When our late friend and forum member Jim (XLR) Carpenter passed away he left 3 of his bikes to a mutual friend of mine and Simons named Chris Rudy. One of the bikes, (an XLR), Jim was in the final stages of assembly and he had built it as a stroker motor.
Chris had been invited to the spring TT race in Peoria where they were having a twins race to show the crowd what the big bikes use to be like before the AMA downsized the series to the singles. I ended up only having two weeks to get the bike ready actually only fired it and Chris rode it up the street and back and we loaded it in the truck for the drive from Calif. to Illinois. We got there unloaded and fired it and the Tillotson wouldn't run much passed 3rd throttle which as it turned out was all the 5 plate (dry) clutch would stand anyways as it started slipping. I'm hoping the HD Barnett plates and springs will hold this torque monster. Anyways Chris ended up finishing 12th out of 16 so it wasn't a total loss. There's always next year.
Anyways back on subject. What did you find as optimum for ignition timing? I set it at the 48 degrees as per my manual.
Yep, that's what I've got in my XLRTT!!! I know for sure cause I kept for a while timing the mag on the slash and it kept overheating, that is until I put a degree wheel on it!!!