Batteries for Yamaha 400 YFM400 all models
Which battery does a Yamaha 400 YFM400 all models need?
Specifications and battery: YFM400 all models
Yamaha 400 YFM400 all models takes a 18 Ah, 250 A AGM battery (177 × 88 × 156 mm), with the positive terminal on the right.
Battery for this engine
| Version | Technology | Capacity | Cold cranking (EN) | Size (L×W×H) | Polarity |
|---|---|---|---|---|---|
| Main | AGM | 18 Ah | 250 A | 177 × 88 × 156 mm | + on the right |
This engine shares its battery with the YF40FG Grizzly, YFM40FB Big Bear, YFM40FW Kodiak/Automatic, YFM40FWN Big Bear and 1 more: the compatible batteries are exactly the same.
Data: vehicle specifications and the battery manufacturer's application catalogue.
EFB, AGM or conventional for this engine?
Rule of thumb for the Yamaha 400 YFM400 all models: fit the same technology as the original or better (conventional → EFB → AGM), with equal or higher capacity and cold cranking amps, and respect the size and terminal position of around 18 Ah.
Battery analysis for your Yamaha 400 YFM400 all models
Quick answer You need an AGM battery of 18 Ah. Our recommendation: VARTA YTX20L-BS.
Prices and availability updated on 28/10/2026
Based on the batteries we found for your vehicle, our experts help you pick the right one.
📋 What we found
For your Yamaha 400 YFM400 all models we found 2 compatible AGM or EFB batteries.
📏 Battery size
The list contains batteries in different sizes or capacities (Ah). In many cases both variants fit, but it's worth checking your compartment dimensions and the Ah of your original battery before buying. Choose the one with the same dimensions as your current battery: a bigger one may not fit the compartment or the hold-down. If several match your size, the higher capacity gives more headroom for cold starts.
📊 View AGM vs EFB vs Conventional — full comparison
⭐ Our recommendation
For your Yamaha 400 YFM400 all models it's the recommended battery: VARTA YTX20L-BS. Its specs: AGM technology, 18 Ah capacity, 250 CCA cranking power, 177×88×156 mm dimensions.
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Verified selection
- Class: Quads Batteries
- Brand: Yamaha
- Model: 400
- Engine: YFM400 all models
AGM / EFB batteries
AGM or EFB technology batteries: more charge cycles, faster recovery and a longer life than a conventional battery.
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Motorcycle battery Varta YTX20L-BS (518901026) 12V 18Ah 250A AGM
- 12 V
- 18 Ah
- 250 A
- AGM VARTA 518901025 · 18 Ah · 250 A
Dimensions 177×88×156 mm
- ✓ Varta brand
€53.60
-
Motorcycle battery Varta YTX20L-4 (518909027) 12V 18Ah 270A AGM
- 12 V
- 18 Ah
- 270 A
- AGM VARTA 518909027 · 18 Ah · 270 A
Dimensions 175×87×154 mm
€93.20
Frequently asked questions
- Yamaha 400 YFM400 all models takes a 18 Ah, 250 A AGM battery (177 × 88 × 156 mm), with the positive terminal on the right. We found 2 compatible batteries priced between 53,60€ — 93,20€. Check dimensions and positive terminal position before purchasing.
- Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Yamaha 400 YFM400 all models battery compartment and the positive terminal position matches.
- Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.
- All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.
- Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.
- Motorcycles can use GEL, AGM or conventional batteries. GEL is ideal for occasional use as it holds its charge well. AGM is the best choice for intensive use or high-powered bikes. Always verify the polarity before installing.
- Polarity indicates which side the positive terminal (+) is on. For motorcycles this is critical as some models have the positive on the left and others on the right. Check the label on your current battery or the owner's manual.
- Yes. First disconnect the negative cable (−), then the positive (+). When fitting the new battery, connect the positive (+) first, then the negative (−). Always respect the correct polarity.