The starting mechanism of a motorcycle engine often fails precisely because of the loss of elasticity of the return element. When you press the lever, it should instantly return to its original position, ready for the next shot. If this does not happen, the kick starter remains extended, creating the risk of snagging on obstacles and breaking gear teeth.
Solving the problem requires removing the mechanism cover and installing a new spring. The process is not overly complicated, but requires accuracy and understanding of the principles of operation kick starter. Incorrect installation may cause the spring to simply fly out during assembly or not provide the required tension, rendering the mechanism useless.
Preparing tools and diagnosing faults
Before you start disassembling, you need to make sure that the problem is in the spring. Sometimes the lever does not return due to jamming of the mechanism or lack of lubrication. Carefully inspect the assembly for foreign objects or chipped metal.
For quality repairs, you will need a set of tools that should be on hand. Failure to use the correct key during operation may result in damage to the fasteners. Tools for work include a set of wrenches, screwdrivers, pliers and a specialized spring mandrel.
- 🔧 A set of socket wrenches and sockets (most often
8 mm,10 mmand12 mm) - ⚙️ Fine-nose pliers or round nose pliers
- 🛠️ Mandrel for compressing the spring (can be made from a piece of pipe)
- 💧 WD-40 spray or penetrating lubricant for rusty bolts
If the kick starter lever has play but returns, the problem may be due to worn bushings. If it does not spring back at all or returns with enormous force, this is a sure sign that the spring lost elasticity or broken. In the latter case, replacement is required.
⚠️ Attention: Before starting work, make sure that the motorcycle is on the center stand and the engine is turned off. Rotating the crankshaft during dismantling can result in unpredictable movement of the mechanism.
Removing the kick starter cover
The process begins by removing the protective cover that covers the return mechanism. It is usually secured with several bolts around the perimeter. Unscrew them crosswise to avoid distortion of the lid and damage to the gasket.
After removing the fasteners, carefully remove the cover. Carefully monitor the position of the spring at this moment. She is under tension and if moved carelessly, it can fly out with great force, injuring your hands or getting lost in the grass.
- 🚫 Do not try to unscrew bolts if they are heavily rusted without pre-treatment
- 🔍 Inspect the cover gasket for cracks, replace it if necessary
- 🧼 Clean the contact surface from dirt and old grease before reassembling
Sometimes the lid fits very tightly due to the sealant. Use a plastic scraper or thin screwdriver to carefully pry up the edge. Do not use excessive force to avoid damaging the seat on the engine crankcase.
☑️ Preparing to remove the cover
Removing the old spring and checking the mechanism
Once the cover is removed, you will see a spring wound around the axle or secured in a special groove. Depending on the design of the motorcycle (eg. Yamaha, Honda or Red October), the mounting method may vary. In some cases, the spring is simply put on the axle, in others it has special hooks hooked to the body.
The spring must be removed very carefully. If it is caught in hooks, use pliers to compress the coils and release the hooks. If the spring is wound onto the shaft, it must be carefully rotated counterclockwise while maintaining control over the tension.
After removing the spring, check the condition of the seat. Inspect the kick starter shaft and grooves in the housing for chips or burrs. Any unevenness can cause rapid wear of the new part or its jamming.
- 🔍 Check the shaft for signs of corrosion that may interfere with rotation
- 🛠️ Remove old grease and dirt from all mechanism grooves
- 🔧 Make sure the starter gear rotates freely and is not burred
If you find that the mechanism is sticking even without a spring, the problem may be deeper - for example, wear on the gear or shaft. In this case, replacing the spring will not completely solve the problem, and more complex engine repairs will be required.
- Return spring inside the mechanism
- Spring on the outside of the lever
- Lever without spring (mechanical)
- I don't know/Haven't watched
Installing a new spring: step-by-step algorithm
Installing a new spring is the most critical step. It is important to tension it correctly to ensure sufficient return force, but not to overdo it, so as not to break the mechanism during assembly. The new spring must be installed in the same position as the old one, observing the winding direction.
If the spring has hooks, hook one end to the body and the other to the shaft. To compress the spring, use a mandrel or a special vice. This will allow you to freely lock the other end without losing control of the accumulated energy.
Many DIYers use a rope or wire method to hold the spring compressed during installation. This avoids the risk of the part flying out. Tension the spring gradually, making sure that the coils do not become distorted.
- ✅ Make sure that the spring fits into the groove evenly, without distortion
- 🔄 Check the winding direction (usually counter-clockwise when viewed from above)
- 🛡️ Use gloves to protect your hands from cuts from the spring coils
Once the spring is secured, slowly release the tension to check how it works. The lever should return smoothly and confidently to its original position. If you hear unusual clicks or squeaks, the spring may be installed incorrectly.
⚠️ Attention: Never try to install a spring “by eye” without first checking its tension. A spring that is too weak will not return the lever, and one that is too strong may break the plastic gear when starting.
