Removing the kickstarter on a pit bike: disassembling the mechanism without damage

The kickstarter on a pit bike is a unit that sooner or later requires maintenance: be it replacing a worn spring, repairing a gear, or completely replacing the mechanism. However, its dismantling often becomes a headache for owners due to the close arrangement of parts and the risk of damaging oil seals or break the thread. This article will help you figure out how to properly remove the kickstarter on popular models of pit bikes - from budget ones Pitster Pro to professional KTM SX, - avoiding typical mistakes and not contacting the service.

We will consider the process in detail using the example of 4-stroke and 2-stroke engines, we will indicate critical moments where 80% of beginners make mistakes (for example, when removing a retaining ring or fixing a crankshaft), and we will provide a checklist of tools. You will also learn how to diagnose a kickstarter malfunction before disassembly - this will save time if the problem lies in another unit.

Preparation: tools and working conditions

Before you begin dismantling, make sure you have everything you need. Working with a kickstarter requires precision - missing even one tool can cause damage bearings or oil seals. Here is the minimum set:

• 🔧 A set of sockets and ratchet wrenches (necessarily with an extension to access hidden bolts).
• 🔨 A hammer with a soft striker (rubber or plastic) - for knocking out the kickstarter axle.
• 🔗 Retaining ring remover (nose-nose pliers will not work - there is a risk of breaking the ring).
• 🧲 Magnetic holder - so as not to lose small parts (springs, balls).
• 📸 Smartphone for photographing the stages of disassembly (useful for reassembly).
• 🧴 Thread sealant (for example, Loctite 243) - for fixing bolts.

It is better to carry out work in a well-lit room with a flat surface. If the pit bike is on a stand, secure it to prevent it from tipping over when applying force. For 2-stroke engines (Husqvarna TC 50, KTM 50 SX) it may be necessary to remove the muffler - prepare a gasket for reinstallation in advance.

⚠️ Attention: Do not use WD-40 or similar sprays to "make it easier" to remove the kickstarter bolts. If liquid gets on clutch or cart will lead to slippage and expensive repairs. For stuck threaded connections, use PB Blaster or kerosene, applying them pointwise.

Malfunction diagnosis: is the problem really in the kickstarter?

Before disassembling the mechanism, make sure that the malfunction is not related to other components. Typical symptoms of a “dying” kickstarter:

• 🔄 The lever turns idle (there is no engagement with the crankshaft gear).
• 🔊 Crunching or grinding noise when you press the kickstarter.
• 🛑 The lever gets stuck in the upper or lower position.
• 🔧 Vibration or play of the lever.

However, similar signs may indicate:

• 🔋 Discharged battery (if the pit bike has an electric starter).
• 🛢️ Thickened oil in the engine (especially after winter downtime).
• 🔗 Worn gear on the crankshaft or input shaft.

For an accurate diagnosis:

1. Remove the kickstarter cover and visually inspect the gear for chips.
2. Check the play of the lever axis - if it exceeds 1–1.5 mm, replacement is required bushings or bearing.
3. Turn the crankshaft by hand (through the spark plug hole) - if it rotates tightly, the problem may be piston group.

How to check the crankshaft gear without disassembling it?

Remove the kickstarter cover and try turning the gear on the crankshaft by hand. If it rotates with jamming or has visible chipped teeth, replacement is required. Also pay attention to the condition return spring: If it is stretched or broken, the lever will not return to its original position.

Step-by-step dismantling of the kickstarter: universal instructions

The algorithm for removing the kickstarter is the same for most pit bikes, but there are nuances depending on the model. Below are universal instructions taking into account the features Yamaha PW50, Honda CRF50 And Kawasaki KX65.

Step 1: Removing the Kickstarter Cover

• Unscrew the cover mounting bolts (usually 4–6 pieces). On some models (KTM 50 SX) the cover is combined with the clutch cover - you will have to remove both.
• Carefully pry off the cover with a screwdriver, avoiding damage to the gasket. If the gasket is stuck, use a plastic scraper.

