BIMOTA KB4 RC

1
IO.PV.02 _Assembly and preparation manual KB4RC Rev1_19/04/2024

Foreword
In order to ship Bimota vehicles as efficiently
as possible, they are partially disassembled
before crating. Since some of the mostcommonly removed parts have a direct
bearing on a vehicle’s reliability and safety,
conscientious pre-sale assembly andpreparation be-comes extremely important.
Good setup procedures can prevent needlesswarranty claims and give customers a greater
sense of confidence in Bimota and their
Bimota Dealers. This Assembly andPreparation Manual explains step by step
procedures of the following items for all
Bimota KB4.
1. Uncrating
2. Assembly
3. Preparation
The selling dealer assumes sole responsibility for any unauthorized modifications prior tosale. Refer to your Service Binder for any Service Bulletins specifying Factory Directed
Modifications (Special Claims) which must be
performed before the vehicle is ready for sale.
Whenever you see the following symbols
heed their instructions! Always follow safe
operating and maintenance practices.

DANGERDANGER indicates a hazardous situation which, if not avoided, will result indeath or serious injury.

WARNINGWARNING indicates a hazardous situation which, if not avoided, could result
in death or serious injury.

NOTICENOTICE is used to address practices
not related to personal injury.

NOTE○ NOTE indicates information that may help or
guide you in the operation or service of thevehicle.

Bimota spa accepts no liability for any
inaccuracies or omissions in this publication,although every possible measure has beentaken to make it as complete and accurate as
possible. All procedures and specifications
subject to change without notice.

2

Table of Contents
Uncrating ................................................................................................................ 4
Opening Crate..........................................................................................................4
Parts Check ...............................................................................................................8
Assembly..................................................................................................................9
Mirror assy………………………………………………………………………………..……………………….10
Preparation ...........................................................................................................11
Battery Service..........................................................................................................11
Engine Oil(4-stroke) ................................................................................................13
Coolant .......................................................................................................................14
Clutch……………………………….………………………………………………………………………………...16
Drive Chain ...............................................................................................................17
Brakes .....................................................................................................................18
Suspension system .................................................................................................20
Wheels .....................................................................................................................25
Headlight .................................................................................................................26
Remove anticorrosive treatments .………………………………....................................273

Uncrating
Opening Crate
WARNING

Crates have sharp edges and may havenails or screws that can cause cuts andinjury. Always wear protective gloves,boots and eye protection whenuncrating to prevent injury.

Figure 1 Screwdriver

WARNING

The steel crate panel plates and fasteners have sharp edges. Always wear
protective gloves, boots and eye
protection when uncrating to prevent
injury.

Figure 2 Torx wrench adapter

4Opening crate5Remove fixing stripes and screws from rear stand, then turnthe steering wheel to the straight ahead position

Remove the bike from the front (example below with Bimota KB4)

6

Content of the box

Dichiarazione CE strumentazione radio(da stampare, piegare ed inserire nella busta)

Eccentric adjuster
Adjuster point

7

Parts Check•Open the parts box, and check the parts against the illustrations. There may be minor differences
between the illustrations and the actual vehicle parts. In the following chart remarks,

D =diameter in millimeters, and L=length in millimeters.

No.
1
2
3
4
5

mirror assy
motorcycle cover
warranty bookeccentric adjuster
tool kit

6

Ø3mm insert

Part
Name

Qty

Remarks

2
1
1
1
1
1

8

Assembly

9Mirror assy
Take an allen key 5mm and fix both mirror to the handlebars.
There are two oprions:
1) mirror outside2) Mirror inside (in this case it is needed to reverse left and right mirror andtheir expansion devices)10Preparation
Battery Service
The battery used in this motorcycle is a sealed
type and never needs to be refilled. Follow theprocedure for activating a new battery to ensure
the best possible battery performance.

Battery Removal•Take an allen key 3 to remove the screws. [A]•Remove seat closure [B]A

A. Screws (7pcs)
B. Seat closure

B• Disconnect the negative cable (-) from the negative terminal• Slide the red cap from the positive terminal• Take the battery out from the battery case

+

-

Make

GSYUASATypeYTZ10S

Features

9.1Ah
190CCAThe battery installed in this motorcycle is sealed type, so it is not necessary to check the battery
electrolyte level or add distilled water.

