Speedfight real wheel seized up

Yeah. Sluggish right.
I forgot the lack of hills in the fens.

 

Just picked the speedfight up, nice to be on it after the oh so boring kisbee. Bit confused though, this is what is says on the invoice (just had time to look at it) - 'bike would rev up and not accelerate found to be worn pully so replaced pulley. Kickstart retaining collar MISSING so has no kickstart.' Total invoice amount 139.60. So the reason the bike would not accelerate is because the rear wheel was jammed. Anyhow nice to get it back and I have no idea why the retaining collar was missing but I've booked it in for new collar to be fitted on Monday. So £4 for the collar and £50 for the labour. Need to be done though. Quick question for anyone who maybe able to help; the bike is pulling strongly to the right if I take my hands off the handlebars. Any ideas? It wasn't like this before. Tracking maybe?

 

Front brake binding?
Dodgy wheel bearing?
Put it up on the stand and feel the front and rear wheel to see if the have any play.

 

good thinking

 

Could be part of that front swingarm thing that is worn out.