jon686 said:
"Jet" removal (the jet the threads say is not needed)
Carb tuning ( which screw does what)
Where to buy aftermarket sprockets and what size "works"
Who has instruction/sells part for the "hidden gear" mod
Oil injector block off for premix gas
I hope the replies help others in the future. Thanks in advance.
Jet removal=remove carb. take off float bowl. big jet in middle is main jet. smaller jet is pilot jet. after open you use a flat blade screw driver and turn counter clockwise and the jet unscrews.
carb tuning=big knurled nut with flat slot is idle adjuster. small screw is the air/fuel screw. search this site for sparky jetting guide not in this section.
Many articles online for 2 stroke jetting that are adequate. Basics are same for every 2 stroke motorcycle.
oil injector block off=remove oil pump. build your own blocking plate or remove drive gear from pump and reinstall. then follow tube up to carb on the side where the oil goes in and solder, braze or epoxy the nipple closed.
hidden gear= this is the first gear that is officially hidden. directions are in this section under 1st gear mod jr50 but its fairly simple. remove the right side cover. you'll see that the shift lever has an oblong slot. it goes from center to one direction. grind the slot in a mirror reflection the other way.
I seem to remember that you have to split the case to remove the shift shaft so you cannot easily replace it if someone had one for sale. It goes through one of the shift forks... You have to grind from the center back towards the rear wheel.
sprockets=sorry cannot help on this one. I seem to remember someone mentioned where they could get one in the zillion pages of info on the 1st gear mod but not sure.