I switched from a screw cap Keihin 38 PWK A/S to the KTM Keihin 38 PWK A/S short body carb, this left me 20mm overall too short from the carb bell to the air boot. I did not want to run any reed spacers because the whole point is to get the carb closer in and I have only scene 1/2 inch (13mm) or 1/4 inch reed spacers, so I would have 2 reed spacers stacked, yuck . Thought about moving the air box and 86 air boot closer but then I would possible crush it if I bottomed out the suspension. Thought about 4 inch PVC spacer junk, then thought maybe I could cut down and re shape an LT500 air boot. All of these solutions might work but seemed half azzed. Then I remembered ESR use to sell a Mikuni TMX carb with a pressed on adapter ring. After a little searching I found a company called Mikunioz that sells a 62mm OD spigot adapter with 60mm ID thats 20mm long. This should work perfectly I hope.