CCM carburettor options

[Rosco86]

Have a 73 standard 500 with an Amal carb. Have a 76 500 motor to go into a flat tracker frame. Was thinking of using a mikuni carb on it. Just wondering if Grouty or Flower pot racing have used these and if so what would be a good starting point with carb size, jet and needle sizes. Thoughts from those with experience.
Rosco86

[sa63]

I have used a 34mm dellorto with very good results. can give you specs if you go that way..

[grouty]

I go with Sean on the Dellorto. Excellent carb. If you are fitting it in a 73 frame it is a pain in the arse to get it in. The rear convoluted joint between airbox and carb needs to be "fettled" to make it shorter. You may need to have a stub welded to the head to fit too.
I am happy with the 34mm Amal Mk1 on my 73 works bike, but the other one is getting a Dellorto. A new 32mm Amal is the way to go on a standard bore/stroke 500. Mine are both short strokers.

[sa63]

it was a tight squeeze on my 75 frame!

I have a welded on a spigot on mine. get it as close to head as you can.. 5mm closer would have saved a lot of knuckle skin for me!

[Rosco86]

Thanks Grouty and sa63 will go with the Amal. Not expecting any figment probs as it's going into a 1972 Trackmaster frame. Any advice re main jet, pilot and needle type?

[FourstrokeForever]

I run a 34mm Mikuni on my B50 and it runs sweet. The head has the spigot welded on to allow fitment. I found that by using a early Yamaha IT/YZ carb top cable swivel makes fitting so much easier and the carb can be mounted very close to vertical.