cbrforum.com/forum/images/icons/icon10.gif.

Or if someone has a service manual that would be great i tried to get the one off of this site but does not seem to want to open for me, i can only seem to find the manual for 1999-2000 and im sure thats why different being over 10 years newer.


Again any help would be wonderful.
Thanks in advance
Joey

WOT means wide open throttle. That means you have to have the carbs completely open to allow air into the cylinders.
125 psi is the lowest I would go on this motor. 150 is perfectly sealed up. If it is over 150 that is a good indicator of raised compression. It could be different pistons or a milled head.
If you are sub 120, drop a few drops of engine oil down each cylinder. If it comes back up it can either be worn rings or just dried out from not running for a while.

https://www.bikebandit.com/manuals-t...al-m439/p/8380

https://www.bikebandit.com/manuals-t...al-1730/p/8377

First result, can maybe find cheaper elsewhere or ebay.

Thank you guys.
I just could not get figure out WOT. im kicking my self i should have gotten that ha.
Do these motors have a compression release on them to start? i know i had an old ealy 80's 3 wheeler that i had to rotate this little are on the block to release the compression for the pull start. not saying i will have to do anything for the release on these but does that effect the numbers at all? I have a compression gauge so i can check them one at a time.
So tell me if i have any issues im my plan here. i will go look at it and with my compression tool and socket to remove all plugs. take all 4 plugs out then crank the bike with WOT and see where the needle lands? doing the same for 1-4 holes.