Hello motiztab,

I am starting to agree with you on the need for a push/pull style throttle. I really see no reason to use one, it seems as if the stock Paso pull style is good enough- the mikuni's have a strong return spring.

I am working on a little contraption to retain the stock choke mechanism as well. Right now I am using a mocked up aluminum bracket that can be easliy made with a pair of sheet metal shears (I will post pics and a how to when I am done). This piece will allow the choke mechanism (the sliding bar) to be used with the stock cable (with some added hardware.)

As for the air box, I haven't decided on what to do. The clearance is such that the 900 inlet runners (as you mentioned) are too long, so I fabricated a new set in my shop. This puts the Mikunis and a slightly sharper angle than the 750/600 runners and are not as long, giving me some added room. My plan is to put the tank in place, cover the carbs with some plastic wrap, and spray an insulation foam (here in the US it's available at any hardware store) and allow it to harden between the tank and the carb. Its a very brittle foam so once is dries I can remove the tank and the foam will take the shape of the area between the carbs and the tank. This will allow me to make a mold for an airbox to be made out of fiberglass or carbon fiber.

Hopefully I will have some pics soon and I will post the link to my website so everyone can see the process.

Cheers

Update
well I have got the carbs mounted up now,rejetted with 140 main and 5c19 needle set to 3rd notch from top with nylon washer and metal washer.
Bike runs again now just awaiting the new throttle cable and to make a new airbox, then I can check the mixture etc.