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| {{Motorcycle
| | #Redirect [[Honda CB750K]] |
| |name = [[Honda]] CB750K4
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| |photo=honda-cb750k4-74-02.jpg
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| |aka =
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| |manufacturer = Honda
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| |parent_company =
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| |production = 1974
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| |model_year =
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| |predecessor =
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| |successor =
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| |class =
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| |engine = Four stroke, transverse four cylinder, SOHC, 2 [[valve]] per cylinder.
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| |bore_stroke =
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| |compression = 9.0:1
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| |top_speed = 198 km/h / 123.2 mph
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| |power =
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| |torque =
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| |fuel_system =
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| |ignition = Battery, ignition coil
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| |spark_plug = NGK D8ES-L, NDX 24 ES
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| |battery =
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| |transmission = 5 Speed
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| |frame = Tubular steel duplex cradle
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| |suspension =Front: Telescopic forks non adjustable. <br>
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| Rear: Swingarm, dual shocks, preload adjustable.
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| |brakes =
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| |front_tire = {{tire|3.25-19}}
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| |rear_tire = {{tire|4.00-18}}
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| |rake_trail =
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| |wheelbase = 1453 mm / 57.2 in.
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| |length =
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| |width =
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| |height =
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| |seat_height = 810 mm / 31.9 in.
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| |dry_weight =
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| |wet_weight = 218 kg / 479 lbs
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| |fuel_capacity = 17 L / 4.5 US gal
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| |oil_capacity = 3.5 L / 3.7 US quarts
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| |fuel_consumption =
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| |turning_radius =
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| |related =
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| |competition =
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| }}
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| It could reach a top speed of 198 km/h / 123.2 mph.
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| ==Engine==
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| The engine was a Air cooled cooled Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder.. The engine featured a 9.0:1 [[compression ratio]].
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| ==Drive==
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| Power was moderated via the Multi-plate, wet.
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| ==Chassis==
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| It came with a 3.25-19 front [[tire]] and a 4.00-18 rear tire. The front suspension was a Telescopic forks non adjustable. while the rear was equipped with a Swingarm, dual shocks, preload adjustable.. The CB750K4 was fitted with a 17 L / 4.5 US gal fuel tank. The wheelbase was 1453 mm / 57.2 in. long.
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| == Photos ==
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| [[File:honda-cb750k4-74-02.jpg|600px|Honda CB750K4]]
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| [[File:Honda-CB750K4-74.jpg|600px|Honda CB750K4]]
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| [[File:honda-cb750k4-74-01.jpg|600px|Honda CB750K4]]
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| == Overview ==
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| Honda CB 750 Four K4
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| The CB750K4 Four was sold in 1974 and was available
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| in one of three colors: Flake Sunrise Orange, Freedom Green Metallic, or Boss
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| Maroon Metallic. The gas tank stripes were white, gold and black. The side
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| covers were smaller than the K0 model and there were no slots on the leading
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| edge. The speedometer showed increments of 20 (i.e., 20, 40, 60, 80, etc.). The
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| upper forks were chrome. The white tank pinstripe was wider than the K3 model.
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| The headlight shell was black. The taillight and side reflectors were larger
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| than the K1 model. There was a two-throttle cable system (pull open and pull
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| closed). The exhaust system was a 4-into-4. The engine was a 736cc SOHC 2-valve
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| dry sump inline 4 cylinder linked to a 5-speed transmission and chain drive. The
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| serial number began CB750-2300001.
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| It is no exaggeration to say the Honda CB750
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| is the most significant motorcycle ever made and altered the
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| world of motorcycling forever. Prior to the CB750 you had two
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| choices in motorcycles: You could have a small, reliable
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| Japanese bike or you could have a larger, faster but unreliable
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| bike. The CB750 proved to the doubters that the Japanese could
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| build a large bike (a 750 was considered monster-size in those
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| days.) It was the first to come standard with a hydraulic disk
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| brake. It had both electric and kick start. It started every
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| time, parts didn't fall off and it didn't leak oil. We take
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| these things for granted today but it really meant something in
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| 1970!
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| It wasn't all about practical everyday driving either. The CB750
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| was equally at home on the racetrack. A modified CB750 won the
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| 1970 Daytona and set a new track record. The world took notice.
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| The British motorcycle industry, notorious for unreliable
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| motorcycles and already on the ropes, was finally put out of
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| their misery. This bike and its successors very nearly put
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| Harley-Davidson out of business too. The CB750 raised the bar in
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| the industry. You had to either improve your designs or get out
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| of the motorcycle business.
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| Honda built about a million of the CB750s over its ten year
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| history. To get a feel for how popular that is consider that
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| BMW, which has been making motorcycles far longer than Honda,
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| only recently rolled its millionth bike off the assembly line.
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| I was only five years old when the CB750 first appeared so I was
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| too young to understand its importance. The CB750 was a common
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| "college" bike when I was in school. They were reliable,
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| plentiful and cheap. You could keep those bikes going forever. I
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| bought this bike to relive those times and see if a twenty-seven
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| year old bike could still compare to a modern machine.
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| My 1974 CB750 came from a collector who had partially restored
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| it. It is in excellent mechanical condition, very good cosmetic
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| condition and the mileage is low (13,000 miles when purchased.)
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| It's a good candidate to compare to modern motorcycles. My
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| girlfriend has named her "Pumpkin" for her bright orange color.
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| On to the good stuff. How is it to ride? The short answer is it
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| is still fun to ride today. No, Pumpkin can't match modern
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| motorcycles in many ways but the differences are not annoying
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| and there is a certain special satisfaction when riding a bike
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| that is a part of history.
