Long Boy Fuel Screw Kit  $79.95
pn: 3020m1

 with 4 new extended screws, springs, washers and o-rings.

"Long Boy"
Finger and screwdriver adjustable extended Fuel Screw

Frustrated with trying to find an "almost 90 degree"  screwdriver to fine adjust your fuel screws for best idle and cruise?
Use Factory Pro's new "finger adjustable" fuel screws to adjust fuel screws for best throttle response. Traveling to high altitude? It's easy to lean out the lowend temporarily.

Make your life easier!

Installation:
Remove old short stock fuel screws, old o-rings, old washers and old spring. The o-ring might be stuck in the carb, so, take a light and make sure it's really out if it didn't come out with the screw (or you can't find it after you took out the screw)
Use a small bent wire to pull it out if it doesn't drop out. Keep the old parts for "spares".

Each screw assembly comes with:
4 Long Boy fuel screws 
 4 new o-rings
4 new washers
4 new springs

pn: VEL-Y01S64-1515

TENTATIVE!!

The 3EN uses the 1WG airbox, so the stack adapter rubbers will fit the airbox, but we need the carb bellmouth OD to verify that the rubbers will fit the carbs.

$249.95

A sample picture of Dave Norgard's race winning 1WG 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

 Emulsion Tubes, nickel plated, Factory Pro

Factory Pro nickel plated emulsion tubes - longer life than original - better fuel atomization than worn originals. Cures lowend richness caused by needle jet wear.

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.

Pretty much every fzr400 and 600 aficionado has one. 

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!  2012!!!

:-)  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 $120.
 

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