Paul,
 Other than Tracy's PSRU what options do I have?? Do you have a preference and why??
 At this stage interested in a muffler, but will confirm.

 Neil Unger.

 Not many options for PSRU's.

 I was in a motorcycle shop buying parts for our Ninja motorcycle
 and I noticed the forged aluminum rear cog belt sprocket on a lot
 of V twin Harley motor cycle copies. That may make a good part
 for a belt reduction drive. You might need two side by side.
 Ken Welter uses a 3:1 belt reduction drive on his Coot.

 Paul Lamar


 As far as PSRU's go for Cog belt, I think the northwest aero pulleys were and are the
 best. Light weight, anodized and built for really high horspower. I have two sets I
 cannot use, ( I am doing a vebelt drive for reasons of vibration damping). If your are
 interested I can supply pix, data. They are 2.17 to 1, which may not work for you, and
 they are built for 400 horsepower, but they can be cut down very easily. They use gates
 belts.

 On another note , Paul are you against gear drives since you mention harley clone belt
 drives on motorcycles ?

 Lionel

 No but Neil is in Australia which might make one of Tracy's drives very expensive.
 The belt drive is an alternative. I prefer gear drives. The draw back to
 belt drives is they are rather bulky in the 3:1 range. A very large
 pulley is required.

 Paul Lamar

        
Don't I know it! My driven pulleys are 21.25 inches to be
driven by 7.37 inches for a drive to handle 180 horsepower using 5-5vx belts !
 Lionel

Ken Welter puts 300 HP through this drive to get out of the water.

Paul Lamar