I knew the N to 1 heavy clunk was due to clutch drag. What I didn't know was whether the Amsoil Super Shift would stop the clunk AND hold up to heavy heat.
My test this morning was starting it in Neutral, then let it warm up maybe 2 mins while I back out the driveway & put the gloves on. Then, pull in the clutch & into 1st without hesitation. Perfect. So far, the big clunk is definitely gone. There's still the usual (modest) Harley N/1 gear clash, which sounds cool if you ask me, but it's not like I'm hittin' the gears with a sledge hammer. I'm sure I could quiet it down even further by holding the clutch in for 3-4 seconds while the gears slow down, but I wanted to give it a real test. I'm tired of thinking about it every time I start off, and just want to shift into gear and go. WHY anyone would recommend Syn3 in the primary I'll never know. Harley could just as easy label their own primary fluid.
I gave 'er a good hard ride yesterday, to build up some heat, and it held up real well. BUT, nothing compares to a July/August ride through Arizona. Heading to Sturgis in 2 weeks -- I'll find out how the primary parts hold up to the extreme heat and report back.