New carbs advice please.

[Dibble]

Hi all,I  find myself in a dilemma regarding changing from the oiginal monobloc carbs fitted to the 67 hornet to new premier concentrics. Not been able to obtain amatching pair of 389/689 originality is out. Cost of new monoblocs is high compaired to premiers. My question then is what would you good people do?
Am i right in thinking that jetting is  different than original  and the cables may be different? Any thoughts you have are most welcome.
Dave.

[DAVE BRADY]

Hi Dave,

Try Surrey Cycles. Very helpful and will jet the carbs for your bike.  The cables will vary a bit as the fitment on the slide is different.

Dave.

[Allan G]

The jetting change shouldn't vary by much, but the main jet on a concentric is around 20% smaller than its monoblock equivalent.

If you have a set of monoblocks already consider having them refurbished.

[Dibble]

Thanks gents, the monoblocs are shot! The 689 has gone completely porous and beyond repair. I cannot even find a decent used one! The joys of restoring!
Dave

[EDDIE SIMPSON]

you can still use a 2 x 389 monobloc carbs. monoblocs are a better carb i think.

[Dibble]

Thanks Eddie that looks like the way! To hell with the expense!