650 to 750 cam jug shaft boobies conversion

So over on kzInfo I have been seeing a lot of talk about the easy conversion to make your 650 a 750 or w.e. I would ask over there but 1) seems to be taking a while to validate my email so I cant login 2) I'm sure its mostly the same people here and there.

I know most of the people on these bikes have 70's models, I am riding a '82 so would that conversion work? and what year 750 would match up.

Also, is there anyone out there with a How-To on this conversion, maybe with pics? I am a beginner with this stuff, especially engine work. So I just wanted to see if this would be possible for me and my bike, and at what cost (parts, machining...ect) so I could start saving and maybe dive into that this winter. Thanks.

Essentially it's just a barrel swop as the 750 is just a bigger bore.
Make sure the barrel is off an engine with the same camchain system. i.e. early ones are roller camchain, later have hyvo(silent)type.
You may or may not have to open up the crankcase mouths to accept the larger dia liners which really means an engine strip but i have done this myself with a rotary cutter and lots of rag in the mouths and the sump off but you have to be absolutley sure no swarf is left in the motor.
Nothing else HAS to be changed apart from a slight up jet, All the 650 parts will work with the 750 bore but if its more performance you're after then a set of GPZ cams is the next step. Or it could be cheaper to just drop a complete 750 motor in there.

750 four was introduced as a 1980 model, and all 750 fours have the HyVo cam chain setup (at least when new they did).

While not really relevant to this discussion, 80-83 KZ750 E and H models have cylinder blocks and heads with provision for the roller cam chain setup.

Zx750A (83-85 GPz750) are different than the regular 750 four motors.

If your KZ650 does not have a kickstarter as stock, then the 750 cylinder block. head, cams, and pistons, will fit straight on.

Then there is the Wiseco 810 kit

So all I would need to do this is: cylinder block, cams, and pistons from any 750/4 '80-83 model; and no machine work is required?

Yes. That's more or less it. Straight swop.
Early 650 cases may need the mouths opening out (which shouldn't apply to you) but pretty sure the later ones all came off the same production line as the 750 so no mucking about .

Cool. thanks for the info. Start pricing everything up and see about doing this when winter comes.

as far as tuning with this setup. obvious jetting needs to be done right. and I heard kz1000 carbs fit on the 650. do I need to get these to go along with the upgrade?

edit:
Also, while looking up the pistons fleabay, some came with the Rods and some didn't. Do I need to get some with rods included or does it matter at all.

You just need a barrel and its matching pistons from a runner in good condition. Don't need rods, should just need new circlips for the pistons.
Don't buy pistons and rings seperate (they won't have the correct clearance) unless they are oversize to the bores and you intend to rebore.

yeah. im not trying to do anything that involves machinery and/or tons of money

I've got the jugs, cams, head, pistons, crank, etc (ok, a whole spare 82 gpz750 motor). Give me a price, I'm trying to get money to put my other gpz750 back together and into my 650.

Ha I wish I could give you a price, but I'm broke! That's why I was just wanting some info on it for maybe this winter. I will probably only do this if I can get lucky and find a good deal cos I'm a broke ass guy working at a skateshop

Soooo I guess this whole time I've had the wrong year on my bike. Looked stamp on the neck tube, it said 12/ 80 so I guess that means December 1980 which would make my bike the 81' 650h. Please correct if Wong. But will the info above still apply to this year bike?

Check a parts diagram and see if your cam chain is the same as the 78 or the 82. If you need a crank I have that too