Go to the "Tips and tricks" section on here and go down to the 4th post...."Crank seals for dummies"...good info.
You will have to get 4 things....
1) Proper clutch puller....here is one place that carries them;
https://www.mfgsupply.com/725-068.html2) A decent flywheel puller.
(if the clutch and flywheel have never been removed, they can be stuck on the crankshaft really tight.)
3) A torque wrench. The shop manual will show the proper torque and tightening sequence for the bolts that hold the crankcase halves together. Doesn't have to be a fancy one, I continue to use an old Craftsman beam type.
4) A good crankcase sealant. As is mentioned in the "Crank seals for dummies" post, don't ever try any type of RTV Silicone, I don't care what color. That stuff will start to dissolve in the presence of gas or oil and turn to jelly. I use Threebond 1184....pretty widely available. I think Yamaha and Kawasaki still make good sealants for this also and dealers would probably have it.