Hitchcocks Forum

Firstly thanks to Mark for all his help so far.
I have a 1949 RE 125cc that will start cold but once it's been running for 5 mins or so and the engine has warmed up it will it start again.
this bike is fitted with an Amal 223/001 carb. Does anyone know if this carb has mixture screw or other adjustments.
Any ideas are very appreciated.

Also I have mixed the 2 stroke fuel at a 50:1 ratio. is this correct for this engine?
David

David, I've found a Parts Book for this model and it appears the carb does not have either a throttle stop screw or mixture adjustment, my apologies. This means you will need to set the throttle slide resting height by using the cable adjuster on top of the carb. 50:1 for modern 2 stroke oil sounds ok but original instructions will be for a much stronger mix, just for now you could use 32:1 until you've run it enough to be confident. Finally, can you re-read your posts before you send them, I don't know what you mean by your comments about re-starting? Also, have you got a Parts or Instruction book yet? These will answer a lot of questions!
REgards, Mark

I had exactly this problem with my old Villiers two-stroke. From cold it would start easily,run perfectly,tick over nicely but once stopped when hot it would refuse to start again unless you could bump start it fast enough[or get some kind person to push you]. The trouble was its 50+ year old flywheel magneto whose magnets were not what they once were and the coil may have been breaking down when warm.My solution was to fit a modern ignition coil and battery which produces a big fat spark hot or cold and so no more starting difficulties. Even if your bike doesn't have a charging circuit you can easily get a days running from the battery alone. By the way I don't use modern two-stroke oils but prefer to use the oil it was designed to run on at 24/1. all the best.

I had the same with my GPO BSA Bantam and when i was ordering some parts i mentioned it to the supplier who is very knowlegable on these bikes and he told me that even if i had only stopped for a couple of minutes that i should give the carb a couple of jabs on the tickler because of evaporation. I thought that sounded a bit strange but tried it anyway and it worked and does so every time. My first bike in 1957 was a R E Ensign PAR 136, £23 second hand and HP over one year. slide rattled like buggery and the bulbous exaust kept falling off the cylinder.