Topic: Greetings from another Toronto member

[BigB]

So the story goes ...

Been into bikes for 15 years, owned approx 12 in that time - some for riding, some for rebuilding. Along the way I purchased a 1982 cb650sc bike-in-a-box 6 years ago, rebuilt and sold it. Fast forward to last fall, the gentlemen is letting it go and gave me a call. I'm now the owner of my own rebuild, which is of course now scattered in parts across my back room - engine out, head off, pistons soaking in pin-sole - Ready for phase 3.

It started it's life as a cb650sc. Low compression & gumbed up carbs but was soon running like a champ. I picked up a tank & a few bits and turned it into a standard/custom. Hopefully the pics work.

This is pic is after being rebuilt as a nighthawk

[BigB]

Second pic as a standard/custom.

[BigB]

And finally, the inspiration for the winter project.

[BigB]

Of course with any new member, there's gotta be a question ....

Cyl #3 REALLY smokes (sitting on the bike, from the left, the cyl with the tach cable). It gets worse once warmed up. It's light grey so thinking oil. Compression was good - 120 all round. Carbs synced perfectly and ran like a champ. I was thinking oil ring, but once dismantled, all looks good, nothing sticking.

Any thoughts?

And thanks all. I've been running VFR's & big cruisers but find myself doing more local runs so thinking that a nice mild scrabbler/cafe would be a nice fit.

[calj737]

Valve seal or seat? Have you done a leak-down test?

[BigB]

No leak-down test as was planning on doing the valves anyway, but thanks, will do my own version of the same and see.

I was thinking that compression was consistent so was really expecting a failed oil ring.

Heads are off so I take some seafoam and let it sit in the cylinder head overnight; any leaks and there's your answer - at least that'd the concept.  Of course don't forget to screw in the plugs .

[Can550]

Welcome Big B, from GTA


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