Cbr400rr (Nc29) Model Info

February 5, 2018 | Author: cpong67 | Category: Carburetor, Motor Oil, Clutch, Motorcycle, Throttle
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CBR400RR (NC29) Model Info


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CBR400RRL-R (NC29) Model Info [Sorry, this page is still under construction...Hell, it's always going to be under construction!] History The NC29 was built and/or sold as new by Honda dealers in Japan from 1990 to sometime in 1999 (possibly later). "NC29" is not the official name for the bike Honda designated the "CBR400RR", but this is how they are commonly known. As far as we are aware, Honda built only domestic ("J-spec") models of the CBR400RR. NC29s were so popular in Japan that they eventually overflowed and found their way (as "grey imports") into the UK and, in much smaller numbers, into other markets—including the United States. The NC29 stayed basically the same throughout its model run, except for color and suspension changes. The RRR models received updated suspension components including pre-load and rebound adjustable cartridge-type forks and an upgraded rear shock. Below are illustrations of the NC29 color schemes available throughout its production:

Although not factory options, many NC29s have been painted to resemble various factory-sponsored Grand Prix and Superbike race bikes. Some of these paint schemes are shown below:

Repsol white '99

Smokin' Joe's '98

Models NC-29 model letters can be found on a small white sticker located under the passenger seat (and also on the bar code sticker originally located behind the license plate). Because NC29s were not imported through "official" channels, their registration documents are notoriously unreliable as a means of determining their years of manufacture. This is because registration documents on 'grey' imports are often intended to reflect the year a bike was first sold, which is not necessarily the year the bike was

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CBR400RR (NC29) Model Info


manufactured. Many NC29s appear to have been sold by dealers as new in Japan years after being manufactured, so the years that ended up on the registration documents may not correspond to the bike's actual year of manufacture. Consequently, the most accurate way of referring to NC29s (and other 'grey' imports) is by model letter. Model letters used by Honda appear to correspond with the VIN model letters used in the United States since the early 1980s. (Here is a bit more about VINs.) As a result, bikes manufactured in 1990 carry the model letter "L", 1992 bikes are "N" models, etc. (with the letters "I", "O", "Q", "U" and "Z" being skipped). Some Honda models, however, have additional sub-designations (possibly relating only to color scheme) using roman numerals, and the NC29 is one of these. All CBR400RR NC29s were manufactured for the Japanese domestic market, though, as with other 400cc Honda motorcycles of the era, many were later exported to other markets (especially the U.K.) as "grey imports". The L and N models share most of their specifications and parts, with only minor differences being the norm; but the R model was significantly revised with respect to its suspension and electrical systems. [A Web page detailing all of these differences can be found here...just as soon as it is written!] The following table details the colors and the beginning serial and engine numbers for the NC29 production run:


Beg. Engine #

Code Colors

Beg. Frame #

Carb ID #


Fighting red/Pearl crystal white

Granite blue/Light silver

Passion Granite NC23ENC29-1000001 VP01A-A red/Heavy blue/Heavy 1300001 gray gray



Pearl crystal white/Dionysus Pure black blue

NC23ENC29-1050001 VP01A-B 1420001



Ross white/Jockey blue


Sparkle pearl black/Procyon red

NC23ENC29-1100001 VP01B-A 1500001

Specifications1 Item Dimensions:


Overall length


Overall width


Overall height




Ground clearance

125mm (4.9 in.)

Dry weight


Curb weight Maximum weight capacity Frame:

Frame type

Twin-spar, box-section aluminum

Front suspension

41mm Showa damper-rod forks with adjustable pre-load2

Front wheel travel Rear suspension

2 of 6

Alloy "Gull-arm" swing arm with three-way linkage

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CBR400RR (NC29) Model Info


Rear wheel travel Rear damper

Gas-filled damper with adjustable pre-load and rebound damping

Front wheel size

[17x3.5 in.]

Rear wheel size

[17x4.5 in.]

Front tire size

120/60-R17 55H

Rear tire size

150/60-R17 66H

Front brakes

Double floating disc; 2-piston Nissin sliding calipers

Rear brake

Single solid disc; single-piston Nissin sliding caliper

Caster angle Trail Fuel tank capacity

15.0 liters (4.0 U.S. gal., 3.5 Imp gal.)

Fuel tank reserve capacity Engine:


Four-stroke, in-line four cylinder

Bore and stroke

55.0 mm x 42.0 mm


399 cm³ (24.3 cu in.)

Compression ratio

11.3 : 1

Valve train

Gear driven DOHC; 4 valves per cylinder

Intake valve opens @ 1mm lift Intake valve closes @ 1mm lift Exhaust valve opens @ 1mm lift Exhaust valve closes @ 1mm lift Lubrication system

Forced pressure and wet sump

Oil pump type


Cooling system

Liquid cooled; radiator with cooling fan

Air filtration

Paper filter

Crankshaft type Firing order


Cylinder arrangement

4 cylinders; in-line

Cylinder numbering

1-2-3-4 (left to right of bike)

Carburetor type

Constant velocity Keihin; 4 carburetors

Throttle bore Drive train:

3 of 6

Clutch system

Multi-plate, wet

Clutch operation

Cable operated



Primary reduction

2.117 : 1 (72/34)

Final reduction (sprockets)

2.600 : 1 (39/15)

Drive chain slack

15-25mm (5/8-1 in.)

