So here's all the ZXR 250 info I have rounded up over the last couple of years hope it helps, feel free to add or edit.
The ZXR 250 is a 249*cc (15.2*cu)*Liquid cooled, four stroke, transverse four cylinder, DOHC, 4 valves per cylinder (16) made by Kawasaki. It was introduced in 1988, with a minor update for the 1990 model year, and a considerable redesign for 1991, after which the ZXR250 received only colour scheme changes until 1993 when a 39hp (29.08kw) and 180km/h (111mp/h) limit was introduced due to changes in Chinese law (excluding Malaysian models). Like the Honda CBR250, Yamaha FZR250 and Suzuki GSX-R250, the ZXR250 is noted for advanced, almost excessive, engineering and design.
Ninja ZXR-250 models
ZX-250 A1,A2,B1,B2: Produced from 1988 to 1991.
ZX-250 C1,C2,D1: Produced from 1991 to 2004 1991-1999 in Japan 1999-2004 in Malaysia (these models were only produced in a silver and black colour scheme). This bike was unofficially re branded as the ZX-2R or ZXRR in Australia by importers.
An SP (sports production) model known as the ZXR-250R was also available from 1990-1993 Known as the B1,B2 and D models. These models have CVKD 32*mm (1.3*in) keihin carburettors, different 1st, 2nd and 3rd gear ratios, a larger exhaust, different CDI (higher power curve, no speed limiter, 19,000rpm rev limiter and no hp limiter) rear suspension . The B2 models also had a single seat cowl.
All four of the major Japanese motorcycle manufacturers produced a sporty, high-revving, 4-cylinder, 4-stroke 250cc motorcycle capable of producing up to 45 hp (34 kW). They are the Honda CBR250, Kawasaki ZXR250, Suzuki GSX-R250 and the Yamaha FZR250. With limited exceptions, these bikes were generally only officially available in Japan. However they (particularly the CBR250 and ZXR250) were available in the rest of the world as grey market imports
What’s a grey import?
Grey import vehicles are new or used motor vehicles and motorcycles legally imported from another country through channels other than the maker's official distribution system. The synonymous term parallel import is sometimes substituted.
Car makers and local distributors sometimes regard grey imports as a threat to their network of franchised dealerships, but independent distributors don't mind since more cars of an odd brand bring in money from service and spare parts. Also, car makers frequently arbitrage markets, setting the price according to local market conditions so the same vehicle will have different real prices in different territories. In order for the arbitrage to work, there must be some means to reduce, eliminate, or reverse whatever savings could be achieved by purchasing the car in the lower priced territory. Examples of such barriers include regulations preventing import or requiring costly vehicle modifications. Grey import vehicles circumvent this profit maximization strategy. In some countries, such as Vietnam and Australia, the import of grey-market vehicles has largely been banned.
Engine4-stroke In-line four cylinder, DOHC, Liquid cooled, 16-Valve Redline range From 18.000 to 20.000 rpm Displacement249 cc Starting Electric Bore x stroke49.0 * 33.1*mm Compression ratio12.2:1 Carburetion(4) Keihin CVK D30 IgnitionTCBI Spark plugNGK CR9E or ND U27ESR-N Transmission6-speed, Constant mesh, Return shift ClutchWet, Multi-disc, Manual, Cable-actuated Frame Perimeter, pressed aluminium Rake/trail24 degrees or rake and 85*mm of trail Suspension, front Inverted telescopic Suspension, rear Uni-track, Swing arm Wheelbase35.5 in (1.360*mm) Wheel travel, front4.7 in (120*mm) Wheel travel, rear4.4 in (113*mm) Tire, front110/70R17 54H Tire, rear140/60R18 64H Brakes, front Dual disk, Double calliper Brakes, rear Single disk, Single calliper Overall length78.7 in (2000*mm) Overall width27.0 in (685*mm) Overall height42.9 in (1090*mm) Ground clearance5.1 in (141*mm) Seat height28.9 in (735*mm) Weight dry311 lb (141*kg) Minimum turning radius9.5 ft(2.9 m) Fuel capacity 3.4 US gal (15 L) Reserve fuel capacity0.78 US gal (3 L) Fuel type Min 91 Research / 87 avg. octane unleaded Oil capacity2.6 L Oil type SE or SF class, SAE 10W40
0-60 mph (0-100*km/h)5.23s Maximum speed180-240km/h Max power45 hp (33.6 kW) @ 16000 rpm Max Torque18.07 ft·lbf (24.5 Nm) @ 11500 rpm Fuel efficiency7l / 100*km @ 100*km/h wet weight: 171kg
How many models are there?
1989- ZXR 250 A1 and B1
1990-ZXR 250 A2 and B2
1991-ZXR 250 C1 and D1
1992-ZXR 250 C2
1993-ZXR 250 C3
1994-ZXR 250 C4
1995-ZXR 250 C5
1999-ZXR 250 C7
A1,A2,B1,B2 BROCHURE LINK
C1,C2,D1 BROCHURE LINK
ZXR 250 M BROCHURE LINK
B2 MODEL LINK
ZXR250R D1 MODEL
ZX2R UNOFFICIAL LINK
ZXR M 250
ZX2R M OFFICIAL
How many specs are there?
J, J SP,C,M,ZX2RM
How much horse power do they have?
39hp (29kw) to 45hp (33kw) at 16,000rpm depending on the model and spec.
ZXR 250 C1 40 HP LIMITED
What is there top speed?
Anywhere from 180km/h to 240km/h depending on specs restrictions and mods.
TOP SPEED RUN
How fast can they do 0-100?
Anywhere from 5 sec to 6 secs depending on specs model and mods.
What mods can I do?
ZXR 250 PERFORMANCE/HANDLEING MODS
Fuel: Try 95 or 98 octane fule
Speedo: Increase to a 240km/h speedo
Spark Plugs: Try iridium plugs
Jets: Try increasing to 130 or 135 jets
Air Filter: Get a free flow air filter
Gearing: Gear up or down to a 13 or 15 tooth sprocket
CDI: Get an un-restricted CDI
Exhaust: Get a race pipe e.g. yoshi, roo racing, formula one
Carbie’s: increase to 32 mill carbie’s
Screen: Get a race or double bubble screen
Rear Tyre: Increase tho a 150 tyre
What are the air pipes for?
Simply to help cool the rectifier under the fuel tank.
What does KRAS mean?
Kawasaki Ram Air System
What does R and RR mean?
R means race engine as in the sp (sports production) models
RR means race replica
ZXR 250 RR
Where can I get parts?
EBay obviously and the best place I found was otobai.
(03) 9328 8344 firstname.lastname@example.org
Which one is the best/quickest?
How do I know what year model myn is?
Enter you’re frame number in this link
I’m only guessing but I would say the 91 D1 model (sp) only because it would have the least restrictions and best power to weight ratio.
ZXR 250 SITE
ZXR 250 FORUM