i run with 1 ounce blendzall ultra 455 and 2 ounces of lucas land sea and air per gallon. during winter or below 50 degrees, i switch too 3.5 ounces of lucas and no blendzall. i can beat the living tar out of my motors with the first blend. they run great but require a top end cleaning a few times a year, really easy to do. makes everything last a long time. i switch because i'm not sure blendzall 455 formula is cold weather capable. when you first fire up your bike, don;t let it idle very long. do a quick put around the block, like 5-10 mins. then shut it off when it gets good and hot. let it cool all the way to the point you can hold your hand on it and not get burnt. now check you nuts on the motor mounts for tightness. then snug the head bolts ( not crank them down, just nice and snug) in an x pattern. then jump back on it, go for another 10-15 min run, but this time, crack the throttle a few times, like really get on it. do that at few times at least, but don;t hold full throttle any longer then about 15 20 seconds, or till it wraps up good an high in the rpm range. don;t idle to long and vary the rpm around quite a bit the first tank. it's gonna run kinda poopy at first, but thats ok, you're breaking in the engine. setting the rings and the seal pattern on the jug wall, so they seal good and tight. do this till you finish the first tank. second tank, just ride it like ya would, but vary the rpms a bit, never one rpm for to long. then the engine will ask you for a new jet for the carb ( really easy to change, just a phillips screw driver and a flat head), or find the mix of oil and fuel the engine likes with tht jet. you can do tht with the plug readings you'll learn how to take soon. anyway, i could write a book about these engines, yet it's all in this forum written by people far more experienced at this hobby than i.
yes the jackshaft can be added anytime. it's a great piece of hardware to have if they are legal in your area.