1978 CB550 Pieces/Parts Hellride

irk miller

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A running condition CB650 engine appears to be a rarity. That said, I think I have something to work with, barring anything crazy on the inside of this one. I have 115 psi compression on 1/4, 155 psi on 3 and a dropped cylinder on 2 @ 60 psi. Why no compression remains to be seen.




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Maritime

Active Member
Valves all set ok? I know you probably checked that but all it takes is one to be ever so slightly too tight and they will stay open just enough to piss away the compression.
 

irk miller

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Maritime said:
Valves all set ok? I know you probably checked that but all it takes is one to be ever so slightly too tight and they will stay open just enough to piss away the compression.
Compression jumps to 155psi when I put oil in the cylinder.
 

irk miller

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Maritime said:
OK, that means rings, maybe just stuck rings though if you are lucky.
I thought I said that. LOL. I know it's rings, but to what extent I don't know.
 

irk miller

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Had to machine down an 18mm socket to pull the 2/3 plugs


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pidjones

Active Member
Had a similar nice surprise this morning on the '79 GL1000 that came home weekk before last. A Dyna 3 looking in good shape. Might swap it over to the Hunley next summer if the Ford TFI experiment I have planned doesn't work.
 

cxman

Active Member
those are stock pulse generators for the cb650 sohc it uses the complete ignition and charging system for the dohc 750s and 900s and the same wiringharness

igniters and reg/rectifier
 

Kanticoy

Mad Science!
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I just found this thread and had to subscribe. I really dig this project. You smell like butthole.

(Has to insert the customary insult into our thread conversations as per norm.)
 

irk miller

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Kanticoy said:
You smell like butthole.
(Has to insert the customary insult into our thread conversations as per norm.)
Finally, it gets real up in this joint.
 

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