TOPIC:

Thanks for the compliments.

The eccentric is upside down, this gives me about 3/4 inch more ground clearance which is already a little close. I can turn it rightside up if needed.

The brake stay needs to be able to float, as the chain and incedentally, the eccentric gets adjusted. I actually thought a long time about fastening it to the spool mount.

After talking with a few road racers friends (341) we thought is would put less "bind" into the swingarm, if we stuck with the stock ZRX location. It also looks closer to regular production.

When the bike rides by you, I am hoping people just think fo it as a production bike. When it's sitting in a parking lot on bike night, there should be plenty of conversation.

All good input. I could change the stay mount in the future, now aafter 6 years, i am trying to get things done.

tk11b40 wrote:

now after 6 years, i am trying to get things done.

Can't blame you there, I keep looking for a good second to ride while working on my first.

Where did your lower shock mount go?
It looks like u cut it off?

The lower shock was surgically removed, we then fabricated another, it will be welded back on the swingarm, in the correct position.

So much surgery....

Thats the money you could be saving on GIECO....

bumpppppaaa..bummpppappaaa..

This shock mount just sits around the shop starring at me!!

I just measured my free sag and static sag . It seems that the zrx shocks springs are tooo stiff. this may be due to the fact that i laid the shock down to set the ride height lower. i could put the lower mount back into the original mount but this would lower my front rake. the steering seems fast now. I was sure my rake was about 24* but now it measures 26??? maybe it changed since I played with the front preload? it sure feels fast.
I think i may as well try raising the rear, just to see. this will allow me to see if the proper sag is achievable as well.
Maybe u could make a lower mount with 3 mounting locations so u can play with ride hieght. that was my reasoning for having the lowering link. or just tack yours on and check the sag and rake? how long are your shocks? mine are 14 1/4"

Shocks are 13 3/4" eye to eye.

The ZRX is about a 500 pound bike (i dunno what that is in Kilos.....ahh you metric Canadians!!) the KZ all lightened up should be about 425-450 dry.

The rake should have gotten better with the lowering of the rear end. If you are good enough to check the rake, maybe look at trail. From what I understand, that will also help to stabilize the bikes steering. You just dont want too much. Trouble with that tiem is it generally means a new tree and top clamp.

www.rbracing-rsr.com/rakeandtrail.html



I am looking at the link you have there, noticing the shock could do a little free play dance. I am wondering if this brief moment of freeplay has anything to do with the wobble.

www.rbracing-rsr.com/advchoppercalc.html

Check this out, ignore the harley crap, if you put your dimensions in here, you get what you are looking for.

I just cant remember the optimum trail figure. i think its a formula of sorts, i come up with around 5 inches of trail. but I input number from memory, so that could be off a bit.

Just reviewing the sales specs for new bikes, you can get an ida of what is optimum.

Rake (fork angle):24.5°
Trail:94 mm (3.7 inches)

So I just started seaching the e-mail machine/www. machine and it tells me the specs on an R-6 Yamaha sportbike. The r-6 or any 600 is gonna have the most extreme front end set-up. As trail is reduced so is stablity (typically).

Based on what you have ridden in the past and how it felt to your style of riding you can find what you want.

My Ducati Monster has 24 degree rake, and 4.7 inches of trail. It feels pretty stable, until you hit some rumble iee stuf, then it does a short headshake dance.

I got used to it, and softend up the front end which helped alot. On a typical track day I put about 100 miles on the odometer. I might feel this happen once or twice.

Your blank posts are freakin' me out man. Yes I lurk. Troy341

The zx9 weighs 475LBS dry, rake = 24, trail= 93mm
kz = 528lbs., rake = 26, trail= 90 mm.
ZRX12 = 492lbs.

i jacked the rear end up into the stock shock mounts.3" higher.each inch at the rear = about 1* of rake. this increased the rake from 26 to 22.5. That is STEEP!, of course this will reduce the trail as well

I took it around the block. the steering felt fast before, now its a lot faster.
I didn’t work it hard yet. I need to find a good road.
I did have a hose clamp on the shock laydown bracket. I know what u mean about it possibly shifting a bit. I was concerned myself. from the small ride I don’t think the issue has gone away. it may be worse. Too early to tell. it defiantly took some confidence away from me when I measured 22.5* rake.the best ting i could do would be to find shoter shocks so i can remain at 26* or 27* of rake.
I know a lot of guys put shorter forks on front and the zrx setup at the rear and don’t complain. but now I wonder how hard they actually push there bikes? this runs fine if u don’t push it, but what fun would that be.
I think I will run a chalk line down the driveway and test for front wheel to rear wheel alignment. as u suggested, this may be an issue.Its hard to find a spot = on both sides to measure the rear wheel alignment.
I will have to measure the trail and see where i am, but with the shocks laid down it should have been close to 90.
I looked at the calcultor but i dont know the offset #?

Offset, i am assuming you mean fork offset, which is the distance from the steering stem forward to the fork tubes.

Just lay a straight edge across the center of the top of the fork tubes, then measure back to the center of the steering stem nut.

I really wanted to make the upside down forks work with mine, but I had a couple people (341) (stoppee) convince me the ground clearance issue was not worth it.

I am glad i stuck with the conventional forks, there were enough other things to take care of.

.....Troy...it freaks me out when my posts are blank too...

I had to go to the Microsoft website and correct a little problem

how long are your forks?
When i put the shocks into the original lower mounts(more upright), i regained the sag. the springs are not bad in the upright position(sag = 20mm), and too stiff when laid down(sag= 13mm). but i need shorter shocks or longer forks to regain the rake. the ground clearance is not bad.

mark and tk11b40,do you guys think that we could take the zrx shocks and remove the eyelet from the chrome rod end and shorten and re-thread and just buy a race tech or eibach or whoevers spring and get where you want to be?
just thinkin .
leon holmes

no not on these anyways. the eyes are part of the dampers.

look real close at em mark,they had to get the springs on somehow.

leon holmes

i just looked at some on ebay and the eye on the bottom appears to be aluminum,so they have to be attached to the chrome rod somehow(prolly threaded)maybe has a rollpin to lock them.they had to be able to assemble them so we should be able to dis-assemble them,i would think.

leon holmes

341 wrote:

Your blank posts are freakin' me out man. Yes I lurk. Troy341

Oh Crap the "Great one" is watching!!!

Hey Troy I'll be in the wonderful Northwest in a few weeks...

I want to see that tricked out 160!!!!!

Call me. August 8, 9 I'll be in Seattle for the races. Troy341

mark1122 wrote:

how long are your forks?
When i put the shocks into the original lower mounts(more upright), i regained the sag. the springs are not bad in the upright position(sag = 20mm), and too stiff when laid down(sag= 13mm). but i need shorter shocks or longer forks to regain the rake. the ground clearance is not bad.

The Stock KZ forks are 30.5 Inches long, totally at rest on the bench, from top of tube to centerline of axle.

Now here is the freaky part, I think I have been posting 30-31 Inches on the GSXR Forks, which apparently is not correct. They are mounted on the bike, hardly any wieght on them, maybe 1/8 to 1/4 Inch compressed.

They measure 29 3/8 Inch from top of tube to centerline of axle. Sorry if I have confused anyone. The GSXR forks are no doubt somewhat stiffer on the spings, so the two should be near identical on ground clearance. I had originally used GSXR 750 forks which are an Inch or so shorter, the ground clearance did not look good, so 341 (Troy) explained the 750 clip ons are on the underside of the top plate,and the 1100 puts them on the top side of the top plate. Therby making the 1100 forks about an inch longer.