TOPQuestions and AnswersI’d like to use Yamanaka Special in a scooter. Is it safe to leave it in for a whole season? I heard it might dissolve metal—is that true? Also, is it okay to add it to gear oil?
最終更新日 : 2025/09/08

I’d like to use Yamanaka Special in a scooter. Is it safe to leave it in for a whole season? I heard it might dissolve metal—is that true? Also, is it okay to add it to gear oil?

【About using it for one season】
・Yamanaka Special is an additive that forms a lubricating film, and it's fine to use it for one season as is with an additive amount of 5-10%.

【About the rumor that it melts metal】
・It doesn't have any ingredients that corrode or dissolve metal, and it's a formula that's both safe and proven.
・The info that “it melts metal” is based on a misunderstanding.

【About using it in gear oil】
• Can also be used in scooter final gear oil.

• Provides lubrication and adhesion even under high loads, contributing to wear prevention and smooth operation.

• The recommended usage rate is the same as engine oil, 5–10%.

【Notice of Product Name Change】

We would like to inform you of the following.

Due to the expiration of the contract period, we have terminated our sponsorship agreement with Ryusei Yamanaka as of March 12, 2025.
As a result, the previous product name “LS Bell Hammer Yamanaka Special Concentrate Bottle 80ml” will be discontinued, and the successor product “LS Bell Hammer GP Special Concentrate Bottle 80ml” will be newly launched on March 13, 2025.

Please note that there are no changes to the ingredients, bottle, or capacity, so you can continue to use it with confidence as before.

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