Drive chain size/links


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CBR400RR (NC29) Model Info



Fuel system:

Clutch system:

Cooling system:

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Gear ratio, 1st

3.307 : 1 (43/13)

Gear ratio, 2nd

2.352 : 1 (40/17)

Gear ratio, 3rd

1.875 (30/16)

Gear ratio, 4th

1.591 (35/22)3

Gear ratio, 5th

1.435 (33/23)

Gear ratio, 6th

1.318 (29/22)

Gearshift pattern

Left foot operated return system: 1—N—2—3—4—5—6

Ignition system

Digitalized full transistor ignition

Starting system

Electric starter motor

Charging system

Triple phase output alternator

Regulator/rectifier type

SCR Shorted/triple phase full wave rectification

Lighting system

Battery [(YTX7A-BS)]

Engine oil capacity at draining

3.2 liters4

Engine oil capacity at disassembly

3.8 liters

Engine oil capacity at oil filter change

3.4 liters5

Recommended engine oil viscosity

SAE 10W-40

Oil pressure at oil pressure switch

490 kPa (5.0 kg/cm², 71 psi) @ 7,000 rpm (80 deg.C, 176 deg.F)

Main jets

# 1086

Slow (idle) jets

# 35

Pilot screw setting

2 1/4 turns out

Float level


Carburetor vacuum difference

Within 30 mmHg

Base carburetor (for carburetor synchronization)


Idle speed

1,300 +/- 100 rpm

Throttle grip free play

2-6mm (0.08-0.24 in.)

Clutch lever free play

10-20mm (0.4-0.8 in.)

Clutch disc thickness

2.92-3.08mm (0.115-0.121 in.)

Clutch disc service limit


Clutch plate (steel) warpage limit

0.30mm (0.012 in.)

Coolant capacity (radiator & engine) 2.0 liters Coolant capacity (reserve tank)

0.3 liters

Radiator cap relief pressure

0.93-1.22 bar (13.5-17.7 psi)

Thermostat begins to open

80-84 deg.C (176-183 deg.F)

Thermostat fully open

95 deg.C (203 deg.F)

Thermostat valve lift

8.0mm (0.23 in.) min.

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CBR400RR (NC29) Model Info


Front suspension:

Rear suspension:


Cold tire pressure (driver only, front)

33 psi (2.25 bar)

Cold tire pressure (driver only, rear)

33 psi (2.25 bar)

Cold tire pressure (driver & pass., front)

33 psi (2.25 bar)

Cold tire pressure (driver & pass., rear)

36 psi (2.50 bar)

Fork spring free length


Fork spring direction

Tighter coils on bottom

Fork oil weight


Fork oil level


Fork oil capacity


Steering bearing pre-load

22 Nm [1.0-1.5kg (2.2-3.3 lbs.)]

Shock spring free length


Shock spring installed length


Battery/Charging system:

Ignition system:

Nitrogen gas pressure

[98 kPa (142 psi)]

Brake fluid type


Front brake disc thickness

4mm (0.16 in.)

Front brake master cylinder I.D.

12.700mm (0.500 in.) (1/2")

Front brake caliper cylinder I.D.

25.4mm (1.0 in.)

Rear brake disc thickness


Rear brake master cylinder I.D.

14.000mm (0.5512 in.) (9/16")

Rear brake caliper cylinder I.D.


Reg/rec regulated voltage/amperage

14.0-16.0v (0.5A) @ 3,000rpm

Battery capacity

12v (6AH) [YTX7A-BS]

Battery charging rate (normal)

0.7A/5-10 hr.

Battery charging rate (quick)

3.0A/1 hr.

Battery voltage


Spark plug (standard)

NGK CR8EH-9 or ND U24FER-9

Spark plug (racing)

NGK CR9EH-9 or ND U27FER-9

Spark plug gap


Ignition timing "F" mark

18-deg. BTDC @ 1,300rpm

Advance starts Advance stops

Lights/Meters /Switches:

5 of 6

Full advance

32-deg. BTDC [+/-2-deg. @ 12,000rpm]

Main fuse



15A x 1; 10A x 3

Headlight (high/low beam)

12v 60/35w (H4)

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CBR400RR (NC29) Model Info

Starting system:


Tail/brake light

12v 18/5w

Position light

12v 1.7w

Turn signal light

12v 15w11

Instrument lights

12v 1.7w [x 5]

Oil pressure warning indicator

12v [1.7w]

Oil temperature indicator

12v [1.7w]

High beam indicator

12v [1.7w]

Turn signal indicator

12v [1.7w]

Neutral indicator

12v [1.7w]

Starter motor brush length

12-13mm (0.47-0.51 in.)

Notes: 1. To be updated upon receipt (and, er, translation) of the Japanese-language NC29 workshop manual. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.

R models have cartridge-type forks with adjustable pre-load and rebound damping R model: 1.578 : 1 (30/19) R model: 3.0 liters R model: 3.2 liters R model: # 105 R model: 295.5mm R model: 120mm R model: 408cc R model: 173.5mm R model: 12v 18/5w (front); 12v 15w (rear) Copyright © VSource.org 1999-2007 [Sources: Haynes CBR400RR Service and Repair Manual; Honda Parts Manuals and Microfiche]

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