^^^^^^ Best way to go. Honda 400ex throttle housing, trx90 thumb lever, E-Z pull springs for the carb slides with 2 coils cut off the bottom, new throttle cable lubricated generously. I have 39mm PWK's, and aluminum had to be welded to a few areas of the housing. After that was done, I took a dremel to the inside and removed material away so I could get full range of motion on my lever. Best setup IMO.