Hello to all and I am new to this forum and wanted to introduce myself and comment about the wealth of information that I have seen here in the last few days of reading. Great place!. I just purchased a 1985 Vmax that is running but I found that it has an aftermarket device that has a hose that screws into the oil filler cap and runs up below the air box into a canister, then has two small filters coming out of it. The carbs are mounted, and the bike starts but I didn't see the Vmax Vboost system. I went through the parts boxes and found the lower unit that has the butterfly assembly, the control box is still mounted on the left side, but the servo motor is missing. I jumped the gun and bought a complete assembly on eBay. When I plugged the servo into the harness the servo motor didn't cycle through its initial stage, so I am going to test it and the control box this weekend. This is the year, color and the bike that impressed me when I rode it in 1985! I'm 56 now and have always wanted this bike, now I have it. Any help with this setup would be most appreciated as I'm not very sure why this bike has this crankcase breather system on it and why the Vboost was taken off and how it was by-passed. Thanks for listening!