Airbox boot repair?

AtLarge wrote: You might want to Google 'Moog mod' and save some trouble.

would the moog mod work for an 83 kz440 d1 ?

Can't say for sure without doing a little research on your part. The later model 750 twin had BS34 carbs so I would expect yours are slightly smaller. Also, the 750 airbox had rings that would allow the bellows to be clamped in securely. I don't see that on yours and you would want a tight fit without air leaks or it defeats the purpose. I would imagine there are smaller rack and pinion boots out there or you might even get by with front fork boots from a smaller dirt bike but again, you would have to look around to find sizes compatible. A force fit with the softest radiator hose cut down may be your only hope.