Battery Installation

Place the battery on the battery case. Connect the positive (+) cable to the Positive (+) terminal,
and black cable to the negative (-) terminal.

11Battery Maintenance
It is the owner's responsibility to keep the battery fully
charged. Failure to do so can lead to battery failure andleave you stranded.
If you are riding your vehicle infrequently, inspect thebattery voltage weekly using a voltmeter. If it drops
below 12.8 volts, the battery should be charged using
an appropriate charger (check with your Bimota
dealer). If you will not be using the motorcycle forlonger than two weeks, the battery should be charged
using an appropriate recharger. Do not use an
automotive type quick charger that may over-charge
the battery and damage it.

○

NOTE
Leaving the battery connected causes

the electrical components(clocketc.) to make the battery
discharged, resulting the overdischarge ofthe battery. In this case, the repair or
replacement of the battery is not includedin the warranty. If you do not drive forfour weeks or more, disconnect thebattery from the vehicle.

NOTICE
Installing the negative (–) cable tothe positive (+) terminal of thebattery or the positive (+) cable tothe negative (–) terminal of thebattery can seriously damage theelectrical system.

Battery Charging
Charge the battery following the instructions of your battery charger.
The charger will keep the battery fully charged until you are ready toreinstall the battery in the motorcycle (see Battery Installation).

Clean the battery using a solution of baking soda and water.
Be sure that the cable connections are clean. Put a light coat ofgrease on the terminals to prevent corrosion.
Cover the positive (+) terminal with the red cap ed install seat.

12

Engine Oil
Oil Level ceck

• If the engine is cold, start the engine
and run it for several minutes at idle
speed.

B• Stop the engine, then wait several
minutes until the oil settles.

C
D

NOTICE
Racing the engine before the oilreaches every part can cause engineseizure.

• Check the engine oil level throughthe oil level inspection window. With
the motorcycle held level, the oil level should come up between theupper and lower level lines next to

A. Oil Level Inspection Window
B. Oil Filler Cap
C. Upper Level Line
D. Lower Level LineA

• If the oil level is too high, remove theexcess oil through the oil filler opening using a syringe.

If the oil level is too low, add oil toreach the correct level. Use thesame type and brand of oil that is already in the engine.

the oil level inspection window.
Tightening TorqueEngine Oil Capacity

Oil Filter:
17N·m(1.7kgf·m,13ft·lb)
Engine Oil Drain Bolt:

3.2L(3.4USqt)[when filter is not removed]
3.8L(4.0USqt)[when filter is

29N·m(3.0kgf·m,21ft·lb)• Fill the engine up to the upper level
Line with a good quality engine oil
Specified in the table.

Recommended Engine Oil

Type:
APISG, SH, SJ, SLor SM with JASO
MA, MA1 or MA2
rating Viscosity:
SAE10W-40○

removed]

Although 10W-40 engine oil is there
commended oil for most conditions,the oil viscosity may need to bechangedtoaccommodate
atmospheric conditions in your riding
area.

NOTE
Do not add any chemical additive tothe oil. Oils fulfilling the above
requirements are fully formulated
and provide adequate lubrication forboth the engine and the clutch.

13

Coolant

Coolant Level Inspection• Position the motorcycle so that it isperpendicular to the ground.

• Check the coolant level through the

Coolant level gauge on the reservetank located to the behind of thefront fork. The coolant level should
be between the F (Full) and L (Low)level lines.

F
L

○

NOTE

Check the level when theengineis cold (room or atmospherictemperature).

• If the amount of coolant is insuffi-

cient, add coolant into the reservetank.

Coolant Filling

Remove the cap from the reservetank and add coolant through thefiller opening to the F(Full) level line.

NOTE○ In an emergency you can add water
alone to the coolant reserve tank, however it
must be returned to the correct mixture ratioby the addition of antifreeze concentrate assoon as possible.

NOTICEA

If coolant must be added often, or the
reserve tank completely runs dry, there is
probably leakage in the system. Have thecooling system inspected by your authorized
Bimota dealer.

A.

