cb 77 engine stuck???

waynew · Post by **waynew** » Sun Oct 10, 2010 8:46 am

started my cb 77 this am as i usually do letting it warm-up for awhile. Idled perfectly for several minutes then the engine suddenly quit making an almost "squeaking" sound. As I went to kick start it again, it seemed as if their was too much compression to kick it through-its as if the motors stuck. oil level was fine before starting it up this morning. I ride this bike daily and performance, compression, etc. is always great. any ideas you can share would be greatly appreciated. thanks to all.

Snakeoil · Post by **Snakeoil** » Sun Oct 10, 2010 9:15 am

Sounds like seizure, but could be something broke. If cam chain broke you could have crashed piston tops into valves. If oil pump quit, it might have seized. I'd drop the oil pump and see if it is functioning properly and if the oil screen is clear. Could be the pump was working, but starved for oil.

Sorry for your pain. At least it happened in the driveway at idle and not 100 miles from home at speed.
regards,
Rob

LOUD MOUSE · Post by **LOUD MOUSE** » Sun Oct 10, 2010 9:27 am

Just a couple of ideas
It may be something came loose in the clutch area and jamming things in there.
Ya may want to check the starter assy. behind the rotor.
Ya say it had a "squeaking" sound and that may have been one or more of the screws loose and jamming the starter sprocket.
Also see if ya can turn the bolt at the rotor counterclockwise to see if it will loosen and allow ya to check things. ..........lm

waynew wrote:started my cb 77 this am as i usually do letting it warm-up for awhile. Idled perfectly for several minutes then the engine suddenly quit making an almost "squeaking" sound. As I went to kick start it again, it seemed as if their was too much compression to kick it through-its as if the motors stuck. oil level was fine before starting it up this morning. I ride this bike daily and performance, compression, etc. is always great. any ideas you can share would be greatly appreciated. thanks to all.

waynew · Post by **waynew** » Sun Oct 10, 2010 5:48 pm

thanks guys for the advice. everyone's help is truly appreciated. i am sick over this to the point of grieving.

ricksd · Post by **ricksd** » Sun Oct 10, 2010 7:24 pm

It's not too likely that a well maintained engine with plenty of oil would suddenly seize without any warning signs- it may not be the end.

nander · Post by **nander** » Tue Oct 12, 2010 8:28 pm

I recently experienced a similar motor seizure. I'm going to post some pictures of the engine internals in another thread. But, basically I was riding along and everything seemed to be working right, but after a three mile journey the motor shrieked and died. I was in first or second gear, not going particularly fast. When I tried to restart it, the starter motor seemed unable to turn the engine over and I had similar problems with the kickstart. I told someone the story and they said I had "hot seized" it.

It's truly a pain in the ass. I just try to look at it as an opportunity to build a better motor.

nander

nc_rider · Post by **nc_rider** » Tue Oct 12, 2010 9:24 pm

Snakeoil wrote:... If cam chain broke you could have crashed piston tops into valves. ...

wait.. are all 305s interference engines? If so, that's good to know.

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cb 77 engine stuck???

cb 77 engine stuck???

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