Road Test: www.motorcycle.com, ex250 test

Kawasaki EX250, GPX250r

Great in-town bike and a fun entry level racebike for areas of the world that have a 250 Production race class.

Little known fact - Factory Pro has built quite a few race winning EX250 racebikes. Porting, milling, boring, Full Radius Valve Jobs were available for the 250. We specialize in custom tuning the EX's - whether we built the bike or not.

To extract the maximum power for the engine, it is necessary to use the Low Inertia EC997 Tuning Dynamometer with 4 Gas EGA to concurrently dial in the carbs and the cam timing. You can't really do optimum work on an inertia dyno, socalled "tuning to an af as is usually found at dealerships levels -

 

EX250 during oil additive testing on EC997 Eddy Current Dynamometer by Factory Pro

part number desc.
When you desire to use the stock airbox with stock or K&N air filter.

 $89.95

Standard drop-in kit, using the stock airbox and stock, K&N or UNI stock replacement air filter.  The kit has enough jets to use with an aftermarket "street" or "race" exhaust - and also, the stock exhaust.

No slide drilling like the dj kit, is required.


inc: main jets, Celmat30 needles, clips, shims, float bowl allen screws, etc.

 

EX250e 86-87   C10 kit  K14

International buyers will be billed additional $18 for shipping

EX250 88-07f/h C10 kit K13

International buyers will be billed additional $18 for shipping

When you desire to use
individual air filters
and remove the airbox.

 $89.95

Use the Config 30 kit for when you desire to remove the stock airbox and use individual filters.

It's not much more power, but it sure looks neater!

The kit has enough jets to use with an aftermarket "street" or "race" exhaust - and also, the stock exhaust.

EX250e  86-87   C30 kit K14

International buyers will be billed additional $18 for shipping

EX250f/h  88-07 C30 kit K13

International buyers will be billed additional $18 for shipping



TL-float height gauge
$49.95 USD

International buyers will be billed additional $18 for shipping

The easiest way to set float height - important when tuning for max mileage and low rpm tuning precision.

click here for "how to"

 

Ignition Advance Kits / rotor


RTR-KAW-5-05     $64.95

NOT for 250!!
International buyers will be billed additional $18 for shipping

Ignition Advance Kit - NOT for 250!

We do NOT NOT NOT NOT (not!) make an ignition advance kit for the ex250!
NOT! No! Non! Nadda! Nyet!

BUT!!!!
The ex250 uses a large, 3 bolt flywheel puller that only a dealer would have.
The woodruff key from the RTR-KAW-5-05 is the same key that fits the 250.....

If you buy the RTR-KAW-5-05 kit, you can use the supplied woodruff key and the installation instructions for the ex500...... and you'll have a nice ex500 flywheel puller tool, too!
NO! You can't buy the key without the puller, I know you can't use the puller - but - as I said, I don't make a 250 kit......


FEEDBACK

creighton smith wrote:
 

Marc,
I really enjoyed swapping flying tales last week but what I really enjoyed was taking my bike for a ride on Saturday after installing your jet kit.
I started off with some trepidation since the 250 Ninja board is chock full of horrifying stories of repeated rejettings, needle raisings and lowerings and all manner of, after all that, very partial successes.  None of these concerns Factory Pro kits, however, and for good reason as I discovered.
I installed everything per the instructions:  3rd groove, install jets, 2 turns out (went out another half turn), and the bike ran well from the get-go.  I now have a midrange, thank you, and find myself cruising around at 7k (even as low as 4-5k if I'm trying to be really quiet) which is something the stock setup would not allow-at any rate it would not pull smoothly below 8k previously.  Full power is as good or better (My ass dyno is out of calibration, due to a boating accident I missed last year completely.)
I am delighted.  My brother in law is also convinced and may have ordered a kit already.  I'll post a recommendation on the Ninja site, but they're such bucks-down squids they'd rather waste the whole riding season than spend the bucks and the hour to get a fine running bike.
Thanks again.
Creighton Smith 

LINKS

NINJA250.com

 

 

New and improved Suzuki Teka SFI  2

with new TPS display and "MMT" Memory Module Tuner

Finally - Quick, easy, cost effective Suzuki tuning with no expensive "add-on boxes"
Suzuki cruisers and sportbikes

Please click here for more info

Contact Factory Pro
M-F, 9am - 5pm, Pacific time, -7 or -8 GMT

800 869-0497
 USA and Canada

415 491-5920

fax 415 492-8803

parts information
 info@factorypro.com

EC997 dynamometer information
info@factorypro.com

Product Support /Tech SECTION
click here

 

Mailing / Shipping address:

Factory Pro
179 Paul Drive
San Rafael, CA 94903
USA

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

 

This Tuning Site has been visited by
  
people.
www.gigits.com - the oldest counting service on the web

          

 

 

 

LINKS
EFI and Carb Tuning - Most all FI and carb tuning

by Wheelsmith Racing
The Harringtons own American Flyers, one of the most established flight training facilities in the USA.

 8 locations

 800-362-0808

Flight Training - train with AMA race winner Todd Harrington.
Insurance ONLINE QUOTE
Clearinghouse

Get ONLINE realtime quotes from multiple companies - One Stop MC, auto, home and more from insurance companies you know and trust.

The Rich Oliver Mystery School will help you discover your hidden inner strength. 
It will challenge you. It will teach you a new way of thinking, and a new way of riding. You can take your riding to an exciting new level!  

We use a variety of proven drills and training techniques. 
Practicing these techniques with our Yamaha dirt track trainers will enhance your abilities both on the track or the street.  

It doesn't matter what you ride or race, the Rich Oliver Mystery School improves everyone's skill level and mindset!
Make your next tour Unforgettable,  Affordable and Exotic.
Superbike Tours Thailand - See you there.

Geoff@superbiketoursthailand.com
Supwebike Tours Thailand

Factory Pro Fall Flying Special!

Book a sightseeing flight over the Wine Country or a Kamikaze aerobatic flight or a biplane flight over Infineon Raceway, the Golden Gate Bridge and the San Francisco Bay for one or two during the spring and get a free souvenir t shirt!
(NEW!  Ask about the P-40 flights!)

707 938 2444

Just say that you saw this on the Factory Pro website!
Marc

Northern California's most unforgettable flying experience.  No experience required.  Open weekends!

Artisan Crafted Fine Cheeses – Since 1865       

Specializing in Handmade Brie & Camembert

Marin French Cheese Co., also known as The Cheese Factory and Rouge et Noir is not just the oldest cheese manufacturer in the country, but a vacationers and day trippers destination as well as a unique part of American History. Located north of San Francisco, east of Napa County, west of Pt. Reyes and Olema and south of Sonoma County, Marin French has produced hand crafted Artisan soft ripened cheese since 1865. Rouge et Noir cheeses are similar to French and European varieties but reflect the characteristics of Northern California, producing it's own regional style.
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.