air box holes

[b1rks]

drill holes in air box. Stupid question but whats up with that. Where n why i suppose i know why . What i dont understand is why air bx setup not up to spec.bottom screen not good enough.

[DiverRay]

If you have a K&N or stock air filter, you can flow more air with a few hole drilled in the PROPER LOCATION in the air box. The filter flows the air from the INSIDE to the outside, and then into the carbs. The location and size of the holes would be the CENTER of the bottom half of the airbox, and about 4 to 6 1/2" holes.
If you want to do this, remove the lower half of the airbox, as if you are cleaning the filter. Look down at the mount for the filter, and drill so the holes are in the CENTER of the filter. This will help a little with the breathing, without the noise of pod filters.

[b1rks]

air box holes

yes i have KN air filter n Keirker exhaust {if that matters} Another possibly stupid question Will increase air flow effect carb settings.To rich to lean?Disrupt balance.

[DiverRay]

It will lean it out, but just a little. I also have a kerker and K&N on Daily Ride. I've set the jetting for the kerker. so it runs well. Check you spark plugs if in doubt, but it should not change the carb sync. setting at all.

[randy]

On my 81 special, the PO had drilled out the airbox and it ran so lean that it pinged at WOT on hot days. Installed washer under each needle and ping went away.