Subject says it all.

I have a 1982 GPz750. I want to put a stronger swingarm that will accomodate a wider wheel and tire on the rear. I do not want a swingarm that is over length (ie GS1100, ZRX1100). It seems that this is an issue with monoshock swingarms in general.

Is it true that a swingarm from a turbo GPz750 should drop into the frame and is the same length? I will add lower shock mounts to this set-up.

How wide a 17" wheel/tire can you fit into that swingarm?

Be carefull bidding on that front wheel. It looks to be the smaller axle that was used for the leading axle front forks. The 79 KZ 750 did not come from the factory with mags, this leads me to believe the seller is going off the date of manufacture on the frame for his description. If the bike was manufactured in say Sept of 79 that would make it a 1980 and that wheel will not fit your forks. The back one is for a drum brake set up and is a 16" wheel which was also not used in 79 which further makes me believe these wheels came off a 1980 KZ750 LTD.

Oops let me correct this post after looking in the gallery at some 80 KZ750 LTDS it appears as though the front wheel will work. They still used the standard type of fork in 1980. I guess I was thinking of the CSR 750 which used the leading axle forks. The rear is still a no go unless you want to do a bunch of work changing over the swingarm and brakes.

Post edited by: The Gringo, at: 2006/10/06 10:30

1977-1980 KZ650 front wheel will fit, the rear wheel will not (different size rear axle).
KZ1000 through 1979 will work front and rear, I'm not sure about the 80 model.

You can use the 80 KZ750G twin swingarm and brake pedal/linkage (drum brake rear), and then you can use the G model mag wheels.

No KZ750 four wheels are a direct bolt on, neither is anything after 1980 that I can think of.

Or you can keep watching eBay until another set of Morris Mags for the 76-79 750 twin show up :evil:
(Hopefully mine will be here today)

Post edited by: steell, at: 2006/10/06 09:08

My 79 B had spokes, it has the mags off an 84 KZ700 now, but they wern't a direct fit, direct fit would come from the late 70s 650s 900s and 1000s, most of the 70s larger frame bikes share the same axle diameter and disc size, in fact lots of things kawasaki did interchange...forks, sprokets,swingarms,gages,tanks,shocks, brakes and calipers,elecrical stuff....ahhhh ! kawasaki the chevrolet of jap cycles

The purpose of the crankcase breather is to provide ventilation. There is no filtering under the round cover. If you remove it, there will be a round metal plate with a couple short hoses but the purpose is to allow air from the crankcase to excape so that pressure doesn't build in the crankcase. The only time anything actually will come out the opening (with air) is oil and that oil is the result of the piston rings allowing excessive oil past them... this is caused blow-by and can be caused by cylinder ovaling, bad rings or chunks missing out of the pistons. There is little reason to put a filter over this vent. The only real problem would be an insect crawling down the hole. Most bikes will blow a small amount of oil mist out of the hole especially when the oil is real hot or slightly over-filled so putting a hose on the vent is a good idea and routing the hose back over the swingarm keeps any residue off the engine. If you have SOME blow-by and operate the bike, the hose is a necessity as you will have a mess in the area otherwise.

Exitpupil wrote:

Thanks for the advise and links. I can weld so it looks very doable for me. It's the swingarm that is giving me a headache on researching. So many to choose from, and none in front of me on a bench to look at. I want one not overly complicated to swap and about the factory arm length.

get the GS1100 arm;)
heres a link for ya too

Post edited by: 77KZ650, at: 2006/10/01 12:26

Some good pix in this post:
GSXR Mono

And one here: DS2's .

Some more info on mono shocks

I've heard others say you want the shock as vertical as possable. I guess it also depends on the swing arm design. Over here in North America, we don't get to see too many (actually none at all) GSXR400s. Got a picture of the arm?

The frame isn't really the issue but the swingarm. The swingarm on a shaft bike doesn't have a shaft going through but two smaller shafts where the swingarm pivots. These ride on needle bearings. The shaft swingarm has an intergal tube for the shaft and I can't see how it could be done easily. You could pull out the shaft transmission and get rid of the bevel gear case but since there is oil in there, you would have to figure out how to put a cover that holds oil with an oil seal for the output shaft where a countershaft sprocket could be mounted. The shaft's transmission is different and the clutch is bigger than most of the KZ models. Not sure about the MK II but that motor may also have the bigger clutch and might be a cantidate... I would think if you wanted a chain bike, it would be easier to start with a chain bike platform.

Today my (slightly un-bleedable)front master cylinder failed on the way to my mates house! Thankfully he has a gsxr400 streetfighter he's breaking so I nabbed the cylinder off him!!

He's told me I can have the whole front brake assembly for £30 (around $58) and Due to them being nissin 4 pot calipers I'm sorely tempted. Question is how much work will it be? If I can get brackets made up for the fork legs is that it?

Also, after trawling previous posts I'm sorely tempted to buy the whole arse-end off the gixxer and go monoshock rear disk. I am looking to do an engine swap in the near future (probably to a gpz750 motor,)
so the more ridged my set up the better. Am I biteing off more than I can chew here? I can weld, so That doesn't bother me. Does anybody have any decent pic's of how they've mounted their monoshock to their frame?

Jon.

Post edited by: Crowson_punk, at: 2006/09/24 11:42