Help!

[Raz Mcgruff]

Fat Jeff at the gym took a look at it and he took the fuel tank off and poured the diesel into his WW2 Jeep. He says I need to run it on paraffin for a couple of days but now it wont start..any ideas?

Sounds like the the spark plugs aren't sealing properly and the diesels syphon back up the HT leads and settled in  the coils.

You're going to have to disconnect the plug caps, and try to suck the diesel out of the coils.
You  find the diesel comes easier if you can get somebody to turn the bike over while you suck,