Ktm 50 sx clutch

Ktm 50 sx clutch DEFAULT

Engine & Exhaust

Engine

The high performance 2-stroke engine is extremely compact and powerful, setting the standard in the highly competitive 50 cc class. Its 3-shaft design positions the crankshaft very close to the center of gravity, offering exceptional handling. This design provides a flow-optimized intake angle into the reed valve, which results in impressive performance across the rpm range. Orange anodized CNC machined aluminum clutch and ignition covers provide excellent heat dissipation, durability and, of course, highlight this machine's racing DNA. The multidisc automatic clutch developed by KTM provides controllable acceleration and makes riding this motorcycle as easy as twisting the throttle. The KTM 50 SX FACTORY EDITION features a special clutch configuration for enhanced power delivery, combining extremely agile handling with maximum performance. The clutch can also be easily adjusted to the rider's personal needs or the specific requirements of each individual track within minutes and with no special tools required. A reworked carburetor setting in conjunction with the new engine set up works together with a smaller rear sprocket to make the bike even faster!

Clutch

Developed by KTM, the centrifugal multi-disc automatic clutch has been specifically tuned for the KTM 50 SX FACTORY EDITION. It provides more efficient acceleration and still makes riding this motorcycle the easiest thing in the world. It can be additionally adjusted to the specific requirements of the track and the rider in minutes and without any special tools.

Cooling

Like the big KTM bikes, the KTM 50 SX FACTORY EDITION has a liquid cooling system, which even cools the crankcase. Generously sized radiators ensure outstanding heat dissipation for high reliability, even under extremely heavy duty.

Exhaust

The FMF Powercore 2 silencer and FMF Fatty pipe come standard on the KTM 50 SX FACTORY EDITION and provide an optimized low to mid-range power curve while looking incredible thanks to the nickel-plated, stainless, polished surface of the pipe and the high-grade, pressed, anodized aluminum silencer body. Rich 2-stroke sounds and the Factory appearance are assured with the FMF full system.

Engine

The high performance 2-stroke engine is extremely compact and powerful, setting the standard in the highly competitive 50 cc class. Its 3-shaft design positions the crankshaft very close to the center of gravity, offering exceptional handling. This design provides a flow-optimized intake angle into the reed valve, which results in impressive performance across the rpm range. Orange anodized CNC machined aluminum clutch and ignition covers provide excellent heat dissipation, durability and, of course, highlight this machine's racing DNA. The multidisc automatic clutch developed by KTM provides controllable acceleration and makes riding this motorcycle as easy as twisting the throttle. The KTM 50 SX FACTORY EDITION features a special clutch configuration for enhanced power delivery, combining extremely agile handling with maximum performance. The clutch can also be easily adjusted to the rider's personal needs or the specific requirements of each individual track within minutes and with no special tools required. A reworked carburetor setting in conjunction with the new engine set up works together with a smaller rear sprocket to make the bike even faster!

Clutch

Developed by KTM, the centrifugal multi-disc automatic clutch has been specifically tuned for the KTM 50 SX FACTORY EDITION. It provides more efficient acceleration and still makes riding this motorcycle the easiest thing in the world. It can be additionally adjusted to the specific requirements of the track and the rider in minutes and without any special tools.

Cooling

Like the big KTM bikes, the KTM 50 SX FACTORY EDITION has a liquid cooling system, which even cools the crankcase. Generously sized radiators ensure outstanding heat dissipation for high reliability, even under extremely heavy duty.

Exhaust

The FMF Powercore 2 silencer and FMF Fatty pipe come standard on the KTM 50 SX FACTORY EDITION and provide an optimized low to mid-range power curve while looking incredible thanks to the nickel-plated, stainless, polished surface of the pipe and the high-grade, pressed, anodized aluminum silencer body. Rich 2-stroke sounds and the Factory appearance are assured with the FMF full system.

Chassis

Frame

The modern frame is made of lightweight, high strength chromium molybdenum steel sections. It combines maximum longitudinal stiffness and optimized torsional rigidity. It offers superb handling and precise cornering, in addition to outstanding stability.

Wheels

Super lightweight, black anodized, aluminum rims are paired with high-performance Dunlop Geomax MX 53 tires to offer the best race setup found on the showroom floor. Designed for a wide variety of terrain, the MX 53 tires feature BLOCK-IN-A-BLOCK technology and provide enhanced grip and control.

