Block of the redundent cowl in take, it's doing nothing any way.

Try a baffle plate from the good intake as suggested above. You need to force the air "through" the cylinder. As you can see clearly in your photo, the air is going over the cylinder, not through it!

If that dosn't help (it will) try this...

because you have set the moki at an angle, cut a sub hole underneath the cowl intake, directly infront of the carb and cylinder head. This doesn't need to be big, infact it get less efficient (I run fully cowled YS 1.40s with an intake size if 1x2cm and a very big outlet area. Perfect) 2x3 cm will be fine. Try that for a while. Infact , that could work so well you may even block of both cowl intakes.


Remember to keep the nitro low ie.5% with a Moki