Join Date: May 2009
Location: Indiana/ Michigan line at the Lake
Got one for my CV40 on the Sporster and it was a headache from
the beginning and never got dialed in right. I messed with it on and off for a year
before going back to stock other than keeping the needle in. Ran great but had
flat spots in the rpm band, and gas mileage was in the toilet. (Yes, I know my carbs
For a hotrod engine they are great. For a KLR, the general consensus is to install a
needle that fits the KLX, and stay stock on jetting or up one size on the main. Enrichening
the idle circuit, and the aggressive taper on the KLX needle are all we need. You didn't make
a bad choice. It's our engines. They just don't make enough power to justify the upgrade
when all we need is to sweeten up the lean factory setup which has to pass emissions testing.
Yes, go up one notch. Idle screw out 1 3/4 to 2 turns from gently seated.
I don't have any other useful advice. When I was on the HD tech forum most
of the guys didn't like the end result either.
I'd say keep fiddling with a few settings till it smooths out. You're pretty close it seems.
This is my son, with whom I am well pleased." ----God