Front suspension

The lightweight WP XACT front fork with AER technology, a 48 mm USD air-sprung fork developed by WP in close collaboration with KTM, is a split fork with separate functions for each leg. That means damping functions are on the right side, whereas the air spring is in the left. This left leg features a 2-chamber system with a capsuled air cartridge to prevent loss of air pressure. Should the outer seal start to leak, the internal cartridge pressure will keep the bike in position. The air spring is easy to adjust to any rider weight via a single air valve. No extra special tools are required; the fork air pump is supplied with the bike. The right fork leg integrates a damping cartridge that tailors to all your damping needs. It can be adjusted to the track conditions and the rider's preferences with a twist of a dial (compression from the top, rebound from the bottom, 30 clicks each). Right off the dealer floor, this fork (with updated internals and reworked damping characteristics) is more comfortable and more sensitive than ever. But you can still hammer the hell out of it.

Rear suspension

The XACT shock with PDS (Progressive Damping System) from WP is connected directly to the swingarm and features excellent damping characteristics. It can be easily adjusted to the rider's individual preferences and track conditions and offers mm of suspension travel.

Brakes

The KTM 50 SX FACTORY EDITION is fitted with front and rear hydraulic brakes by Formula, combined with lightweight wave discs that are easy to control even for the youngest riders. This ensures the best deceleration in all conditions.

Frame

The modern frame is made of lightweight, high strength chromium molybdenum steel sections. It combines maximum longitudinal stiffness and optimized torsional rigidity. It offers superb handling and precise cornering, in addition to outstanding stability.

Wheels

Super lightweight, black anodized, aluminum rims are paired with high-performance Dunlop Geomax MX 53 tires to offer the best race setup found on the showroom floor. Designed for a wide variety of terrain, the MX 53 tires feature BLOCK-IN-A-BLOCK technology and provide enhanced grip and control.

Front suspension

The lightweight WP XACT front fork with AER technology, a 48 mm USD air-sprung fork developed by WP in close collaboration with KTM, is a split fork with separate functions for each leg. That means damping functions are on the right side, whereas the air spring is in the left. This left leg features a 2-chamber system with a capsuled air cartridge to prevent loss of air pressure. Should the outer seal start to leak, the internal cartridge pressure will keep the bike in position. The air spring is easy to adjust to any rider weight via a single air valve. No extra special tools are required; the fork air pump is supplied with the bike. The right fork leg integrates a damping cartridge that tailors to all your damping needs. It can be adjusted to the track conditions and the rider's preferences with a twist of a dial (compression from the top, rebound from the bottom, 30 clicks each). Right off the dealer floor, this fork (with updated internals and reworked damping characteristics) is more comfortable and more sensitive than ever. But you can still hammer the hell out of it.

Rear suspension

The XACT shock with PDS (Progressive Damping System) from WP is connected directly to the swingarm and features excellent damping characteristics. It can be easily adjusted to the rider's individual preferences and track conditions and offers mm of suspension travel.

Brakes

The KTM 50 SX FACTORY EDITION is fitted with front and rear hydraulic brakes by Formula, combined with lightweight wave discs that are easy to control even for the youngest riders. This ensures the best deceleration in all conditions.

Ergonomics & Comfort

Handlebar

The KTM 50 SX FACTORY EDITION uses a perfectly shaped tapered handlebar made from a high-quality aluminum alloy. It provides a great feeling of control and comfort while little shredders are performing all out. Additionally, the bike comes with new grey ODI lock-on grips, which include a vulcanized grip on the right side and a lock-on grip on the left that does not require glue or wire for mounting. The grips diameter is 5 smaller than before fitting perfectly the smaller hands of the young racers.

Handlebar

The KTM 50 SX FACTORY EDITION uses a perfectly shaped tapered handlebar made from a high-quality aluminum alloy. It provides a great feeling of control and comfort while little shredders are performing all out. Additionally, the bike comes with new grey ODI lock-on grips, which include a vulcanized grip on the right side and a lock-on grip on the left that does not require glue or wire for mounting. The grips diameter is 5 smaller than before fitting perfectly the smaller hands of the young racers.

Bodywork & Graphics

Decals

The KTM 50 SX FACTORY EDITION features special in-mold graphics that clearly emulate the full-sized Factory Race machines. It has a fast, aggressive style that screams READY TO RACE, leaving no doubt as to the bike's high-performance intentions. The blue gripper seat perfectly matches the blue touches in the graphics and adds another Factory touch.

Decals

The KTM 50 SX FACTORY EDITION features special in-mold graphics that clearly emulate the full-sized Factory Race machines. It has a fast, aggressive style that screams READY TO RACE, leaving no doubt as to the bike's high-performance intentions. The blue gripper seat perfectly matches the blue touches in the graphics and adds another Factory touch.

