Blue smoke, left exhaust.

[skidMark]

Forget it then The dynastic gentleman is right, just an aberration. A bit of smoke on starting is meaningless on a mature bike.

I like it how you call old bikes mature, its your way of saying your bikes like fine wine. instead of more like leave the lid open on a bottle of coke and see it loose it's fizz.

[xwhatsit]

Theses things have oil ways with rubber seal/o-rings which get hard with age. Valve guide seals that do the same. When was the last time the head was retorqued?

I re-torqued it when I was doing the valve clearances maybe two, three months ago, in an effort to stop the slight oil weep down the side of the barrel. The two centre bolts turned a degree or two, don't know if anything changed since then Magua?

In short, don't stress just yet -- check the oil every day (you should be doing that anyway, it's a 1970s Honda), make sure it's not all disappearing out your zorst.

[Magua]

1980s honda I check the oil very frequently, loosing some but not too much. Head gasket needs replacing, torqueing made a slight diff, but seemed to be back to normal pretty fast. I'll get onto econohonda.

[motorbyclist]

sounds like an oil leak from gasket or leaky stem seal on an open valve dumped some oil in the cylinder... i expect bikes to smoke a bit when they start after a period of disuse anyway

but, seeing as the oil would be leaking out at all times, it would likely be the exhaust valve/s on that cylinder if the smoke has since stopped

only one way to find out. open her up, replace the rings, head gasket, valve stem seals, reseat the valves while you're at it, check for cracks in the head and then call it fixed for another 50000km

or do what we did with our old ttr250 with heavily worn rings: write "puff the magic dragon" on the muffler and only use it on windy days
damn thing burnt more oil than pertrol!

[klyong82]

What? 5 years being stored outside? Started first press of the button and ran like a beaut after we put a new batt in. Rings/Bore probably got a bit rusty, or it was just that its getting on in the age/k's department

And what brand bike does ya old man ride? Bulletproof engines!

[CookMySock]

haha, "fill up the oil and check the petrol"

DB

[Bonez]

haha, "fill up the oil and check the petrol"

DB

Hmm I do that on the CX