If you have to ask, you probably shouldn't do it...
I bought a cd service manual off ebay for $8.
Engine will need to come out of the bike so you can take the bottom half of the engine case off. you'll need to remove all the engine covers, and likely the clutch basket (so you'll need a clutch hub tool...and air impact tools help as well). Take the engine sprocket off before you pull the engine too.
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