1977 KZ 1000 "Brat Style" Project

531blackbanshee wrote: how much over stock is that fz1 swingarm?
i really like the way it fits and looks,good call on that.

keep us posted,

leon

So I measured the swingarm difference and it looks to be 4" over stock, give or take a little. I'm glad I hunted this one out, but like I said it's going to need a little bit of shiming on either side to take up the side to side shift.

Anybody have any info on gearing, going from the 130/90-18 tire to a 190/50-17? I would like to keep my revs and speed as close to stock as possible.

bratbiker wrote: Anybody have any info on gearing, going from the 130/90-18 tire to a 190/50-17? I would like to keep my revs and speed as close to stock as possible.

Overall tire diameter may vary among brands and models within brands.

What brand and model 130/90-18 is being replaced, and with what brand and model of 190/50-17?

Knowing the model tire of each brand will enable determining the respective overall tire diameters.

Knowing measurements of the respective overall tire diameters should enable more accurate calculations of drive ratios.

Good Fortune!

I went 520 18 front 35 rear if i remember right plenty of get up and go and hwy isnt screamin its head off

bratbiker wrote:

531blackbanshee wrote: how much over stock is that fz1 swingarm?
i really like the way it fits and looks,good call on that.

keep us posted,

leon

So I measured the swingarm difference and it looks to be 4" over stock, give or take a little. I'm glad I hunted this one out, but like I said it's going to need a little bit of shiming on either side to take up the side to side shift.

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i really like that swingarm myself.
i am thinking of buying one and under bracing it for a kz swap myself.
thanks for the info sir.

try this for your gearing calcs.
www.gearingcommander.com/

leon

Here is another Brat, some nice details on this one.

some more.









leon

leon

Well it's looking like this style of mod is a more popular than I thought. Thanks for all the pictures. Keep em' coming anytime anybody see's something. You can never have too much inspiration, or ideas to build on.

Well things have slowed down quite a bit with progress on the Brat, but I did manage to get the front end done. So, I pressed out the original stem and had a machine shop turn up a new one for me 15mm. longer.

I picked up a set of AllBalls berings that go from the CBR stem to the KZ head tube. Squished her all together, added grease and it turned out perfect.

So front end is done, now to work on the rear. I still want the look of the dual shocks on the back so I guess I'll have to figure out a mount to weld onto the new swing arm?

Been awhile since I've been on and progress has been coming along slowly on the "Brat". I ended up taking the swing arm into a machinist to weld on some shock tabs I picked up on line and while it was there he fabricated up a fairly nice looking brake stay.







So now I have the 2002 FZ-1 swing arm, the brake from the 2002 CBR954RR, and I found after endless amounts of tinkering that the954 rear wheel was not going to line up(currently for sale lol!) I picked up a set of wheels off a 2000-2002 R-6 for next to nothing and the wheel sits great now, and fits a 180/55-17.