1992 Fireblade

Honda CBR900RR, 92-95

1992 - CBR900 RR N
1993 - CBR900 RR P
1994 - CBR900 RR R
1995 - CBR900 RR

Famous Factory Shift kit

SHFT-EVO-H21/cbr900rr-KT      $239.95

inc: star, arm and spring and 11393-MV9-670 clutch cover gasket.

Add $20 for Hybrid Ceramic microbearing

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2012 #1 Formula USA
University of Kansas - Lawrence

Factory Pro Shift Star
equipped for quickest and most consistent shifting.


EVO Shift STAR kit

The Star, Arm, Spring ad gasket kit.

The pro rider's "Night and Day" Advantage 

You want easier and quicker upshifts, decreased shift lever travel, fewer missed shifts and wickedly quick downshifts?

We all do -

This is the kit that makes the difference.
Track and street.

Install directions page


Note about quickshifters
You must set your quickshifter kill time 5mm to 10ms quicker or the shifting will be clucky on the track.


Kit includes the new Factory Pro designed Shift Kit:
 a new Factory Pro detent arm with a low friction microbearing roller, a new Factory Pro shift spring and the NEW Factory Pro EVO Detent Star.Make shifting MUCH quicker. MUCH easier, MUCH lighter and virtually eliminate missed shifts.

Marc  800 869-0497

Replace worn non-replaceable stock needle jets 

$280  + shipping and handling

to replace worn stock needle jets with new nickel plated Factory Pro needle jets.

415 883-5620

cbr900rr Needle jets worn out?

High mileage on bike?    Poor fuel mileage?

 Bike runs too rich at low rpm because of worn needle jets?
Send in your carbs and we can replace your worn stock needle jets with nickel plated Factory Pro needle jets.

415 491 5920

Let  Factory Pro replace your worn "non-replaceable" needle jets.

Better throttle response - potentially better mileage  - augmented part throttle response.


Nov 2021
Hey Marc, just wanted to let you know. Carbs are running great on the CBR900RR.
Carb Recalibration kits

The one and only..
Factory Pro
"APK Kit"

THE Most Power

CRB-H21-2.1-APK    $199.95
2 Special Air Filters
Special Airbox gasket
Matched Factory Pro Carb kit

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This was and still is the largest selling, highest performing CBR900RR kit in the world

Adds up to 3-4 True Rear Wheel HP at high rpm over a properly jetted bike. (over a standard C-10 carb recal kit)

A must with ported heads or aftermarket cams. Allows more air at 7.5k+ rpm.
Replace the restrictive stock/aftermarket air filter AND KEEP the stock airbox exterior.
Perfect for Germany and other areas that do not allow airbox removal.
Produce Best Power - THROUGH all rpm's as compared with standard carb tuning.
Unmatched Top-end Power.
Makes more HP and COSTS LESS than other non pressurized airbox kit combinations.
Compare to BMC or K&N replacement filter and carb kit? Costs less and makes more power!
Add the RTR-HON-8-04 for very improved part throttle power, with the APK Kit. Wheelies better!

Requires internal airbox modification. Click here.

Use  RTR-HON-8-04   $89.95 ignition advancer

For 1992-1999 CBR900RR only.
When used with restricted camshafts, as in CA, France, Switzerland and others - use 2-3 sizes smaller main jets.

Ask D and D, Hindle, Kerker, M4, Mick Hone Motorcycles, Two Brothers Racing, Vance and Hines and Yoshimura for a recommendation about Factory Pro Products!  references

h21grph.gif (33533 bytes)
A stock, restricted camshaft model to unrestricted cams, +4 Ignition Advance, AirBox PLUS KIT and competition exhaust

HP figures are
  True Rear Wheel HP Scale

CRB-H21-1.0   $139.95

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Easy to install and tune - no slide drilling! Well known in the States as the smoothest performing kit available.
Adds more low-end / midrange, if the proper main jet is selected, more top-end power.
This is one of the kits that we made our reputation on.

Use  RTR-HON-8-04  ignition advancer for increased  low and mid power!

CRB-H21-1.1-TI    $159.95

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The premium "Ti ProKit". Easy to install and tune - no slide drilling!
Same great performance as the standard 1.0 kit above, but includes the best material available for needles - Titanium.
Stainless steel allen screws for the float bowls complete the "Ti ProKit" upgrade.
Adds more low-end / midrange, if the proper main jet is selected, more top-end power.
This is one of the kits that we made our reputation on.

Standard drop-in carb kit

Use  RTR-HON-8-04  ignition advancer for increased  low and mid power!


RTR-HON-8-04 $99.95

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This rotor advances the timing +4 degrees. Increases part throttle power - what you'd call snap!
Decreases rotating engine mass - Lightest weight advance available.

For the 900's, it's the "suggested" advancer.