Reserve Tank Cap

14

Coolant Requirement

WARNING
Coolant containing corrosion inhibitors for aluminum engines andradiators include harmful chemicals
for human body. Drinking coolant
can result in serious injury or death.
Use coolant in accordance with the
instructions of the manufacturer.
Use a permanent type of antifreeze(soft water and ethylene glycol plus
corrosion and rust inhibitor chemicals
for aluminum engines and radiators) inthe cooling system. On the mixture ratio of coolant, choose the suitable one
referring to the relation between freezing point and strength directed on thecontainer.

NOTICE
If hard water is used in the system,
it causes scale accumulation in thewater passages, and considerably
reduces the efficiency of thecooling system.

NOTE○ A permanent type of antifreeze isinstalled in the cooling system whenshipped. It is mixed at 50% and has
the freezing point of–35°C(–31°F).

15

ClutchClutch Operation Inspection•

Check that the clutch lever operates
properly and that the inner cableslides smoothly. If there is any
irregularity, have the clutch cablechecked by an authorized Bimota
dealer.
Check the clutch lever free play.

Clutch Lever Free Play2~3mm(0.08~0.12in.)A

WARNING
Excess clutch lever free play could
prevent clutch disengagement andcause a crash resulting in serious
injury or death. When adjusting theclutch lever free play, be sure theupper end of the clutch outer cableis fully seated in its fitting so that it
doesn't slip into place later andcreate excessive free play.

B
C
A. Adjuster
B. Locknut
C. Clutch Lever Free Play• If the free play is incorrect, adjust the clutch lever free play as follows.

•

Clutch Lever Free Play Adjustment

Loosen the locknut, and turn the adjuster so that the clutch lever will have the specified
free play.
Tighten the locknut.

• If it cannot be done, have the clutch cable adjusted by an authorized Bimota
dealer.

NOTE○ After the adjustment is made, start the engine and check that the clutch does
not slip and that it releases properly

16Drive Chain
Drive Chain Lubrication

Lubrication is necessary after riding through rain or on wet roads, or any time thatthe chain appears dry.
Use a lubricant for sealed chains toPrevent deterioration of chain seals. If the chain is especially dirty, clean it using acleaner for sealed chains following the instructions supplied by the chain cleaner
manufacturer.
Apply lubricant to the sides of theRollers so that it will penetrate to therollers and bushings.
Apply lubricant to the seals so that the seals will be coated with lubricant. Wipe off
any excess lubricant.
Wipe off any lubricant that gets on the tire surface.

•

Drive Chain Slack Inspection

Set the motorcycle up on its side stand.

• Clean the chain if it is dirty, and lubrificate.
• Rotate the rear wheel to find the position where the chain is tightest, andMeasure the maximum chain slack by pulling up and pushing down the chain midway
between the engine sprocket and rear wheel sprocket.

17

A. Chain Slack• If the drive chain is too tight or too
loose, adjust it so that the chain
slack is within the standard value.

Drive Chain SlackStandard: 30~35mm (1.15~1.35in.)Drive Chain Slack Adjustment

Loosen the rear wheel axle

• Adjust left and right chain bolt to
Realize the right tigh of chain• Check that the mark on the chain•

adjuster are at the same position on
the left and right sides.
Rotate the wheel, measure the chain
slack again at the tightest position,and readjust if necessary.

• Rotate both chain adjuster

C

A

B

A. Chain Adjuster Bolt
B. Chain Adjuster
C. Marksbolts to get right alignment of wheel.

WARNINGWARNINGA loose clamp bolt can lead to an
accident resulting in serious injury
or death. Tighten the clamp bolts tothe proper torque.

• Check the rear brake (see Brakes

Misalignment of the wheel will result in abnormal wear, and may
result in an unsafe riding condition.
Align the rear wheel using themarks on the swingarmormeasuring the distance between
the center of the axle and swingarm pivot.

section in this chapter).

BrakesIf you feel there is something wrong
when applying the brakes, have thebrake system checked by anauthorized Bimota dealer immediately.
Brake Fluid Level Inspection

With the brake fluid reservoirs held
horizontal, the brake fluid level must
be kept between the upper andlower level lines.

