[Big Ben]

I installed my Mikuni HSR last weekend and spent the last week riding around with a goofy grin on my face.(Thanks CD!)

The installation went smoothly and it runs great as it is, but I'm a little confused by the tuning instructions. The manual says:

1. If the best idle is achieved with the air
screw less than one turn out, the pilot jet
is too small and should be exchanged for
a larger one.
2. If the engine speed does not slow after
two-and-a-half turns out, the pilot jet is
too large and should be exchanged for a
smaller one.

Does this mean that closing the screw makes it richer?
My experience with the mixture screw on the CV is that closing the screw makes it leaner. Was I mistaken about the CV or is the setup different on the Mikuni?

[Mike Garey]

the idle mixture screw on a hs42 is a air adjustment not a fuel adjustment as on the stock carb and most after marcket units .Hope this helps,Mike

[hotroadking]

Yes you are correct it's an Air mix screw.

[Big Ben]

Thanks Mike and HRK!

Now I can start on getting the tuning just right.