Batteries for MZ RT RT 125 Classic 15 hp
Which battery does a MZ RT RT 125 Classic need?
Specifications and battery: RT 125 Classic (15 hp)
MZ RT RT 125 Classic (15 hp) takes a conventional 9 Ah, 130 A battery (135 × 75 × 139 mm), with the positive terminal on the right.
Battery for this engine
| Version | Technology | Capacity | Cold cranking (EN) | Size (L×W×H) | Polarity |
|---|---|---|---|---|---|
| Main | Conventional | 9 Ah | 130 A | 135 × 75 × 139 mm | + on the right |
This engine shares its battery with the RT 125 (15 hp), RT 125 SM (15 hp), RT 125 SM Blizzard (15 hp), RT 125 SM Cup Replica (15 hp) and 7 more: the compatible batteries are exactly the same.
Data: vehicle specifications and the battery manufacturer's application catalogue.
Battery analysis for your MZ RT RT 125 Classic
Quick answer You need an ordinary lead-acid battery of 9 Ah. Our recommendation: VARTA YB9L-A2.
Prices and availability updated on 26/10/2026
Based on the batteries we found for your vehicle, our experts help you pick the right one.
📋 What we found
For your MZ RT RT 125 Classic we found 3 compatible conventional batteries.
📊 View AGM vs EFB vs Conventional — full comparison
⭐ Our recommendation
For your MZ RT RT 125 Classic we recommend the VARTA YB9L-A2 (ordinary lead-acid, 9 Ah). It also delivers the most cranking power (CCA) on the list — a clear edge in cold starts. Varta is the world's leading manufacturer of starter batteries and supplies first-equipment (OEM) batteries to the major European car makers.
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Verified selection
- Class: Motorcycle Batteries
- Brand: MZ
- Model: RT
- Engine: RT 125 Classic
Conventional batteries
Standard lead-acid batteries.
-
Motorcycle battery Varta YB9L-A2 (509016008) 12V 9Ah 130A
- 12 V
- 9 Ah
- 130 A
Dimensions 135×75×139 mm
- ✓ Varta brand
€117.30
-
Motorcycle battery Exide 12N9-3B 12V 9Ah 85A
- 12 V
- 9 Ah
- 85 A
- Conventional EXIDE 12N9-3B · 9 Ah · 85 A
Dimensions 135×75×140 mm
€47.50
-
Motorcycle battery Varta 12N9-3B (509015008) 12V 9Ah 85A
- 12 V
- 9 Ah
- 85 A
- Conventional VARTA 509015009 · 9 Ah · 85 A
Dimensions 136×76×140 mm
€112.40
| Category | Make | Reference | Capacity | Cold cranking | Dimensions | Technology | Price | |
|---|---|---|---|---|---|---|---|---|
| Conventional batteries | VARTA | 509016013 | 9 Ah | 130 A | 135×75×139 mm | Conventional | €117.30 | More info |
| Conventional batteries | EXIDE | 12N9-3B | 9 Ah | 85 A | 135×75×140 mm | Conventional | €47.50 | More info |
| Conventional batteries | VARTA | 509015009 | 9 Ah | 85 A | 136×76×140 mm | Conventional | €112.40 | More info |
Frequently asked questions
- MZ RT RT 125 Classic (15 hp) takes a conventional 9 Ah, 130 A battery (135 × 75 × 139 mm), with the positive terminal on the right. We found 3 compatible batteries priced between 47,50€ — 117,30€. 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 MZ RT RT 125 Classic battery compartment and the positive terminal position matches.
- Motorcycles can use GEL, AGM, or conventional batteries. GEL batteries are ideal for occasional use. AGM batteries are the best option for heavy use or high-power motorcycles. Always check the polarity before installation.
- Polarity indicates which side has the positive (+) terminal. This is critical for motorcycles because some models have the positive terminal on the left and others on the right. Check the label on your current battery or the manufacturer's manual.
- Yes. First disconnect the negative (−) wire and then the positive (+) wire. When installing the new one, connect the positive (+) wire first and then the negative (−) wire. Always respect the correct polarity.
- 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.