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Honda CB750/900/1100F SuperSport Website: SuperSport Forums


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DirtyT
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Joined: Nov 05, 2009
Posts: 414
Location: East Bay, Calif

PostPosted: Mon May 18, 2020 3:12 am Reply with quote Back to top

After a long hiatus I am beginning to work on my bikes again. Back in 2010 or 2011, i bought a blue 1100F from a member living in the Monterey / Seaside area of Cali - his nickname on this forum was nu2honda. I was so anxious to buy the bike (and it was a late night sale), I neglected to get any history on the bike. It had 60,000 + miles on it and has run very well.

Is there anyone here who remembers him that could shed some light on this bike?? 60,000 mi. seems like a lot for an air/oil cooled engine to me - I'm wondering if it was ever rebuilt? Appreciate any info I can get - have tried Search and not come up w/anything useful.

Thanks, Ed
 
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f4fast
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Joined: Jul 09, 2005
Posts: 21926
Location: Long Island,N.Y.

PostPosted: Mon May 18, 2020 3:19 pm Reply with quote Back to top

May I suggest taking a compression check to learn about the health of the engine?

Do Routine maintenance like cam chain adjustments, then a valve adjustment, then do that compression check.

Compare those numbers with other known 1100 compression numbers should tell you what youíve got.

You could pull the oil pan and clean out debris and look to see what type oil change maintenance the bike received as well.

At 60k I would expect cam chain adjuster wear with petrified rubber guides at a minimum.

I think these engines wear valves faster than bores, but thatís just an opinion Iíve gathered from reading others accounts that had more experience building multiple engines.

As far as finding anecdotal accounts of your particular bike, that may be tougher.

_________________
1983 cb1100f (blue)
1980 cb750f original owner (black) 
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cntrhub
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Joined: Nov 23, 2004
Posts: 1453
Location: Kansas City, KA.

PostPosted: Mon May 18, 2020 4:10 pm Reply with quote Back to top

What fasty said. Especially dumping the oil pan. That's clutch wear caked in gray. A chance to clean the oil pump screen, and see how big something was trapped from being chewed by the oil pump blades.

Find things like, a wrench made corner marks on the flats of the engine mount bolts. That shows you if they yanked the engine out. Exhaust header bolts is another clue... if stock exhaust along with the rear muffler hanger bolts. Those have to be removed for bottom end engine work or top end work.

Top of the engine case bolts under the carb body; see if the case was split... looks virgin, no need to look at the engine to frame bolts. Setting/checking valve clearance for the comp test, look at the head stud nuts (if not outside the cover) and see if sockets left any marks.

Open the pleats of the oil filter cartridge. Look for brass particles. This more shows insert wear or needs a closer inspection.
 
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DirtyT
Hawk
Hawk



Joined: Nov 05, 2009
Posts: 414
Location: East Bay, Calif

PostPosted: Mon May 18, 2020 6:28 pm Reply with quote Back to top

Thanks very much for the tips, esp. those re marks/wear on the bolt heads & engine casing. I've cracked open several motors and know well what a PITA it is to get the cyl block off w/o destroying the fins - I also have seen the shocking deterioration of the OEM guides and tensioners. When it comes time (there are 4 bikes ahead of this one), I'll find out just how worn this motor is. Thanks again, Ed.
 
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