WARNING
Air in the brake lines diminish
braking performance and cancause an accident resulting in injury or death. If the brake lever orpedal feels mushy when it is applied, there might be air in thebrake lines or the brake may be
defective. Have the brake checked
immediately by an authorized
Bimota dealer.

18

AB

B
C

C

AA

AA

A. Front Brake Fluid Reservoir
B. Upper level Line
C. Lower level Line

A. Rear Brake Fluid Reservoir
B. Upper level Line
C. Lower level Line• Iflower
the fluid level is lower than thelevel line it may indicate thatthe fluid is leaking.
In this case, have the brake systeminspected by an authorized Bimota
dealer.

Brake Pad Wear Inspection

Inspect the brakes for wear. For
each front and rear disc brake caliper, if
the thickness of either pad lining is lessthan below table, replace both pads inthe caliper as a set. Pad replacement
should be done by an authorized
Bimota dealer.
Lining Thickness Service Limit

Front

1.0mm(0.04in.)

Rear

1.0mm(0.04in.)

A. Rear Brake Pads
B. Lining Thickness
C. Service Limit

Brake Light Switches
Brake Light Switch Inspection

Turn the ignitions witch on.

A. Front Brake Pads
B. Lining Thickness
C. Service Limit• The brake light should go on when•

the front brake is applied and or therear brake is applied.
I fit does not, ask your authorized
Bimota dealer to inspect the front
Brake lights witch and or the rear
brake light switch.

19

Suspension System
Front ForkNOTICE
After riding on the normal road, theunpaved road and in the rainy
weather, clean off any dirt (grit,
mud or insect etc.) that stuck toinner tube before it hardens. If the
motorcycle keeps running with thedirt stuck to the inner tube, the oilseal will be damaged and it causes
the oil leak.

WARNING
Improper fork leg adjustment cancause poor handling and loss ofstability, which could lead to an
accident. Always adjust the fork
legs on the left and right side to thesame setting.

Spring Preload Adjustment

The adjuster is located at the top ofeach front fork leg.
Standard

8 turns in
In from the fully seated position(turned fully counterclockwise).

Turn the adjuster clockwise with a wrench (14mm) to increase spring preload and stiffen
the suspension.
Turn the adjuster counterclockwise
To decrease spring preload and soften the suspension.

•

NOTICEDo not turn the adjuster beyond thefully seated position or the
adjusting mechanism may bedamaged.

A.

Spring Preload Adjuster

20

Rebound Damping Force Adjustment

The adjuster is located at the top of
the right front fork leg.

NOTICEDo not turn the adjuster beyond thefully seated position or the
adjusting mechanism may bedamaged.

Standard

20 click closed
Out from the fully closed position (turned
fully clockwise).

• Turn the adjuster clockwise with 3 mm allen
key to increase damping force

Turn the adjuster counter clockwise to
decrease damping force.

NOTICEDo not turn the adjuster beyond thefully seated position or the
adjusting mechanism may bedamaged.

Compression Damping Force Adjustment

The adjuster is located at the top of the left
front fork leg
Standard

20 click closed
Out from the fully closed position (turned
fully clockwise).

Turn the adjuster clockwise with a 3 mmallen key to increase damping force.
Turn the adjuster counterclockwise to decrease damping
force.

21

Rear Shock Absorber
NOTICEDo not turn the adjuster beyond thefully seated position or the
adjusting mechanism may bedamaged.

• Turn the adjuster clockwise toincrease spring preload.
• Turn the adjuster counter clockwise
To decrease spring preload.

Spring Preload Adjustment

The adjuster is located on the rightside on the muffler bracket.

Standard

12 clicks
In from the fully seated position(turned fully counter clockwise).

AA

Rebound and Compression Damping Force Adjustment

The adjusters are located at the upper
end of the rear shock absorber.

BStandard

22 clicks turns out
Out from the fully seated position (turned
fully clockwise).

• Turn the adjuster clockwise with an
Allen key 3 mm to increase
damping force.

• Turn the adjuster counterclockwise to decrease damping
force.

A. Rebound Damping Force Adjuster
B. Compression Damping force Adjuster

NOTICEDo not turn the adjuster beyond thefully seated position or the
adjusting mechanism may bedamaged.