Engine

  • TransmissionSingle-speed automatic
  • StarterKickstarter
  • Stroke40 mm
  • Bore mm
  • ClutchCentrifugal clutch (adjustable)
  • Displacement49 cm³
  • EMSSeletra 2p D36
  • Design1-cylinder, 2-stroke engine

Chassis

  • Weight (without fuel) kg
  • Tank capacity (approx.) l
  • Front brake disc diameter mm
  • Rear brake disc diameter mm
  • Front brakeDisc brake
  • Rear brakeDisc brake
  • Chain1/2 x 3/16"
  • Frame designCentral-tube frame with double-cradle
  • Front suspensionXACT 35 WP Upside-Down fork, Ø 35 mm
  • Ground clearance mm
  • Rear suspensionXACT WP mono shock
  • Seat height mm
  • Steering head angle66 °
  • Suspension travel (front) mm
  • Suspension travel (rear) mm
Sours: https://www.ktm.com/en-us/models/mx/2-stroke/ktmsx-factoryeditionhtml

MAINTENANCE WORK ON CHASSIS AND ENGINE

1

2

1

1

4

30

8

8

1

1

1

3

5

6

8

6

11

9

10

7

Adjusting the centrifugal clutch *

A correctly adjusted centrifugal clutch will provide maximum engine perform-

ance and ease of driving and prevent the engine from overheating. Clutch wear

can affect the clutch engagement speed.

The clutch will slip for a longer period of time at higher clutch engagement

speeds, generating more frictional heat and causing the engine to overheat.

If the clutch engagement speed is too low, the engine will not reach the per-

formance range. In both cases, the engine will not seem to have enough power.

Check the clutch engagement speed every 20 hours and correct if necessary

or have it corrected by an authorized KTM workshop.

To tune your clutch, lay the bike on the left side. To prevent oil from leaking

from the transmission vent hose, run the hose upwards and fasten. Remove

the screws [1] and the clutch cover [2] and discard the gasket.

Block the centrifugal clutch [3] with a suitable driver [4].

NOTE: insert the driver through both holes in the primary drive's drum and

gear wheel.

Loosen the nut [5] on the clutch and pull out the driver.

Remove the nut and shim from the crankshaft.

Screw the extractor (special tool item no. ) onto the clutch

hub [6] with the M5x50 screws, hold the extractor and remove the centrifu-

gal clutch from the crankshaft by screwing in the extractor screw.

Completely remove the centrifugal clutch, bearings and spacing washers from

the crankshaft.

Loosen the HH screws [7] and remove the clutch shoes [8] from the clutch

hub [6]. Remove the HH screws and bushings [9], the spring sets [10] and

the disks [11] from the clutch shoes.

ADJUSTING THE CLUTCH ENGAGEMENT SPEED:

The spring sets contain 14 spring washers [12] that need to be positioned on

top of each other in the order shown in the illustration [A].

Washers are located between the spring sets and the clutch shoes to preten-

sion the spring sets. You can influence the clutch engagement speed by pre-

tensioning the spring set. mm more pretension will increase the clutch

engagement speed by approx. rpm.

The clutch engagement speed is the speed at which the clutch begins to engage

and the motorcycle starts to drive off. The clutch engagement speed is

rpm for the 50 LC engine.

NOTE: a tachometer (special tool item no. ) to test the clutch

engagement speed is available from your KTM dealer.

Make sure the spring sets are not soiled during service or repair work to the

clutch since this can cause them to malfunction.

»

Sours: https://www.manualslib.com/manual//KtmSx.html?page=31
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The KTM 50sx and 50 Mini can be very aggressive bikes right out of the box; they are made for racing after all. Many new riders won’t be expecting the sudden acceleration which can cause them to be thrown to the rear of the bike, or even worse, they could end up whiskey throttling and lose control of the bike altogether. Lucky for us, KTM offers an adjustable clutch. This allows parents to wind down the clutch so when the rear tire engages, it won’t be as aggressive. As your child becomes more comfortable, the clutch can be wound up giving them a more forceful take off suitable for racing.

Tuning the clutch on these dirt bikes is simple and easy. We will start by draining the gearbox oil. Then after removing the clutch cover, we will show you how the clutch works as well as how to adjust the number of clicks. After you’ve mastered tuning, we will give you some recommended settings to try out depending on your rider’s skill level. At the end, we will show you a few tricks on how you can do this at the track without needing to drain the gearbox oil as well as some useful clutch covers that allow for changing the clicks without the need to remove the cover.

We will start by draining the bike’s gearbox/clutch oil. This is most easily performed with the bike on a side stand. A center stand can be used but this makes the process much more difficult. If you don’t currently have a side stand, we strongly recommend getting one for maintenance purposes. Pit Posse offers a universal triangle stand that we find comes in handy.

Draining the Oil

Begin by removing the oil cap from the throttle side of the bike. This prevents a vacuum from forming within the gearbox and will assist in ensuring the oil is drained thoroughly. Next, locate the oil drain bolt on the left-hand side of the bike. Place an oil pan under the bike and slowly remove this bolt. These drain bolts are magnetic, and the tip will collect filings. It is a good idea to thoroughly clean these when changing the oil since they will collect a lot of gunk. Leave the bike for a few minutes to ensure the oil is completely drained. Once sufficiently drained, replace the oil drain bolt and toque to 20 Nm ( lb-ft).

