I have a 3AJ engine that I'm using as part of an offroad go-kart project. I don't have the original airbox.

I plan to use a pair of K&N style "universal cone" filters. Looking at the dimensions I don't think that I'm going to have space to fit them directly onto the carbs so I guess I'll need to run some kind of fat (50 - 55mm ish) hose to wherever the filters are mounted.

Has anyone done this mod before on their bike? How and with which filters?

Thanks in advance,

- James

I reckon you should go the whole way and fit a complete ram-air kit, complete with huge roof-mounted scoop!

Good luck with in Jimbo, and have a top christmas season mate.

you dont have to use K+Ns there are lots of other makes out there in all sorts of shapes and sizes, K+Ns are also about the most expensive! have a look in some websites, demon tweeks, pipercross etc, and hien gericke have some very good value ones.
you may have to re-jet the carb if you get the engine breathing better.

if you get it going can i 'ave a go, mister?

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dave

Did you ever get you engine sorted with some rubber pipes and air filters? Did you have to rejet? I am thinking of making the same sort of modification to my 3AJ so I can fit an aftermarket Acerbis plastic tank. I'd be interested to here from you, or anyone else who's don this or something like it!

Wow! This thread is from a while ago.

The engine still remains unrun and without filters fitted.

Interested in selling the engine and/or kart?