If you do not have holes in your cowl to permit cooling air in and the expanded air (heat expands air) out, your engine will burn up. That is not covered under warranty.

You are expected to make a pretty good size hole in the front of the cowl, so that cooling air blows onto the cylinder. Then you are expected to make a hole two to three times as large somewhere in the rearmost part of the cowl to let the expanded heated air leave the area. Yes, it might ruin the looks of your model in your eyes, but that is what has to be done, or the engine won't run well and it certainly won't last long. Good luck.


Ed Cregger