Removing the Clutch Cover

With the oil drained, the clutch cover can now be removed. Locate the clutch cover on the right-hand side of the bike. There are four 8mm bolts holding the cover in place. Remove these four bolts and carefully remove the cover. You may need to wiggle the back brake to make enough room. Be careful removing the cover to avoid doing any damage to the engine case.

Adjusting the Clutch

There are three adjustable bolts that are connected to your springs and they will be used to adjust the clutch. If you don’t see these bolts, rotate the clutch basket until they become visible. We will start by turning these counterclockwise until it stops. Once the bolt is fully unwound, you will want to turn it clockwise until you hear and feel the click. This setting is click 1. As the bolt is turned further clockwise, the click setting is increased. The bolt can be clicked up to a maximum of 17 times. It is important to remember that all three bolts will need to be set to the same click number.

Attaching the Clutch Cover

Now that the clutch is tuned to the desired number of clicks, the clutch cover can be replaced. If needed, replace the old seal ring with a new one. Be careful sliding the clutch cover underneath the break. You want to be sure not to gouge up the case. With the cover in place, reattach the four 8mm bolts. Using a torque wrench, ensure these are tightened to 10 Nm ( lb-ft).

Refilling the Bike with Gear Oil

With the clutch adjusted and the cover replaced, we’re ready to refill the bike with oil. The manual recommends using Motorex ATF Dextron 3. Regardless of whether you have a mini or a pro-senior, the bike will take mL of oil. You’re going to want to make sure that’s accurate and a cheap way to do that is using a small measuring cup like this. Not enough oil and you risk burning everything up and if you happen to use too much oil you can end up blowing your seals. It can be a little tricky getting to the oil fill cap and you will have to use a small funnel to fill it up. Finish by screwing the oil cap down firmly.

Adjusting the Clutch at the Track

It’s possible to adjust the clutches on the KTM 50s without draining the oil and removing the clutch cover. This can come in handy at the track when you have to make a change quickly. This can be done by laying the bike down on its side. Ideally, you want to position it so that the clutch cover is level and no oil will leak out when the cover is removed. To make it even easier, there are clutch covers specifically designed to allow for adjusting the clutch without the need to remove them. These covers allow you to turn the clickers through a small port in the side of the cover and don’t even require leaning the bike over on its side. In addition, this cover holds an additional 50cc of oil. This extra oil will help keep your clutch running cool and slow down the wear.

Click Recommendations

The KTM 50sx clutch comes from the factory at 9 clicks. This is a good intermediate between an extremely snappy response and a more beginner-friendly option. We don’t recommend going any lower than 6 clicks. In our experience, going lower than 6 clicks results in unnecessary clutch wear as heat builds up. If 6 clicks is still too aggressive, you can always put on a 39 or 38 tooth sprocket. The new sprocket will give it more top end and reduce the torque down low. On the other hand, we wouldn’t recommend going passed 13 clicks. At this point, the adjustments don’t seem to make much of a difference and at this setting, the clutch springs will be frequently wearing out.

Beginner &#; 6 Clicks

Standard &#; 9 Clicks

Experienced &#; 13 Clicks

These are just starting points and we recommend you experiment with your own settings. Once your child starts to feel comfortable with a given setting, go ahead and move a click up. The clutch on these dirt bikes can be a little tricky at first but soon you will be making adjustments in minutes. Tuning the clutch to fit your child’s needs will increase their confidence at the track and lead to faster lap times and more enjoyable ride days.

Categories KTM 50Sours: https://www.themxlife.com/ktm/adjusting-the-clutch/

Tomar Holeshot Clutch KTM 50 SX

Product Details


Tomar Holeshot Clutch KTM 50 SX

The Tomar™ Holeshot series is specifically designed for maximum performance and durability in 50cc stock & modified motocross bikes. The fully CNC machined clutch utilizes state of the art materials and is manufactured to precision, race-quality tolerances. The friction disc is the latest technology capable of handling the higher temperatures created by the stall speeds of the 50cc stock and modified engines. This combination provides a clutch that is capable of transferring the torque to the rear wheel for an incredible holeshot" and performance that outlast the competition.
  • Compatible with KTM PRO JR & PRO SR MX bikes (up to model)
  • Each clutch is engineered specifically for its application to maximize performance potential
  • Transfers torque to the rear tire when it's needed most
  • Friction disc utilizes state-of-the-art material to handle higher temperatures created by high stall speeds
  • Fully CNC-machined parts ensure durability
  • Requires Installation Kit TOM, Clutch Holder Wrench TOM and Clutch Puller Tool TOM See Related Items
"
Sours: https://aomc.mx/mm5/

Sx clutch 50 ktm

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KTM 50 Clutch Service .

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