Not really any special tools needed besides a spring compressor for your secondary spring in your clutch assembly.depending what all is wrong with your motor,you can get a complete 650 less carb for around 2600 dollars.My 06 prowler 650 was ran low on oil and now make a noise that sounds like piston slap. Are the rebuilds hard to due and are special tools needed.
How many miles on your motor,I know the new crate motors have all the updated parts bevel gears,oil pump driven gears,ect.just keep looking around for prices,most forums wont let you mention any company's that are not site vendors.SorryI may just buy a new motor depending on what I find with the old one. I hv not found a motor for less than 2900.00. Where can I find one for 2600?