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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £7.99 | 3 to 5 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £7.99 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £7.99 | 7 to 10 working days |
Larger-displacement motorcycles demand a battery capable of sustaining repeated high-drain starts without compromising reserve capacity. The Numax YG51913 is a sealed 12V 21Ah gel motorcycle battery rated at 300 CCA (EN), engineered to meet that requirement across a wide range of twin and multi-cylinder machines. Its gel electrolyte construction eliminates free acid, removes the need for maintenance checks, and permits fitment in orientations not suited to conventional flooded cells.
Numax draws on volume manufacturing expertise to deliver gel technology at an accessible price point. The immobilised gel electrolyte reduces the risk of stratification and plate corrosion over extended standing periods, making this battery well suited to seasonal and intermittent use as well as year-round commuting.
The YG51913 measures 183 mm 79 mm 171 mm (L W H) and is supplied factory sealed, ready for installation without acid preparation. Terminal layout is Type 2 with standard polarity (positive left, code 0), and hold-down configuration is B00. It is a direct replacement cross-referenced against OE code 51913. Riders should confirm fitment against their vehicle handbook or manufacturer battery specification before ordering." No colour or capacity variants are currently listed for this SKU. The similar liquid-electrolyte alternative LYG51913 is available separately for applications where gel chemistry is not specified. The YG51913 is covered by a 1 Year Warranty against manufacturing defect. "Standard delivery: 13 working days within UK mainland. 30-day returns.
NUMAX motorcycle batteries offer great performance at a budget price. The range is vast covering almost every size of bike battery ever made. Each NUMAX motorcycle battery comes complete, either with an acid pack or factory sealed.
Key Feature:optimised for motorcycles and two-wheelers, ensuring consistent ignition power, rapid recharge capability, and stable energy supply for compact high-performance engines and accessory systems.
Uses:PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specialising in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalogue of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
Fitment Warning:You must check your current battery against the specifications of this battery before ordering to ensure that this is the correct battery for your vehicle. Check battery technology, dimensions, terminal type, polarity, capacity (AH) and cranking performance (CCA). We cannot guarantee correct fitment under any circumstances.
| Brand | Numax Batteries |
|---|---|
| Voltage | 12V |
| Capacity AH (C20) | 21Ah |
| Cold Cranking Amps (EN) | 300A |
| L × W × H | 183mm × 79mm × 171mm |
| Warranty period | 1 Year |
| Weight (Kg) | 6.11 |
| Capacity AH (C5) | |
| Capacity AH (C10) | |
| Capacity AH (C100) | |
| Marine Cranking Amps (MCA) | |
| Watt-Hours (WH) | |
| Length (mm) | 183 |
| Width (mm) | 79 |
| Height Inc. Terminal (mm) | 171 |
| Terminal Placement | 0 |
| Terminal Type | 2 |
| Hold Down | B00 |
| Case Size | |
| ETN Number | |
| TTNR |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Expert Guidelines for Preserving Your Heavy Equipment Battery Heavy machinery, including forklifts, bulldozers, and excavators, relies on robust batteries to minimize downtime and maximize operational availability. These batteries must endure even more challenging conditions than typical automotive batteries. Moreover,...
Standard Delivery: £7.99
Delivery Estimate: 3 to 5 working days
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A. The YG51913 is a 12V battery with a rated capacity of 21Ah (C20) and a Cold Cranking Amp (CCA EN) rating of 300A.
A. The YG51913 uses gel electrolyte technology. The electrolyte is immobilised within a silica gel matrix, making the battery sealed, spill-proof, and maintenance-free.
A. The battery measures 183 mm in length, 79 mm in width, and 171 mm in height including terminals. It weighs 6.11 kg.
A. The YG51913 uses a Type 2 terminal configuration with standard polarity (code 0, positive terminal on the left). The hold-down type is B00.
A. The YG51913 is cross-referenced against OE code 51913. Always verify fitment against your vehicle manufacturer's battery specification before purchasing.
A. The YG51913 is supplied factory sealed and requires no acid preparation. It is ready for installation directly from the packaging.
A. Start-stop compatibility has not been confirmed for this product. Please refer to the product label and your vehicle's specification to determine suitability.
A. No colour or capacity variants are currently listed for the YG51913 SKU. A similar alternative, the LYG51913 (liquid electrolyte), is available separately.
A. The YG51913 is covered by a 1 Year Warranty against manufacturing defects from the date of purchase.
A. The YG51913 is dispatched via standard parcel. Standard delivery takes 13 working days within UK mainland. A 30-day returns policy applies.
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