22

Setting tables
Front Fork Spring Preload Setting

Softest setting limit

Standard

Hardest setting limit

0*

8 turns in**18 turns in**

Weak

←→

StrongAdjuster Position
Spring Action
Setting

Soft

←→

Hard

Load

Light

←→

Heavy

Road

Good

←→

Speed

Low

←→

Bad
High

*:This position is the fully seated position(turned fully counterclockwise).
**:In from the fully position (turned fully counterclockwise).This adjustment range
may not exactly match the number shown in the table due to small tolerance of
production.
Front Fork Damping Force Settings

Adjuster Position

Softest setting limit

Standard

Hardest setting limit

Rebound

23 turns out**

20 clickout**

0*Compression

23 turns out**

20 clickout**

0*Pre-load spring

0*8Damping Force

Weak

←→

StrongSetting

Soft

←→

Hard

Load

Light

←→

Heavy

Road

Good

←→

Speed

Low

←→

Bad
High

*: This position is the fully seated position(turned fully clockwise).
**: Out from the fully seated position (turned fully clockwise).This adjustment
range may not exactly match the number shown in the table due to small
tolerance of production.

23

Rear Shock Absorber Spring Preload Setting

Softest setting limit

Standard

Hardest setting limit

Compression Position44

22 clicks**

0

Rebound postion54

22 click**0

Spring pre-load0*

8 turns

18 turns

Spring Action

Weak

←→

StrongSetting

Soft

←→

Hard

Load

Light

←→

Heavy

Road

Good

←→

Speed

Low

←→

Bad
High

*: This position is the fully seated position(turned fully counterclockwise).
**: In from the fully seated position(turned fully counterclockwise).This adjustment
range may not exactly match the number shown in the table due to small
tolerance of production.
Rear Shock Absorber Rebound Force Setting

Softest setting limit
Adjuster Position Rebound54

Standard
22

Hardest setting limit0*

Damping Force

Weak

←→

StrongSetting

Soft

←→

Hard

Load

Light

←→

Heavy

Road

Good

←→

Speed

Low

←→

Bad
High

*: This position is the fully seated position (turned fully clockwise).
**: Out from the fully seated position (turned fully clockwise). This adjustment
range may not exactly match the number shown in the table due to small
tolerance of production.

Rear Shock compression Force Setting

Softest setting limit
Adjuster Position Rebound44

Standard
22

Hardest setting limit0*

Damping Force

Weak

←→

StrongSetting

Soft

←→

Hard

Load

Light

←→

Heavy

Road

Good

←→

Speed

Low

←→

Bad
High

24

Wheels
Tire Pressure Inspection

Remove the air valve cap.

• Check the tire pressure often,
using an accurate gauge.
• Make sure to install the air valve cap
securely.

NOTE○ Measure the tire pressure when thetires are cold (that is, when the motorcycle has not been ridden morethan1.6 km(1mile)during the past 3
hours).

○

Tire pressure is affected by changes inambient temperature and altitude,
and so the tire pressure should be checked
and adjusted when your riding involves wide
variations in temperature or altitude.

25

Headlight
Headlight aiming should be done by
an authorized Bimota dealer.

Vertical Adjustment

The headlight beam is adjustablevertically with a screwdriver. If adjusted
too low, neither low nor high beam will
illuminate the road far enough ahead.
If adjusted too high, the high beam will
fail to illuminate the road close ahead,
and the low beam will blind oncoming
drivers
Turn the vertical adjuster in or out toAdjust the headlight vertically.

•A○ On high beam,NOTE
htest point
the brigA.

should be slightly below horizontal
with the motorcycle on its wheels
and the rider seated. Adjust theheadlight to the proper angle
according to local regulations.

Vertical Adjusters

Headlight
heightcenter

7,6 m
X

X=max 5 centimeters measured from the center of headlight with the motorcycle on thewheel and the driver seated26

Cleaning from anticorrosive
treatments

WARNINGAn anticorrosive treatment applied tothe brake discs will increase braking
distance and can cause an accident
resulting in serious injury or death.
Remove the anticorrosive treatmentusing an oilless solvent.

Clean the front and rear brake discs, swingarm,
plate, right footrest support and left footrest support
using alkaline solvent.

A

A.Brake disc27