Hi Carl-Erik.
Sport scout flywheels ( as Harley 45) are not mirror images, the taper to face on the left wheel is slightly offset with regards to the crankpin and drive pin faces. T&o sets of two rhs wheels for 101s were set up so that the this was taken into account for the left wheel, Paul sent me a drawing explaining this. We found that the wheels were making up 20-30 thou too wide for some of the crank pins available, so they adjusted them a little so the outer thrust washer faces were more acceptable. Some crankpins still make up a touch wide, sometimes we need to surface grind thrusts down to .030 " externally, using as much as 070 -80 thrusts around the conrods. This leads to an acumulated error on the drive pin too, sometimes leaving the gear too far to the left. We are finding a variation of approx 030-040 " make up in some readily available crankpins over originals. Hope this explains it, if not , will try again after another morning coffee :)
Just for more info, the original open webbed flywheels weigh 8.5 lbs each, the solid sport scout ones 10lbs each. This leads to more torque but a slower revving motor with the solid wheels. Open webbed wheels run smoother, spin up quicker, but need more use of the gearshift when climbing steep hills. Keep meaning to try turning down the outer face of the new ones to see how they go. With a standard static factory balance, I have found that the open webbed flywheels have a sweet spot for touring at around 55 miles per hour, the heavier wheels seem to like to sit at around 48 mph for smooth revs in top gear. Again, would be interesting to play around with balance factors, but time and money etc etc ...
