here is alot cheaper kit,
http://www.ebay.com/itm/Honda-GX160...ltDomain_0&hash=item19d03e52ef#ht_1515wt_1223 some kits do not come with the charging coil to charge up the battery, it is not hard to install one of these kits, tools you will need is a 10mm socket extension and ratchet, i forget what size the nut is that hods the flywheel on i think it is 15/16 not sure, but you need an pneumatic impact wrench to remove it, then use a air hammer and a pry bar under the flywheel pry it off and jolt the crankshaft and the flywheel will pop off, then install charge coil and put on new flywheel bolt it on and take the guard off the front of the engine and bolt the starter on, some may need the control box for the low oil sensor re located, hook up control box re attach the shroud and your done, i may have missed some stuff but it is not hard to do