Compatibility: SYM JET SL 125 / DRGBT / DRGBT-ll / MMBCU 158
Unlock free horsepower and optimize cooling with the KOSO High-Efficiency Water Pump (NH370000). Unlike the heavy standard pump, KOSO offers two specialized impeller sizes designed to reduce parasitic engine drag and match your specific engine build.
Choose Your Performance Spec
The OEM impeller is 44.5mm, which creates significant drag. KOSO optimizes this with smaller, more efficient designs:
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Option A: 30mm Impeller (Power Focus)
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Best for: Stock engines or builds under 180cc.
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Benefit: Significantly reduces mechanical resistance and rotational loss, freeing up engine power for faster acceleration.
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Option B: 38mm Impeller (Cooling Focus)
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Best for: Big bore kits or builds over 180cc.
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Benefit: Larger surface area increases coolant flow volume to manage the higher heat of modified engines, while still offering less drag than stock.
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Key Engineering Features
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Reduced Drag: Optimized central shaft splitter and flow path design minimize water flow resistance.
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Top-Tier Reliability: Equipped with premium NTN Ball Bearings for smooth, long-lasting operation.
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Long-Life Sealing: Advanced oil seal design ensures durability and leak-free performance under high temps.
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Low-RPM Shaft: Specifically designed to lower rotational mechanical loss, further boosting overall engine efficiency.
Made In Taiwan