Honda NSR250R Particular – BikeBound

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70 hp, 254 lbs: Two-Stroke Race Duplicate Restomod from Japan…

Constructed from 1987-1999, the Honda NSR250R was a street-legal two-stroke race reproduction powered by a liquid-cooled 249cc 90° V-twin with Honda’s power-valve system and nikasil-sulfur lined cylinder bores — therefore the NS in NSR. Whereas we weren’t fortunate sufficient to obtain these bikes within the States because of emissions laws, most of them are actually sufficiently old to be imported, titled, and registered within the US!

Launched in 1990, the MC21 was the third-gen model of the NSR250R, that includes a brand new body and iconic “gull-arm” swingarm, together with some high-tech digital wizardry:

“The bike makes use of a PGMIII ECU that’s coupled to a throttle-position sensor and gear-position sensor. With these inputs plus rpm, the ECU screens and controls the ability valves and ignition timing to present optimum efficiency. Very trick stuff for 1990!” –Bike.com

In pretty latest comparability of three 250cc two-stroke race replicas from this period, the MC21 NSR250R swept the sphere, scoring excessive marks each no the monitor and within the paddock:

“If I have been available in the market to purchase a brand-new bike or an old-school two-stroke street-legal 250, I might purchase the red-and-white Moto2 Imports NSR250. I’ve by no means smiled a lot on a motorbike earlier than; it seemed like a swarm of bees. It was an superior expertise.” –Cycle World

For 1992, a restricted quantity of 1500 Rothmans SP fashions have been launched, sporting the long-lasting cigarette firm livery:

“The 1992 Rothmans SP is likely one of the most coveted two-strokes of all time.” –Moto2 Imports

Enter our new buddy from Japan, Susumu Sato (@nsr_mc28_mc21), who owned a Honda NSR250R 25 years in the past…solely to have it stolen and by no means recovered. Quick ahead two and a half many years, and Susumu determined to get again within the saddle. Although the NSR Rothmans specials are extremely uncommon and costly even in Japan, Susumu managed to select up a non-running donor and spent the following three years restoring and customizing it into the beautiful machine you see right here.

Susumu says his inspirations have been as different as fashionable MotoGP bikes, the thirtieth anniverary version Honda CBR1000RR-R Fireblade SP, and the F-15 fighter jet. Via a flurry of modifications detailed beneath, horsepower has been elevated from the inventory output of 45 hp to 70 ps (69 hp), whereas weight is down almost 40 kilos — from 132 kg (291 lbs) to 115 kg (254 lbs)!

As you may think about, there have been many challenges to finishing the construct, together with monetary sacrifices (Susumu is grateful to his spouse for understanding), however the result’s effectively value it — a modernized NSR250R SP that performs in addition to it appears:

“There may be an acceleration that doesn’t look like a 250cc, and it’s nearly an phantasm that you simply’re difficult the 600cc tremendous sports activities. When braking into corners, it has wonderful stopping energy, and in corners, it handles simply as you need it to.”

Under, we discuss to Susumu for the total particulars on the construct!

Honda NSR250R Restomod: Builder Interview

• Inform us just a little bit about your self, your bike historical past, and your workshop.

My identify is Susumu Sato. I purchased a damaged bike and continued to revive and customise it at dwelling for 3 years.

• What’s the make, mannequin and 12 months of the donor bike?

1992 Honda NSR250R SP Rothmans.

• Why was this bike made?

Twenty-five years in the past, I had the identical bike (NSR250) as now, however it was stolen. As an grownup, remembering the way in which it rode 25 years in the past, I actually wished to trip once more.

• What impressed the design idea and development?

Designed with inspiration from MotoGP fashion, Honda CBR1000RR-R, and F-15 fighter motifs.

• What customized work has been carried out on the bike?

● Suspension
Entrance: PC40 SHOWA HRC inverted radial fork
Rear: Öhlins, TTX processing set up, Professional arm processing, NX5 5.5J Marchesini wheels, Bridgestone S21 180

● Controls
BABYFACE (Sato Racing) handlebars, Domino quick-turn throttle, Accossato racing clutch lever, JHA rear-sets

● Electrical system
MC28 harness (processed with out deal with lock unit), MC28 PGM4 Consumption system, MC28 carb, T2R rectifier, Tyga carbon ram air fashion cab field, DMR solenoid jet, JHA cab setting package

● Exhaust system
JHA RS Drive 304 chamber

● Engine
Reed valve case main compression processing, cylinder processing, T2R rebuild core crankshaft, MC21 late crankcase and deburring, oil pumpless and T2R blind plate, mission cowl portray, DMR light-weight pushed gear aluminum housing, MC21 light-weight flywheel processing, Tyga woodruff key 1 diploma, engine drive system titanium bolts

● Brakes
Entrance: Brembo RCS19 radial grasp cylinder & CNC racing caliper, Sunstar works increase disc, Accossato CNC riser bar tank, AC line mesh hose
Rear: Brembo grasp, Sunstar racing disc, tankless grasp, AC line mesh hose

● Drive system
ISA 15T sprocket, Affirm 38T sprocket, MC21 mission
DMR light-weight clutch housing and clutch strain plate, varied bearing substitute
Thermostatless Cooling system, DMR racing impeller and mechanical seal, T2R radiator hose

● Exterior
T2R kind 2 full cowl and display screen and yellow movie processing, Tyga Rothmans FRP tank
Burning Blood NSF100 FRP Sheet and T2R Sheet Sponge
T2R rear carbon fender and carbon headlight cowl, general-purpose Aprilia RS4 carbon winglet processing, SC59 early entrance fender

● Paint
Reducing and self-painting

● Different
MC21 body processing & sharpening, MIXS seat rail & battery field processing, Accossato CNC tank cap, varied titanium bolts

• Do you could have a nickname to your bike?

“MC218V.”

• Any ideas on horsepower, weight and/or efficiency numbers?

Horsepower 70ps / Weight 115kg

• Are you able to inform me what it’s prefer to trip this bike?

There may be an acceleration that doesn’t look like a 250cc, and it’s nearly an phantasm that you simply’re difficult the 600cc tremendous sports activities. When braking into corners, it has wonderful stopping energy, and in corners, it handles simply as you need it to.

• Was there something you have been significantly pleased with throughout this construct?

Though it’s made in Japan, the worth and value of the NSR250 is excessive even in Japan, so not everybody can do it. I really feel fortunate and proud to have bought it.