Tatanka, Where are you located.....looks like it might actually be Buffalo country. A bit of wobble at the CS sprocket is normal. However, you should know that the output shafts are NLA from Honda as a spare part. That means taking VERY GOOD CARE of the one you have is important. The Red Cap is probably good insurance even though not exactly cheap. Conventional wisdom here is to use official Honda CS sprockets and make certain your chain is adjusted to spec or even on the loose side of the spec. And for you with an extended rear suspension I would go so far as to get the chain adjustment perfect. ..put the bike up on a stand so the rear wheel is off the ground. ..disconnect the rear suspension linkage so you can move the swingarm up and down ..use a tie-down or other strapping to raise the rear wheel so the CS sprocket center, the swingarm pivot center and the rear axle center are all in the same line (a simple string line works for this) ..the chain will be at it's tightest point when all 3 centers are aligned ..then adjust the rear wheel so the chain slack is removed but can you can still spin the rear wheel without binding. ..reconnect everything and re-measure the chain slack with the bike on the side stand.....this is now your personal chain slack measurement. I use a sharpie and write it down on the swingarm so I don't forget. Send us a photo of the spines if you'd like other eyes on the area. As for the off-idle stumble, I'd start by replacing the pilot jets. The orifice size is so small that even a good ultrasonic carb cleaner will not normally clean these jets well. If your home altitude is not over 3000 ft or so, you might also consider installing #40 pilots rather than the standard #38. Carb sync is always a good idea. You'll need the appropriate manometer and a long #2 phillips screwdriver to access the balance screw through the intake tube hole. Be patient....the adjustment is very sensitive and even the weight of the screwdriver on the screw head will alter the balance. Unless the carbs are way off 1/4 turn should be all you need for balancing....normally less.