VEL-Y01S64-1515
(does not include Dave's carbs)

$249.95

A sample picture of Dave Norgard's race winning fzr400 carb set with his" formally secret" Factory Pro Superflare stacks.

Boost power and response with the improved resonant qualities of hard aluminum stacks vs. resonance absorbing soft rubber stock stacks.
The Factory Pro Superflares feature an improved taper inner diameter profile for air straightening and an optimized inlet radius that promotes enhanced pressure wave pressure wave propagation and recovery rates.
 

SPECIAL NOTES for professional tuners concerning modified engine fzr400's:
Since a high percentage of fzr400's are racebikes or trackday bikes, with different pistons, porting and cams, the desired stack length may be different from what the stock engined 400 wants.
For modified bikes, please send a dyno chart, preferably under full load, and I'll try to custom fit stack lengths for you.
Also, please send the length of the stacks you are using, measured from the inside airbox base to the top of the stacks.
And maybe a digital picture of the stock stacks, in the airbox, too.
Factory Pro's patented "quickchange" stacks are potentially available in lengths as short as about 10mm to 80mm, in 5 and 10mm steps
Thanks - Marc

Factory Pro's own
LONG LASTING nickel plated stock replacement emulsion tubes (needle jets)!
Yamaha pn: 1WG-14141-90-00
 

Discontinued by Yamaha  - Factory Pro designed and produced new tubes that will allow you to fix that overrich lowend fzr400 -

The rebuilder's secret........

Standard drop-in carb kit

Adds more low-end / midrange, if the proper main jet is selected, more top-end power. Easy to install and tune - no slide drilling!
Note: Do not use standard, drop-in K&N air filter. This is the only K&N application that does not work to improve power - even if jetting is matched to filter.

Config 30 carb kit

Requires removal of stock airbox and running 4 K&N or equivalent individual air filters. Can't use the above velocity stacks with K&N or BMC. It would be possible (though I haven't done it) to use a universal Unifilter.

Low-end response is as good as, if not better than stock carb tuning.

Ignition Advance Kit

This Factory Pro kit advances the timing 5 degrees. With stock engines with stock compression ratios, there is more power everywhere. Part throttle power is better - helping corner exit speeds. Improved in-town drivability.

Trans Detent Arm Kit

Make shifting MUCH quicker and virtually eliminate missed shifts. This is exactly the same kit that Yamaha Racing has used. Huge shift action improvement.

The kit requires the removal of a 27mm clutch nut - so, you'll need a:
Deep 27mm socket and an Air or electric impact wrench
If you insist on not having an impact wrench, you'll need / appreciate.......
A friend to hold the rear brake on while you loosen the 27mm nut while the bike is in 3rd (ish) gear.....

Every time I say - "I'm going to discontinue that kit." You guys, start calling and buying them again! OK- OK!! One more year!  2010!!!
OK, OK, OK!!! 2005, too!!

:-)  Marc
User's comments

COV-Y01-RH-KT

Billet Engine Cover

RH Cover for the fzr400/600, NOT complete with steel "Skidz" cover insert. Absolutely the strongest cover you can buy - and has the highest strength / weight ratio available! Individual replacement cover available direct from Factory.

$179.95

Special!
I'm out of the little Steel inserts and won't be making more -
I'll sell the cover, with stainless steel screws and gasket - but without the steel insert for
only $100.
 

Removed 3.5 lb. alternator rotor (NO charging system) and replaces it with a total loss 8oz. trigger rotor, similar to Yamaha Race Kit unit. Not for street use.

The only way to accurately measure float heights. Works on nearly every carburetor.