How to make my FZ400 faster on the track??

[animalviking]

Hi all, I'm new to the forum and had a major question which I know a few of you might know the answer to. So this season I've been racing a RZ350 stroker, SV650, and had the FZR400 as a back up/rain bike but last weekend the RZ went on the fritz. So I raced the FZR400, handled great but just needed to get 5 more ponies out of it to reach the top guy. My mods on it so far are: R6 front end/ R6 rear shock, 17" front and rear wheels, Jet kit (drilled slides), K&N filter, 4l plastic tank. d&d header pipes with Q4 exhuast (no exup). Any help would be greatly appreciated.

[DonTZ125]

What's your gearing like? The 400 likes to scream, so don't be shy about running it a bit short and bouncing off the limiter on the straights.

What shape is your chain in? (Since you're racing I hope it's pretty good! )

Advance your static timing about 5deg - here's how.

Further down that same thread; you'll find a suggestion to degree your cams and retard the intake by 10deg.

Have you confirmed your jetting on a dyno, or at least with lap times and plug chops? This isn't a TZ or RS, but one or two jet sizes either side of "right" will cost you power. Are you tuning to atmospheric conditions? Do you have a weather station? (Racing an RZ, I hope so!)

Welcome to the forum - put up some pics, already!

[Evilchicken0]

Clean the head up, grind the vavles in and then set the valve tolerances.
Make sure your carbs are well ballanced

[~JM~]

Hose your brakes down with WD-40... Guarantee that will make you faster.


~JM~

PS. This is a joke. Do not actually do this.

[DonTZ125]

Might make you faster through one or two corners, but it won't do much for your overall laptimes ...

[animalviking]

Thanks for all the helps guys!! WD40??? LOL this I will have too try as a last resort! I will dyno the bike after the ignition timing mod, and adding a tooth on the rear currently (16/45) and post the results. I don't think I'll have time to adjust the cams and flow the intakes/exhaust in time for the next race. As for a weather station I never run one I should but try to stay on the rich side of things after a plug chop most of the time. Man I really do love this bike though by far my best feeling vintage bike I have going. Thank again for all the replies.

[tgold]

What have you done with the suspension?

[animalviking]

R6 front end and a 07 r6 rear shock (custom made dog legs for correct ride height)

[animalviking]

Oh one more question???? Will any 400 stator work on my 89/90 FZR400? I was thinking of buying one and cutting it down just for the timing only and want to run a loss less bike. I think this would definitely make her rev happy!

[DonTZ125]

Just unplug your VRR. The stator is stationary by definition, so there's no rotating mass savings to be had by 'cutting down' the stator.

[animalviking]

You just made my night Don! So I can just remove the windings attached to the crank?

[DonTZ125]

? There are no windings on the crank. The rotor has magnets, but no wires.

[Evilchicken0]

Aren't the alternator windings bolted to the inside of the casing on the 1WG ?
The 3TJ has them on the crank.

[animalviking]

So I finally got around to adjusting the timing, but my setup is quite different than other FZR400 models please see my pic posted in the gallery section gallery2.php?g2_itemId=28952&g2_imageViewsIndex=2. On this stator there is one T mark and a two F marks that are approx 4mm apart from each other. When I'm checking the timing I advanced my timing light to 4-5 degrees and it shines on the right side of the F mark band. Is this correct? Your help is much appreciated.