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Author Topic: bike rolls then locks up -76 CB550  (Read 684 times)

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Offline Ms Tokyo

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bike rolls then locks up -76 CB550
« on: December 09, 2020, 10:47:27 AM »
haven't ridden the bike in awhile.  last thing i did was adjust valves, timing and cam chain.  also had stator and rotor off, cleaned up and reinstalled.  today moving around in the garage in neutral it rolled about 6 feet and locked up.  thought it was the rear brake but it is not.  put bike on center stand and rolled rear wheel with same result.  did the same in gear.  thoughts?
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Offline flatlander

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Re: bike rolls then locks up -76 CB550
« Reply #1 on: December 09, 2020, 11:02:00 AM »
my first thought woud be that something went wrong while you worked on it... did you already check if everything was done correctly, and that you didn't accidentally disturb something while working?
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Offline Tim2005

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Re: bike rolls then locks up -76 CB550
« Reply #2 on: December 09, 2020, 11:25:01 AM »
Have a look at the chain, maybe there is something caught in it that stops it going onto a sprocket
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Offline newday777

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Re: bike rolls then locks up -76 CB550
« Reply #3 on: December 09, 2020, 12:04:51 PM »
Check the front brake
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Alan F.

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Re: bike rolls then locks up -76 CB550
« Reply #4 on: December 09, 2020, 01:34:19 PM »
I can't say that I know much about 550s but failing all of the above you may want to double check your valve adjustments, hopefully a valve is not contacting a piston.
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Offline Ms Tokyo

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Re: bike rolls then locks up -76 CB550
« Reply #5 on: December 09, 2020, 01:35:25 PM »
Bingo Tim. A random bolt must have fallen off of the workbench and was laying perfectly on the chain. Problem solved. Should’ve already looked there but I was worried about gear issues.
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Offline ekpent

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Re: bike rolls then locks up -76 CB550
« Reply #6 on: December 09, 2020, 02:47:10 PM »
 Better buy a lottery ticket as that issue you had with a bolt falling and or laying on your chain somehow and wedging the bike has to be very rare indeed.
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