Honda-SOHC

I have a big lawn and a gallon of unleaded doesn't last long. I've certainly never put two-stroke in it!

However, who knows what the LOL (little old lady) put in her lawnmower...

Could crap fuel really have that effect?

Works OK in the mower...   

My blue FZ was running perfectly before I ran out of petrol the other day. I knocked on the door of the nearest cottage and a little old lady said "My late husband had a Triumph" (I was wearing my Triumph jacket) "we went all over Europe on it in the 30's"...

She gave me (wouldn't accept any payment) a gallon of unleaded from her lawnmower can and I started it up and rode it home. I added more fuel from my lawnmower can.

One week later it has proved impossible to start. Not even firing.

Removed all the plugs. All black and wet so cleaned them all and it struggled into life on 3 cylinders.
Number 1 chimes in every now and then but smokes heavily and backfires through the exhaust.

Any ideas?

Yes.

To pass the MOT, all fitted lights must work.

The P position is for "park" and should light the little (5W?) bulb in the headlamp as well as the rear light.

I was so cool.

I had an open face helmet and used to pick my girlfriend* up from her school and give her a lift home. No kit - just school uniform and a spare helmet 

* we've been married for 29 years in August   

I also have no photos of that bike 

Hey, I was 17!

Me too (blue and white CB125S that is...)

Mine was an "L" though - can't remember the whole number 

Elegant.

I assume that it is stainless?