Yamaha R1 Fork Leaking Oil
Fix a Leaking Fork Seal Yourself
On the Yamaha R1, oil-covered fork tubes or oil traces on the front fork are a common problem. In most cases, the cause is aged or hardened fork seals. With LecWec, you can restore the sealing effect directly without immediately dismantling the fork. The additive works throughout the system and helps return the seals to proper working condition.
âś“Oil leak stop for leaking fork seals
âś“Long-lasting sealing effect for many years
âś“Oil sealing additive without chlorine
âś“Seal the fork without dismantling
How LecWec Works in the Yamaha R1 and Other Yamaha Forks
On the Yamaha R1 and similar Yamaha models, the front fork uses polymer seals and fork seals to keep the fork oil inside the system. Due to heavy loads, temperature changes and constant movement, these seals lose elasticity over time. The result: the sealing lip no longer sits properly against the fork tube, an oil film develops or fork oil begins to leak visibly. This is exactly where LecWec works during normal operation.
After being added, LecWec distributes through the oil and reaches the seals directly inside the system. The active ingredients are absorbed by the fork seals and help the material become flexible, supple and tightly sealing once again. This closes the fine gaps between the seal and the fork tube. The effect works directly at the sealing edge, exactly where proper sealing is most important.
In practical use, this means that oil leaks at the fork are greatly reduced or stopped completely without immediately dismantling the fork assembly. Especially in cases of slightly leaking fork seals, LecWec restores the sealing function of the existing components and helps maintain clean and dry fork operation.
Only 3% of the total oil quantity.
LecWec is chlorine-free.
For all oil systems and types.
Direct delivery from the manufacturer.
It happened even faster than I expected.
"I have to report positively that the level matches the oil... unbelievable. [...] I wouldn’t have believed that the steering gearbox would be sealed again after just under a week."
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"...nothing was leaking anymore!!!
I am truly very satisfied. At first, I did not believe the product would work, but now I am completely convinced and also saved many hundreds of euros!"
- JĂĽrgen R.
Oil leak at the cylinder base gasket
Verified review (Learn more)"I did not believe it at first, but your product is excellent! [...] I ordered just one can and everything is sealed already, even though you recommend 2 cans, meaning 200 ml, for 6 liters of oil. Many thanks!"
- Andreas F.
Oil leak problems at the oil flange gasket
Verified review (Learn more)"...which made it even more satisfying when, after around 3 weeks, I noticed that the oil loss had gone down to zero – the steering rack was sealed again!! Even now, after 4 months, the reservoir is still at the maximum level."
- Friedger F.
Oil leak at the steering rack
Verified review (Learn more)"There was always a small puddle of oil collecting underneath the vehicle. I added 100 ml of LecWec to around 4 liters of oil. Since then, I have driven many miles and was surprised to find that there was no more oil on the ground at all."
- Paul R.
Leak at the oil pan
Verified review (Learn more)
How to Seal a Yamaha R1 Fork in 3 Steps
With the Yamaha R1, you may know the issue: oil film on the fork tube, oil traces on the fork, or oil drops at the fork bottom. The cause is usually aged polymer shaft seals that lose their sealing performance over time and under stress. Instead of dismantling the fork immediately, you can address the issue directly and restore the seals to working condition within the system.
Step 1: Clean the fork and check whether the oil leak is actually coming from the shaft seal.
Step 2: Add LecWec to the fork oil at a ratio of 3% of the total oil volume.
Step 3: Ride the motorcycle normally – through fork compression, the additive circulates and reaches the sealing edge of the shaft seal.
The shaft seals absorb the active formula, become flexible again, and fit tightly against the fork tube once more. This removes the oil film and restores the fork to a sealed condition. You avoid removing the fork and quickly bring your Yamaha R1 back to a clean and leak-free condition.
Yamaha Fork Leaking Oil? These 5 Tips Can Help
Identify typical weak points on the fork
On Yamaha motorcycles, leaks are usually caused by the shaft seal or dust seal. Clean the fork tube thoroughly and compress the fork several times. This allows you to determine whether the oil film is coming directly from the seal and not running down from above.
Check the fork tube and surface condition
Even small dirt particles, insect residue, or fine scratches on the fork tube can prevent the shaft seal from sealing properly. Inspect the surface carefully and clean it thoroughly. A clean running surface is essential for proper sealing performance.
Treat aged shaft seals directly
Yamaha motorcycle forks use polymer seals that harden over time due to movement and temperature. As a result, they lose their sealing performance. Instead of dismantling the fork immediately, you can restore the seals’ elasticity and sealing function directly within the system.
Use LecWec in the fork system
Add LecWec to the fork oil at a ratio of 3% of the total oil volume. Through fork compression, the additive circulates throughout the system and reaches the sealing edge of the shaft seal. This improves sealing performance exactly at the critical point.
Check sealing performance and reapply if necessary
After application, move the fork normally and inspect it regularly. In practical use, the oil film usually disappears or is significantly reduced. If necessary, a small additional dosage can stabilize the effect and keep the fork permanently sealed.