Step 2. Fixing the crankshaft

This the most critical stage - if the crankshaft rotates when unscrewing the kickstarter nut, damage may occur thrust bearing or oil seal. Fixation methods:

• 🔧 Through the spark plug hole: insert a screwdriver between the piston and cylinder head (4-stroke engines only!).
• 🔗 A special crankshaft clamp (for example, Motion Pro 08-0544).
• 🛠️ For 2-stroke engines: secure the flywheel through the window in the crankcase.

Step 3: Removing the kickstarter mechanism

1. Unscrew the kickstarter axle mounting nut (usually 14-17 mm in size). On some models (Honda CRF150R) the nut can be a hexagon.
2. Remove the retaining ring from the axle (use a puller!).
3. Carefully tap out the axle with a soft-faced hammer. Do not use excessive force - if the axle does not budge, check that all fasteners have been removed.
4. Remove the kickstarter gear and return spring. Remember their relative positions!

Take photographs of the location of the parts|Check for the presence of retaining rings|Prepare a container for small parts (springs, balls)|Apply marks to the cover and housing for proper reassembly|Check the crankshaft fixation-->

Features for popular pit bike models

Kickstarter design may vary depending on the manufacturer. Below are the key nuances for the most common models.

Pit bike model	Features of dismantling	Typical problems
Yamaha YZ50/85	The kickstarter cover is combined with the clutch cover. Removal of the exhaust system is required.	Frequent wear return spring and gears on the crankshaft.
Honda CRF50/110	Hexagon kickstarter axle nut (10 mm). The retaining ring is thin and breaks easily.	Lever jamming due to dirt getting into the mechanism.
Kawasaki KLX110	An additional cover fastening bolt is hidden under the frame. Removal of the footrest is required.	Wear axle bushings kickstarter.
KTM 50 SX	The kickstarter cover is plastic and breaks easily during dismantling.	Chipped teeth on the crankshaft gear.
Pitster Pro XR50	There is no locking ring - the axle is fixed due to spring pressure.	Loss retainer balls when parsing.

For Chinese pit bikes (Lexmoto, Zongshen) be prepared for non-standard bolt sizes and low quality metal. Often the kickstarter axle nuts have a left-hand thread - this is indicated in the manual, but many people forget about this and break off the edges.

⚠️ Attention: On pit bikes Stacyc and other electric models do not have a kickstarter - do not confuse them with their gasoline counterparts. If your pit bike is equipped only with an electric starter, but you want to install a kickstarter, you will need to replace the crankcase cover and modify the crankshaft (installing a gear).

Common mistakes and how to avoid them

Even experienced mechanics sometimes make mistakes when working with a kickstarter. Here are the most common mistakes and how to prevent them:

• 🔧 Thread breakage on the kickstarter axle. Cause: Use of an incorrect wrench or excessive force. Solution: Always use a socket with a ratchet wrench and extension, rather than an open-end wrench.
• 🛑 Loss of retainer balls. When disassembling the mechanism, balls (usually 2-3 pieces) may fall out and get lost. Solution: Work on a clean surface or use a magnetic mat.
• 🔄 Damage to the crankshaft seal. When knocking out the kickstarter axis, you can hit the oil seal, which will lead to an oil leak. Solution: Before dismantling, wrap the axle with electrical tape, leaving only the end free for knocking out.
• 🔊 Incorrect return spring installation. If the spring is installed with a twist, the kickstart lever will stick. Solution: before assembling, check that the spring coils lie flat, without overlap.

Another common problem is Kickstarter gear jamming on crankshaft. This occurs due to corrosion or deformation of the teeth. Don't try to knock it down with a hammer! Use a puller or heat the gear with a hair dryer (up to 100–150°C) - the metal will expand and the part will be easier to remove.

