Hi, i recently purchased a 1996 CBR 600 F3 from a friend, the bike needed work, it didn't run and it sat for a bout 2 years, i pulled the head off and brought it to Honda to have it cleaned up and have the valves reseated, but in the cylinder walls there is light rust in two of them, how can i go about removing the rust without damaging the cylinder walls.

P.S. i was told to use CLR but i'm a little hesitant cause i don't know if its corrosive and any help would be greatly appreciated. Thanks.

 

How deep is the rust? Id use wd40 and a shop rag, or fairly coarse cloth. A hone is nice if you have one and have it torn down enough to use it. If there are pits, you may be screwed.

 

The rust seems not deep at all, and what ever rust there is its very minimal and at the top of the cylinder, as for pitting, there is but very so slightly, to my eye it looks like it wouldn't cause to bad of a problem but what do i know.

 

If those walls are pitted you need to get that thing honed out. If you are lucky the rust won't be so deep that you will need to resleeve the jug.

 

+1 for having the cylinders honed, it will help the rings seat properly as well as get rid of some light surface rust and minor pitting.

 

Like said already,try a wd-40 soaked rag. If that doesent work,try some fine grit sandpaper.

 

i guess i'm going to try some fine grit sand paper because i dont have the skills necessary to take the motor apart to use a hone, i wish i could though cause then i would change the rings as well.

 

I wouldn't use sandpaper!
The cylinder is precision machined for a reason. Your just asking for problems with lose of compression and burning oil doing this.
Get a good shop manual and tear the engine down so it can be honed. It's really not that difficult and will be well worth it in the long run.

 

I do have the clymer tech manual for this bike, but if i tear it down im afraid i wount be able to get it back together and ill have a motor in pieces for who knows how long.....

 

I've done it several times with no ill results. Get some wet/dry 800 grit,spray it with some WD-40 and lightly "wipe"it around the cylinder wall. IF it removes it,great. If it's pitted,well then that's his decision what to do.