Smoke on starting


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Playtex11

Smoke on starting

Post by Playtex11 »

Of late when doing a cold start, the engine sometimes blows blue smoke from the right exhaust (80 SS stock twin exhaust). This clears in a few moments of running. Sometimes, it does not smoke at all on cold starts. Never smokes on a hot start. Can't detect any oil usage on the dipstick. Both hot and cold starts are instant and it runs well. Is this something horrible or best just left alone? :?

Considering selling the machine but the smoking may be an issue for buyers.

Thanks to all who answer.

EMS
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Re: Smoke on starting

Post by EMS »

Symptoms are that of a small, slow oil leak into the combustion chamber when bike is parked. Most likely through the valve stem seals.
Not a terrible thing, but something that comes with age and is part of a proper engine overhaul.

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NobleHops
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Re: Smoke on starting

Post by NobleHops »

My bike does the same, also uses less quantity than I can measure. Has done so for 8 years. 155 PSI Compression.

My advice is for you to enjoy your excellent motorcycle.
Nils Menten
Tucson, Arizona, USA '80 CBX, sort-of restored :-)

Playtex11

Re: Smoke on starting

Post by Playtex11 »

Thanks Nils. That was pretty much my fallback plan. May go to conventional 20W50 with a shot of Lucas stabilizer on next service. Running Synthetic in it now. The smoke is just an aggravation.

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