the zerk is the fitting that your pumping grease into. it should unscrew from the arm. in the center of it there is a small ball bearing that keep the grease from coming out. make sure that the bearing moves inside the zerk. you should see grease come out from around the seals once the arm is full. also if you have old grease in the arms it is possible that it is hard and isnt letting the fresh grease into the arms
it will normnally take 10-15 kicks before the needle stops moving. at 70psi your motor shouldnt be running, and diffenatly not runing well. either you did the comp test wrong or your gauge is wrong would be my guess
dont bother with jet kits. buy the jets you need.
With stock carbs, airbox lid off and pipes around sea level your going to need around a 310 main, 27.5 pilot, needle 3rd or 4th clip.
if you dont need a spark arresstor get rid of the stock scilencers and get some to from DG. The stockers are very restrictive. Hell you might even look and see if DG offers Spark Arressters for theres if you need them.
Fatty's are for sure a cheap upgrade but your not going to get as much of a power gain as T-5's
T-5 are a good all around pipe. Also if you dont ever plan on getting port work the T-6 are not a bad choice as well, how ever the T-5 will respnd better to portwork if you ever get any done
i would just replace the 2 if in fact they need it. if they just have the surface rust on them i wouldnt try cleaning them up. your just going to expose the metal, unless you plan on sealing it. Also if you run antifreeze it can be very hard on metals. try switching to engine ice or watter wetter if thats the case.
is there a reason you want to replace them? if its because you have some buildup on them that looks like rust i wouldnt bother. your chancing that you snap a stud off and make alot more work for your self to replace something that doesnt need to be replaced. now if the stud is damaged or something then i would do just that stud and not all of them
this isnt exactly true.
there are a ton of factors to determine how much fuel the motor is going to use at WOT. Like if you put my Cub WOT against a stock port with pipes I would garanty you i would suck my bowl dry and blow the motor regaurdless of how well its jetted. the jetting will not make a differance how fast the bowl can fill up, they simply allow x amount of fuel into the carb body/motor at a given point of throttle
the first part for the longer bolt is correct, but the finger part is not. I run both of them and they are fine. I ordered several extra of the set screws if you need one.