That being said,  the "04" advance is a MUST DO with drop-in Erion cams in a stock engine, adding 1-2 True HP throughout the powerband. That's power measured under load - just like the Real World.


If you are installing an AIrBox Plus kit, you'll get a nice chunk of additional midrange power with the airbox kit (+3 to +4 HP) - and if you use the +4 advancer, you'll get a nicer (stronger) boost at part throttle than the +2 will give - but - you'll only get +2 or +3 on top."

The best combination -  is the AirBox Plus Kit and the +4 advancer


I bought the RTR-HON-8-04 for my Honda CBR 900RR. This is simply the best thing and easiest thing I have ever done to my bike! Everybody I ride with wants to know what I did to make my 9RR so much more snappy in the mid range. And I gladly tell them about your timing advance kits. And next on my list is your evo shift kit! I was wondering if I could get some stickers to put on my track day plastics. If needed I can send a SASE to you. My address is Sylvia Kansas. Thank you very much!

Justin Strausberg

Hybrid Ceramic Wheel  Bearings


Hybrid Ceramic intro special

reg $299.95

4 bearing kit
front and rear wheel bearing set
pn: BE-HYCER-H21-92-97
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Hybrid Ceramic Wheel  Bearings

4 bearing set

2 front wheel bearings
2 rear wheel bearings
(does not include sprocket carrier bearing)

Tough steel races and almost  friction free ceramic balls.

Bearings have rubber seals that are easy to remove if desired.



Cover Info

Cover set for the 900 to 95. Absolutely the strongest covers you can buy - and has the highest strength / weight ratio available! Individual replacement cover parts available direct from Factory.

Andrew Pranck, Netherlands   -   CBR900RR  -   MotoPro

Subject: Thanks!!! Airbox Plus Kit
Date: Tue, 24 Jul 2001 19:30:57 +0100
From: davereddy@eircom.net
Organization: Eircom Net (http://www.eircom.net/)
To: "factory" <info@factorypro.com>

Dear Factory Pro!!!,

Well what can I say, Thank you Thank you Thank you.
I recently fitted one of your kits to my Fireblade (CBR 900RRS 1995 model) it was like getting a new bike! I have had the bike for about 2 years now and I was starting to get bored with it, then on with the kit and what do you know its fun again. I fitted the +4° timing advancer, did the air box conversion and went with the 140 jets and the needle’s on the 3rd notch (down from top). It worked flawlessly, even with the standard pipe. I fitted a full race can (Art Full race) and the bike really purrs like a cat (a big one!) now.

Full details: ~

Honda CBR 900 RRS (1995 Irish market model)
Stock cam
Stock pipe
Art Full race can (Muffler?)
Filter ~Factory Pro 2*Unifilter (as in Kit)
Pilot~ Stock
Needle clips~ 3rd notch
Main Jet ~ #140.
Ave Temp.~ 10-15°C
Humidity ~40 to 60%
Altitude ~Sea Level.

Location~ Dublin, Ireland

Did all the work myself, it is no problem (I am an engineer by trade!).

I am now in the process of building a race bike, I hope to race the Irish Clubman’s Super Sport 400cc next season. The bike that I have is an NC-30 (VFR 400 R3N 1994 model) Honda, and I would like to know if you make jet kits, timing advancers and air box conversion kits for this bike, if you do can you give me the details and let me know how I can get one.

Yours gratefully,

Dave Reddy

Ireland (Full Postal Address: ~ 18 Seapark, Malahide, Co. Dublin, Ireland)

Subject: CBR 900 list
Date: Tue, 22 Dec 1998 09:01:05 -0500
From: "Firth, Ian" <ian.firth@cdott.com>
To: "'Marc'" <factory2@ix.netcom.com>

Just want to add to FJ's message. I got a CBR 9 this Spring with a full TBR and a Factory Jet kit. I have asked a few questions on the list and am more a lurker since I get the Digest and much of the mail is answered before I see it. However, I have always found your answers helpful and enjoy reading them. You helped me with my float setup and the list answers, including yours over the year, set my jetting up well according to my seat-of-the-pants dyno. So thank you for being so generous with your time and knowledge, all the best business wise in 1999 and have a merry Christmas.

Cheers, Ian
Subject: cbr900rr APK Airbox Plus Kit recommendation


I had my 96 RR done with Two Bros full system, Air Box Plus kit, and put in 49 state cams. Stock CA, my 900 had 98hp on a Dynojet Dyno. After, it made 117hp, and unbelievably increased midrange. You will not believe the improvement!

Good luck,

Mikey Rosenblum

Subject: cbr900rr RTR-ADJ-HON-8 Adjustable Ignition Rotor setting

I have the RTR-ADJ-HON-8 advancer set at 2 degrees of  retard. The guys at Marietta Motorsports here in Atlanta say that  seems to be the hot setup. What do you think?

