ZXR400 SP set up

There seems to be more and more members appearing that are racing the ZXR400 so i've created a special section just for you to show off results, discuss meets etc etc.

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robracer
Posts: 13
Joined: Sat Jun 07, 2008 11:40 pm
My Bike: ZXR 400SP L1
Location: Sydney Australia

ZXR400 SP set up

Post by robracer »

Got the bike to the track today & have found a few interesting things, history first... the bike was bought already set up as a race bike but after a small off in November 07 by the previous owner the bike has sat idle since then. I have spent about 20 hours to get it to a rideable state but by no means ready for racing. So today was a shakedown to see what I need & what the bike is doing & not doing.
Now for the big question the fork legs are 5mm through the top yoke obviously to make it tip in a bit easier but I found she was hard to throw into corners ... the steering seemed real slow, Is this common?
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1980-Z1100 road racing sidecar swinger 1980-Z500 race bike
2005-Z750 roadie somewhat modified 1991 - ZXR400SP race bike
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Ballsout Racing
L-plate hell
L-plate hell
Posts: 386
Joined: Sun Nov 07, 2004 11:04 am
My Bike: tomos moped
Location: Most race circuits ;-)

Re: ZXR400 SP set up

Post by Ballsout Racing »

No, shouldn't be slow. I take it everything is straight and the head bearings are OK? Is there a steering damper fitted? (too stiff?)

Are you using all the fork travel? are they set up for your weight? etc

You can go upto 16mm showing through yokes (but really should have a steering damper for that), but be carefull that the wheel doesn't touch the oil/rad under braking using all fork travel. You can bend/modify the lower rad bracket to move the rads back as far as possible.
zimm
zxr400 oc member
zxr400 oc member
Posts: 2320
Joined: Tue Oct 10, 2006 12:32 am
My Bike: ZXR400-M4, ZX4, ZX6R.
Location: Herefordshire

Re: ZXR400 SP set up

Post by zimm »

what he said ..

+ what tyres/pressures you running ?
User avatar
robracer
Posts: 13
Joined: Sat Jun 07, 2008 11:40 pm
My Bike: ZXR 400SP L1
Location: Sydney Australia

Re: ZXR400 SP set up

Post by robracer »

Thanks for the replys guy's, to answer your questions: Steering head bearings are ok & no notching or binding when the bars are turned, there is no steering damper fitted, Tyres are bridgestone slicks 160 65 rear & 120 60 front I think they were brand new at the start of the day & fork travel was about 80% but the forks feel really soft? I have been thinking about it & it could just be me .... coming off an 05 ZX10R that was beautifull on the track, to this bike that is 18 years old, I might just have to get used to it after a shock rebuild & some new fork internals & fresh fork oil.
Image
1980-Z1100 road racing sidecar swinger 1980-Z500 race bike
2005-Z750 roadie somewhat modified 1991 - ZXR400SP race bike
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