Overall Rating: * * It's always cool when a part is designed so well that it functions exactly like the original part while hiding another vital component. Unconventional design requires the necessary components of a motorcycle, but it's fun to wonder about how a builder put the pieces together when it appears as though a vital segment is missing. Tauer Machine's three-inch open belt primary was designed with that thinking-the oil filter is hidden between the belt and pulleys and the outer cover doubles as an oil cooler. We wanted to see how Tauer's open belt drive worked, so we went over to Freedom Cycles in Orange, California to install the drive on a late model Evo custom. RATING GUIDE ABILITY * * TIME * TOOLS * * * COST * * * * 1. Devin and Kazoo, a couple of the techs at Freedom Cycle, had the original primary off and all the oil drained from the late-model Evo custom in record time. All the mating surfaces were cleaned and readied for the backing plate.1. Devin and Kazoo, a couple of the techs at Freedom Cycle, had the original primary off a 2. The original oil filter mount, filter, and hoses were also removed. 3. Depending on the dimensions of some custom frames, the seat tube may interfere with the inlet and outlet nipples from the backing plate. Before mounting the plate, check for oil line clearance.3. Depending on the dimensions of some custom frames, the seat tube may interfere with the 4. These chrome-plated nipples are half an inch shorter than the brass pieces in the last picture. Once we measured the proper hose length, they were clamped to the fittings.4. These chrome-plated nipples are half an inch shorter than the brass pieces in the last 5. Pull the oil lines from the backing-plate through the frame to the pipe side of the bike.5. Pull the oil lines from the backing-plate through the frame to the pipe side of the bik 6. Don't forget to use red threadlocker on all the backing plate fasteners. 7. Bolt the backing plate to the transmission... 8. ...and the engine. 9. Fill the oil filter half-full of oil, and run a thin film of new oil on the gasket surface of the filter.9. Fill the oil filter half-full of oil, and run a thin film of new oil on the gasket surf 1 | 2 | » | View Full Article Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!