What to do if the spring is too stiff?
If the new spring seems too stiff, you can grind its coils a little using a file, but this must be done extremely carefully so as not to change the elasticity parameters. It is better to choose a spring with the correct characteristics from the manufacturer.
Assembling the unit and checking operation
After installing the spring, you can begin assembly. Reinstall the cover after lubricating its gasket with a thin layer of sealant or engine oil. This will ensure the tightness of the unit and prevent dust from entering the mechanism.
Tighten the cover mounting bolts. Do this crosswise, gradually increasing the force. Do not over-tighten the bolts to avoid stripping the threads in the aluminum crankcase. The optimal tightening torque varies from motorcycle to motorcycle, but is generally 10-15 Nm.
After assembly, be sure to check the operation of the kick starter. Press the lever several times, making sure it goes down easily and comes back up quickly. The feeling should be springy and crisp.
- 🧪 Check for any play in the mechanism when pressing
- 🔊 Listen for any extraneous sounds when returning the lever
- 🛣️ Crank the engine with the starter to make sure the gears are working correctly
If everything is in order, you can start the engine. It is better to do the first few starts in a gentle mode so that the mechanism “develops” and the spring takes its working position.
Correctly tightening the cover bolts in a criss-cross pattern prevents misalignment and ensures a tight seal without using excess sealant.
| Parameter | Norm | Deviation | Consequences |
|---|---|---|---|
| Return force | Smooth, confident | Weak or absent | Lever does not return, risk of breakage |
| Lever travel | Full, all the way | Sticking or incomplete stroke | Incomplete engine start |
| Sounds during operation | Silence or slight hum | Creaking, clicking, hitting | Worn gears or shaft |
| Tightness | No leaks | Oil leaks from under the cap | Dirt ingress, oil loss |
Typical mistakes when replacing a spring
Many beginners make the same mistake - they install a spring with the wrong winding direction. This leads to the fact that when you press the lever, the spring does not compress, but, on the contrary, tries to unwind, which can lead to its instant destruction.
Another common problem is using the wrong spring model. The elasticity characteristics and spring length may differ even between visually similar mechanisms. Installing an unsuitable part will lead to rapid failure of the entire assembly.
Some craftsmen try to save money and do not change the cover gasket. This often leads to oil leaks, especially if the old gasket has already lost its elasticity. Replacing the gasket - a mandatory procedure for any dismantling of the cover.
- ❌ Do not use old bolts if their threads are damaged
- ❌ Do not ignore cleaning the mechanism before installing a new part
- ❌ Do not use force when tightening bolts in aluminum parts
Also, if it breaks, it may be a sign that the mechanism was working under extreme conditions or was overloaded. Analyze the causes of the breakdown to avoid a repeat of the situation.
Before installing a new spring, lubricate it with a thin layer of graphite grease. This will reduce the friction of the coils against each other and extend the life of the part.
Frequently asked questions and answers
Can I install a spring from another motorcycle model?
Strongly not recommended. Different models have different tension characteristics and sizes. A spring from another model may not provide the required return force or break the mechanism when starting. Always use original spare parts or high-quality analogues designed specifically for your model.
What should I do if the spring breaks during installation?
If the spring breaks, you either applied too much force or used a low-quality part. Stop work immediately, remove any debris and install a new spring. Check the mechanism for damage from splinters before proceeding with assembly.
How often should the kick starter spring be replaced?
The spring is a consumable item and can last for years if used correctly. However, if you notice that the lever returns more slowly or with more force, this is a sign of wear. Regular inspection and timely replacement will prevent more serious damage.
Do I need to lubricate the spring after installation?
Yes, lubrication is required. Use graphite or lithium grease. This will reduce friction between the coils, prevent corrosion and ensure smooth operation of the mechanism. Do not use liquid oils as they will run off quickly and will not provide protection.
Why doesn't the kick starter come back after replacing the spring?
This may be due to incorrect spring installation, a jammed mechanism, or the use of the wrong part. Check the winding direction, make sure the mechanism is clean and lubricated, and that the spring has the required characteristics. If the problem persists, the gears or shaft may need repair.
How to extend the life of a kick starter spring?
To increase the service life of the spring, regularly check the mechanism for contamination, change the lubricant promptly, and avoid sudden and excessively strong impacts on the lever when starting the engine.
Repairing a kick starter is a task that can be completed by any motorcycle owner who has a minimum set of tools and a desire to understand the structure of his vehicle. The main thing is to be careful, use high-quality spare parts and follow assembly recommendations.
A correctly installed spring will return the mechanism to its original performance, ensuring reliable engine starting in any conditions. Don't put off repairs for too long, as a faulty kick starter can cause serious problems down the road.
Remember that regular maintenance and attention to detail are key to long, reliable operation of your motorcycle. If you doubt your abilities, it is better to contact a professional mechanic to avoid costly mistakes.