OK TMF CREW
i think just looking at this photo below i might answer my own question.
i today tried to replace the needle and spring in my carb, but now i have a horrible high pitch squeal coming from the carb.
as the old needle was corroded into the piston (the washer thing on top of the needle ) i used the piston from another engine i had (assuming the 1 ltr carbs were the same) but looking at the picture below now i can see the float bowls are slightly different. it now makes a horrible screech. what could cause this ?? is it the wrong piston ??
many thanks for any help guys