cns mounting

the carb has to seal air tight to the intake. if not it will suck air and run too lean. i have a cns carb and i used the spacer that come with it and it works fine.

I have two of the cns carbs with the plastic spacer and seal. One is on a billet intake from Jim and the other is on the old aluminum stock intake that I enlarged and smoothed the interior path. Niether one seems to want to tighten up properly. They will vibrate back then the bike runs lean and won't idle down. I tried rtv and other adhesives to glue them on but that only lasted 50 miles. My next thought is to push it on all the way and drill a hole for a lock screw that would thread and seal into the side of the intake and hold the carb all the way on. I am open for suggestions!

I use an aluminum foil spacer between the plastic spacer and the carb. Ruffed up my MM intake with sand paper and Permatex it all together. Solid as a rock.

You need to get a tiny file the metal notch of the CNS carb under the clamp and make the slot slightly bigger, else the carb does not clamp down right. (notch becomes closed before its clamped fully)