Reassembly: nuances and verification

Assembly of the kickstarter should be done in reverse order, but there are several critical points:

1. Lubrication of parts. Before installing the gear and axle, apply a thin coat molybdenum grease on rubbing surfaces. Avoid lithol or solid oil - they cannot withstand high loads.
2. Tightening the axle nut. The tightening torque is usually 20–25 Nm (check the manual!). Over-tightening will lead to thread deformation, and under-tightening will lead to play in the lever.
3. Checking the work. After assembly, press the kickstart lever several times by hand (without starting the engine). He must:
• Smoothly return to the starting position.
• Do not have more than 1 mm play.
• Clearly engage with the crankshaft gear (without slipping).

If after assembly the lever moves slowly or jams, disassemble the mechanism again and check:

• Correct installation return spring.
• Condition bushings And bearings axes.
• No misalignment of the kickstarter gear.

When to turn to professionals?

Not all kickstarter problems can be fixed on your own. Contact the service if:

• 🔧 Replacement required gears on the crankshaft (you need a puller and experience with engine disassembly).
• 🛑 Cracks were found on the crankcase housing or kickstarter cover.
• 🔊 When cranking the crankshaft, a metallic knock is heard (possible wear main bearings).
• 🔥 The engine does not start even after repairing the kickstarter (the problem may be ignition system or fuel supply).

The cost of professional repair of a kickstarter in the service varies from 1,500 to 5,000 rubles, depending on the complexity. For example, replacing a gear on a crankshaft with Honda CRF150R will cost 3,000–4,000 rubles including labor and spare parts. If you are not confident in your abilities, it is better to overpay for service than damage the engine.

However, most problems (replacing a spring, cleaning the mechanism from dirt, replacing an axle) are quite within the capabilities of even a beginner if he has a high-quality tool and patience.

FAQ: Frequently asked questions about kickstarter on a pit bike

Is it possible to drive without a kickstarter if it is broken?

Yes, if the pit bike has an electric starter. However, on track models (KTM SX, Yamaha YZ) kickstarter is often the main method of starting, especially after falls when the battery may be drained. In this case, it is recommended to correct the problem before your next trip.

How often should a kickstarter be serviced?

It is recommended to carry out a preventive inspection of the kickstarter mechanism every 20–30 hours or once a season. Pay special attention to:

• Condition return spring (it should be elastic, without cracks).
• Clean the mechanism (remove dirt and sand that gets through the seals).
• Lever axis play.

On competition pit bikes (e.g. Kawasaki KX65) the kickstarter is checked before each race.

How to lubricate the kickstarter after assembly?

Suitable for lubricating the kickstarter axle and gear:

• Molykote G-Rapid Plus (molybdenum grease, withstands high loads).
• Husqvarna Moly Grease (specialized lubricant for motorcycles).
• LIQUI MOLY LM 47 (universal lubricant with molybdenum disulfide).

Do not use Litol-24 or Solid oil — they are not designed for high friction speeds and are quickly washed out.

Why does the kickstarter work poorly after repair?

There may be several reasons:

1. The kickstarter axle nut is overtightened (check the tightening torque).
2. The return spring is deformed (install a new one).
3. Dirt or sand getting into the mechanism (disassemble and wash with kerosene).
4. Wear axle bushings (needs replacement).

If the problem persists, check the alignment of the kickstarter gear and crankshaft - perhaps there was a misalignment during assembly.

Is it possible to install a kickstarter on a pit bike that did not have one?

Technically yes, but it will require serious modifications:

1. Replacing the crankcase cover with a model with a seat for a kickstarter.
2. Installing the gear on the crankshaft (the crankshaft may need to be replaced).
3. Modification of the frame to mount the lever.

For example, on Honda CRF150R (where the kickstarter is not included in the basic configuration) such modifications will cost 15,000–20,000 rubles, taking into account spare parts and labor. The feasibility depends on the purpose of using the pit bike.