BVF30N3-1

[Andy_C]

OK I give up.

Carb seems to have very little wear, new jets throughout, fuel level correct, recently ultrasonically cleaned - i.e. nothing wrong with it as far as I can see.

Starts and runs well and yet no amount of adjustment will get rid of the surging, adjusting the air screw and bypass screws affects the pick up drastically, but has little or no effect on tickover and / or surging.

The surging is making what is a nice little bike to ride a very upleasant experience.

I know there are various threads about carbs / surging and have read most of them, also made loads of carb adjustments but I cannot tune the surging out.

I have other 2 stroke bikes (Kawasaki Triples) and they respond very nicely to tweaks of the carbs, unlike the MZ.

30mm Mikuni the way to go ?

[Skorpion]

Hi Andy_C .

See if you can get hold of the earlier Carb 30N 2-5 as this is easier to tune, you need to get a reliable tick over around 1000 rpm or less, it can be done
then you will have virtually no surging .

[DAVID THOMPSON]

suzuki 750 2 smoker "water buffalo "was a nasty ride in traffic if the carb was not correct

[Andy_C]

Hi Andy_C .

See if you can get hold of the earlier Carb 30N 2-5 as this is easier to tune, you need to get a reliable tick over around 1000 rpm or less, it can be done
then you will have virtually no surging .

And probably cheaper than a 30mm Mikuni !

Problem will be finding an old one that is not worn out, unless I can find a N.O.S item.

[Andy_C]

suzuki 750 2 smoker "water buffalo "was a nasty ride in traffic if the carb was not correct

As is my 1974 H2 - very unpleasant if it starts surging but easy to reliably tune out.