Well.....
I thought I would add the new GPZ600 Kawasaki carbs...
Went on easily(without airbox on mind you), the only problem I encountered was the cable length.
The throttle cable had to be shortened(used a old but usable one)..I cut 2 inches off(now i wish I had marked my cables, don't know off a '79/'80 650 or a '81/'82
cb650
)
For the (?)ferrule on the end I took some 1/4 inch stainless steel tubing, turned the OD to .225, drilled a 0.078(2mm) hole 0.200 from one end of the tube, then cut the end with the hole into a piece 0.400 long.
I threaded the cable through the small hole, and hammered a section of allen key into it (lined up the cable hole with one of the flats on the allen wrench),cut to length with a hacksaw, and ground it to the length of the
ferrule I had made.
I also brazed the whole thing together.(for safety)
Looks kinda odd, but it works.
I should have cut another 1/4 off the cable though.... i'm at the limit of adjustment for the cable almost.
Anyways....WHOAAAAA!!!!!!!!!!!!!!1
Went for a "ride around the block"... or thats what I told the wife.
Just got back from a short ride in provo canyon, and a bit of highway/in town riding as well.
I tried MAX acceleration on this short loop, onto and off of I-15, by my house.
With the 650 carbs it hit 55-60 consistently.
With the 750 carbs it would easily get to 70mph.(75 almost 80 if i timed it right for shifting)
Now with the GPZ carbs, i hit a bit over 80, not quite 85.
In comparison to the stockers, i'd take these ANY DAY.
The cb750 carbs I was using, The oldschool look has it's merit. (love that choke linkage!)
The GPZ carbs look like any other CV carb set(of the 80's) pretty much.
Throttle response is better on the GPZ carbs than the 750's.
GPZ jet needles have 6 grooves for the circlip. They can even be changed ON the bike!!
Main jet is 108, didn't check the idle jet size.
The GPZ's main and idle jets are screw in type.
I simply gave the passages a good cleaning, cleaned the jets main and idle... everything inside was good except the float needles.
I robbed another set of carbs laying around for new(er) one.
Hoping to not have to re-jet. They 60mm bore motor and my bike is 61mm bore.
I'm guessing for my altitude i'm probably OK.
Wonder if they will get worse or better MPG than the 750 carbs.
l8r, gotta ride.