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| The differences become pronounced once you start to push the
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| bike and feel around the edges. The CB750 is much heavier than
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| modern bikes and perhaps more important it carries its weight
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| high. You have to keep this in mind when corning at speed but it
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| generally doesn't get in the way. The single disk brake with its
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| one piston caliper was the marvel of its day but pales in
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| insignificance compared to something like the antilock power
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| brakes on my BMW R1150RT. The right attitude for any bike of
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| this vintage is to think of the brakes as something that slow
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| you down rather than stop you.
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| Acceleration is quick and torque is adequate at high revs as you
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| would expect in an inline four. She can keep up with modern
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| sport bikes in the straights although the handling is inferior
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| in the curves.
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| The engine takes a few minutes to warm up before it's happy.
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| This is still true today with modern inline fours but computer
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| controlled ignition and fuel injection take all the fun out of
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| it. You have to adjust the idle level and there never really is
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| anything like keeping it spot on. After riding at high speed for
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| several minutes the engine reaches its maximum normal operating
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| temperature and you will notice the idle creeping up to 2,000
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| rpm. Just live with it or get used to reaching behind the carbs
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| and adjusting the idle screw with your left hand. Careful not to
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| burn yourself!
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| The petcock is oddly on the right side of the frame. What
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| happens when you're riding and have to switch to reserve? The
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| only safe thing to do is pull over to turn the petcock.
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| But these are nothing more than little quirks that give the bike
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| its character. Pumpkin is still every bit as competent a street
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| bike as she was in 1974 and none of the pleasure has faded.
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| There is a reassuring feeling about having the kickstart on the
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| bike. Honda felt that customers weren't ready to trust an
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| electric starter so they included one. Pumpkin starts on the
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| first or second kick when warm. I haven't tried to kickstart her
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| when cold.
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| I'm glad to have her. Despite her age she still puts a smile on
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| my face and that is, after all, the final test.
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| {| class="wikitable"
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| |-
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| !Make Model
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| |Honda CB 750 Four K4
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| |-
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| !Year
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| |1974
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| |-
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| !Engine Type
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| |Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder.
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| |-
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| !Displacement
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| |736 cc / 44.9 cub in.
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| |-
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| !Bore X Stroke
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| |61 х 63 mm
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| |-
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| !Compression
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| |9.0:1
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| |-
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| !Cooling System
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| |Air cooled
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| |-
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| !Lubrication
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| |Dry sump
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| |-
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| !Induction
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| |4 x 28 mm Keihin carburetors
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| |-
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| !Ignition
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| |Battery, ignition coil
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| |-
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| !Spark Plug
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| |NGK D8ES-L, NDX 24 ES
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| |-
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| !Starting
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| |Electric, kick
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| |-
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| !Max Power
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| |50 kW / 67 hp @ 8000 rpm
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| |-
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| !Max Torque
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| |44 lb-ft / 60 Nm @ 7000 rpm
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| |-
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| !Clutch
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| |Multi-plate, wet
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| |-
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| !Transmission
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| |5 Speed
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| |-
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| !Final Drive
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| |Chain
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| |-
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| !Gear Ratios
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| |1st 13.99 / 2nd 9.54 / 3rd 7.45 / 4th 6.14 / 5th 5.26:1
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| |-
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| !Frame
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| |Tubular steel duplex cradle
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| |-
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| !Front Suspension
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| |Telescopic forks non adjustable.
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| |-
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| !Front Wheel Travel
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| |143 mm / 5.6 in.
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| |-
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| !Rear Suspension
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| |Swingarm, dual shocks, preload adjustable.
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| |-
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| !Rear Wheel Travel
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| |85 mm / 3.3 in.
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| |-
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| !Front Brake
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| |Single 296 mm disc
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| |-
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| !Rear Brake
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| |179 mm Drum
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| |-
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| !Front Tire
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| |3.25-19
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| |-
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| !Rear Tire
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| |4.00-18
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| |-
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| !Rake
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| |27°
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| |-
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| !Trail
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| |95 mm / 3.7 in
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| |-
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| !Dimensions
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| |Length: 2175 mm / 85.6 in. Width: 870 mm / 34.3 in. Height: 1170 mm / 46.1 in.
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| |-
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| !Wheelbase
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| |1453 mm / 57.2 in.
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| |-
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| !Seat Height
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| |810 mm / 31.9 in.
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| |-
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| !Ground Clearance
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| |140 mm / 5.5 in.
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| |-
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| !Wet Weight
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| |218 kg / 479 lbs
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| |-
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| !Fuel Capacity
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| |17 L / 4.5 US gal
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| |-
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| !Reserve
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| |5 L / 1.3 US gal
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| |-
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| !Oil Capacity
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| |3.5 L / 3.7 US quarts
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| |-
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| !Consumption Average
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| |6.9 L/100 km / 14.6 km/l / 34.3 US mpg
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| |-
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| !Braking Distance 48 Km/h / 30 Mph - 0
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| |10 m / 32.9 ft
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| !Braking Distance 97 Km/h / 60 Mph - 0
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| |41 m / 135.7 ft
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| |-
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| !Standing ¼ Mile
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| |13.5 sec / 100.9 mph
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| |-
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| !Top Speed
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| |198 km/h / 123.2 mph
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| |-
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| !Colours
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| |Flake sunrise orange, Freedom green metallic, or Boss maroon metallic
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| |}
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| [[Category:Honda motorcycles]]
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