After passing my test yesterday & going out for the first time today I noticed I had no power, on closer inspection only cylinders 1 & 2 are working!

I have spark and fuel at all 4 cylinders, so I'm lost as to what's wrong! I have removed the plugs (they are brand new) and they all spark, as far as i can tell fuel is getting in, i removed the carbs and the inlet was wet with fuel, she backfires like a bitch!

I really want to get out on her and have some fun! also is there any chance that the regulator could cause this?

Any ideas welcome

If you're getting fuel and a spark I would try swapping the plug leads on 3 & 4. They may have got mixed up and you arent sparking at the right time. Hope that makes sense.

firing order is wrong or timing is out.

Good info fellas,
I got the bike as a non runner but got her going in the end but only on the 2 (stripped the carbs, new bat/plugs and the fuel pump relay was goosed)
Was reading through my haynes manual and the guy before me must have muddled them up! had 6 of us around it today trying to figure out what was going on!

Cheers again.... top info!

"6 of us around it today trying to figure out what was going on!"
waaaaaay too many cooks in that kitchen....

Yea... the scary think is we are all aircraft engineers in the RAF!