Typically carbs only need synched when you separate them from each other (mostly). I think save the $70 - you'll spend it elsewhere. If you just remove carbs (as a pair) to change jets - do not typically need synched.
Hello all! I'm hoping to find time tomorrow to at least start this work of properly putting my 650 back together. I've been very busy with home repair... My sewage stack pipe is leaking. I've got some time before the contractor comes in to help me put things back together right. So I plan to be back in the saddle by the weekend!
Well yes, you really need to be able to run the bike for setting the timing using a timing light. You can initially static time it to get it close but then it should be checked while running with a timing light to set the timing exactly.