Umm, -2 on a silly dj dyno, maybe that works under that dyno's light load condition.  I suggest that you set it where it feels strongest to you in your  operating condition. Then do it -2 and try it. See what works best under real world load. Use that setting.
BTW - the guys at Marietta are pretty cool, but they need a Factory Pro EC997 Low Inertia 4 Gas Eddy Current dyno so they can help people even more!


Final setting of +4 on the advancer. The minor loss at high RPM is offset by the Huge power anywhere else. Besides, I rarely run it to redline on the street.

Now that I've had some time to play, I've noticed that the bike inhales my friends' bikes at will. (except for that damned R1). And with the filters,  the motor sounds like it wants to suck the gas tank through the carbs in the process!!

Thanks again for your help!

Subject:  My Shift Kit Experience
Date:  Tue, 9 Jan 2001 19:44:34 -0800
From:  "John Falb" <falb@aznet.net>
To: <factory2@ix.netcom.com>

Marc and Raul,

I just wanted to write you guys to say THANK YOU.
I ordered a shift kit for my '95 900RR and installed it with no problems. I thought.
When I started it up the engine made a horrible knocking sound. I sxxt a brick right then, I knew I fxxxxxd it up. The sound came from the head and the clutch. So after disassembly and reinstallation with no change I called Factory and talked to Raul.
He was very helpful and walked me through the steps to see where I want wrong. After two phone calls and return call back I realized that my screwdriver had been where is shouldn't have. When I first tried to take off the nut for the outer clutch basket I stuck my screwdriver into the crank/clutch gears to keep the clutch from spinning. BAD IDEA! I had bent the outside edge of a couple of teeth. I filled the offenders down and now she is better than new.

The shift kit works awesome. The feel is totally different and each shift seems solid. I know when it goes into gear.

Anyway, everyone has always been very helpful at Factory Pro.

Thank you.
John Falb

Email Subject:
Urban Myth:  a K&N Air Filter installed into a Honda CBR900 will lose power

my 2cents. no k&n
I read on? Erion's website, they tested the various, not the factory kit, aftermarket filters: They found that the factory filter flowed better or as good as all of them. This is true for my '95 I'm sure.
Other years no idea. I don't own one, so didn't pay attention to that detail.



CBR900 myth #1 (started by some "Honda race team"..... for some reason):
Hypothesis: K&N Air Filter doesn't make more power than a stock air filter.

The cbr900 K&N works just fine in the 900.

It takes 2 main jets larger than a stock air filter, 1 clip richer and a bit more fuel screw mixture. That's the total extent of it.
I think that it would be really hard to find somebody who had jetted their bike and had not made more power with the K&N or BMC filter.

The K&N (or BMC Race) filters flow somewhat more than stock, IF PROPERLY JETTED, make 1-2 more True HP than the stock air filter could.
The only thing that I can think is that they didn't properly jet the 900 after they installed the filter.
Say it's not true!!!  :-)

If the K&N did not decrease intake restriction, you wouldn't have to use larger jets just to get the fuel right again.
Maybe we used a better dyno than a dynojet dyno to figure that out - or maybe we just rode the bike after putting in a K&N and said: "Damn! That's lean, Cartman! Let's put bigger main jets in it and raise the needle!" like one of the 2 guys who had one of two identical 900's did.
Low and behold! The 900 with the K&N and 2 sizes bigger mj's stomped on the previously equal 900.....

Reality is SUCH a harsh concept!     :=)

If best jetted stock air filter HP = X, then....
best jetted K&N/BMC HP = X+1 or X+2 HP, then
best jetted APK HP = X+3 or X+4 HP.

Marc, the pilot curmudgeon






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Contact Factory Pro
M-F, 9am - 6pm, Pacific time, -7 or -8 GMT

800 869-0497
 USA and Canada

415 883-5620

fax 415 492-8803

parts information

EC997 dynamometer information

Product Support /Tech SECTION
click here


Mailing / Shipping address:
Factory Pro
179 Paul Drive
San Rafael, CA 94903

And most importantly
Restart back at the HOME page and click on the red box in the top left to find the bike that you want parts for...
restart at HOME page


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The extension of the laboratory for engines of the Swiss Federal Institute of Technology was completed in about 1935. Its architect was Rudolf Otto Salvisberg (1882-1940). He had a successful career in Berlin but returned to Switzerland after the advent of the Nazis. His architectural style was somewhat similar to that of Erich Mendelsohn. The staircase of the laboratory is in normal use but well preserved.
Edited to the tunes of Chemical Residue by Herbie Hancock.

Maybe in next rewrite, he'll fix the ignition timing and dyno chapters...
Otherwise great book with great starting ideas.

My bible

The little blue bible for quick references and little known facts.