Batteries for KTM 80 80 L Chopper 8 hp (1982-1987)
Which battery does a KTM 80 80 L Chopper need?
Specifications and battery: 80 L Chopper (8 hp)
KTM 80 80 L Chopper (8 hp, 1982-1987): depending on the equipment, it takes a conventional 9 Ah, 85 A battery (136 × 76 × 139 mm) or a 9 Ah, 85 A AGM battery (135 × 75 × 140 mm). Measure your current battery before choosing. In every case the positive terminal is on the left.
- Brand
-
KTM
- Model
- 80
- Built
- 1982 - 1987
- Fuel
- Mixture
- Cylinders
- 1
- Drive
- Chain
Battery for this engine
| Version | Technology | Capacity | Cold cranking (EN) | Size (L×W×H) | Polarity |
|---|---|---|---|---|---|
| Depending on equipment 1 | Conventional | 9 Ah | 85 A | 136 × 76 × 139 mm | + on the left |
| Depending on equipment 2 | AGM | 9 Ah | 85 A | 135 × 75 × 140 mm | + on the left |
This engine shares its battery with the 80 PL (9 hp), 80 RL (8 hp), 80 RLW (8 hp), 80 RS (8 hp) and 1 more: the compatible batteries are exactly the same.
Data: vehicle specifications and the battery manufacturer's application catalogue.
Battery analysis for your KTM 80 80 L Chopper
Quick answer You need an AGM battery of 9 Ah. Our recommendation: EXIDE ETX9C-BS.
Prices and availability updated on 19/10/2026
Based on the batteries we found for your vehicle, our experts help you pick the right one.
📋 What we found
For your KTM 80 80 L Chopper we found 6 compatible batteries. This list includes 2 Start-Stop batteries and 4 conventional batteries (non Start-Stop).
⚡ Battery type for your vehicle
Does your KTM 80 80 L Chopper have a Start-Stop system? It shuts the engine off at short stops (traffic lights, jams) and restarts it automatically when you release the brake/clutch. If your dashboard has an "A-OFF" button or an engine icon with a circular arrow, it has it.
How do I know if my car has Start-Stop?
What happens if I fit a conventional battery in a Start-Stop car?
🔋 Technology (AGM / EFB)
✓ All Start-Stop batteries in the list are AGM — the most advanced technology. Perfect if your current battery was AGM or EFB: AGM always replaces both. Remember to register it via OBD if your car has a BMS (BMW, Audi, VAG, Mercedes…) so the alternator charges it correctly.
📊 View AGM vs EFB vs Conventional — full comparison
⭐ Our recommendation
For your KTM 80 80 L Chopper we recommend the EXIDE ETX9C-BS (AGM, 9 Ah). It also offers the highest capacity (Ah) and the highest cranking power (CCA) on the list — more headroom in cold starts and with many consumers.
- Next-day delivery if you order before 6 PM.
- The best value price among compatible options.
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Verified selection
- Class: Motorcycle Batteries
- Brand: KTM
- Model: 80
- Engine: 80 L Chopper
Start-Stop & high energy demand batteries
AGM or EFB battery for start-stop vehicles and for cars with high energy demand (many electrical consumers, frequent starts). More charge cycles, better charge recovery and longer service life.
Does your car have Start-Stop?
Start-Stop switches the engine off at traffic lights. If your car has it, it needs an AGM or EFB battery.
There are no batteries of that type for this engine. Try "Show all" or message us.
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Motorcycle battery Exide ETX9C-BS 12V 9Ah 120A AGM
- 12 V
- 9 Ah
- 120 A
- AGM EXIDE ETX9C-BS · 9 Ah · 120 A
Dimensions 135×75×140 mm
- ✓ Top capacity
€33.80
-
Motorcycle battery Exide AGM12-9 12V 9Ah 120A AGM
- 12 V
- 9 Ah
- 120 A
- AGM EXIDE AGM12-9 · 9 Ah · 120 A
Dimensions 135×75×140 mm
€47.20
| Category | Make | Reference | Capacity | Cold cranking | Dimensions | Technology | Price | |
|---|---|---|---|---|---|---|---|---|
| Start-Stop & high energy demand batteries | EXIDE | ETX9C-BS | 9 Ah | 120 A | 135×75×140 mm | AGM | €33.80 | More info |
| Start-Stop & high energy demand batteries | EXIDE | AGM12-9 | 9 Ah | 120 A | 135×75×140 mm | AGM | €47.20 | More info |
Conventional Battery
This is a standard or conventional battery for vehicles without a start-stop system
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Motorcycle battery Varta 12N9-4B-1 (509014008) 12V 9Ah 85A
- 12 V
- 9 Ah
- 85 A
Dimensions 136×76×139 mm
- ✓ Varta brand
€110.60
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Motorcycle battery Fulbat FB9-B GEL 12V 9.5Ah 115A GEL
- 12 V
- 9.50 Ah
- 115 A
- GEL FULBAT FB9-B GEL · 9.50 Ah · 115 A
Dimensions 135×75×139 mm
€58.04
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Motorcycle battery Exide EB9-B 12V 9Ah 100A
- 12 V
- 9 Ah
- 100 A
- PLOMO/ACIDO EXIDE EB9-B · 9 Ah · 100 A
Dimensions 135×75×140 mm
€45.40
-
Motorcycle battery Exide 12N9-4B-1 12V 9Ah 85A
- 12 V
- 9 Ah
- 85 A
- PLOMO/ACIDO EXIDE 12N9-4B-1 · 9 Ah · 85 A
Dimensions 135×75×140 mm
€47.50
| Category | Make | Reference | Capacity | Cold cranking | Dimensions | Technology | Price | |
|---|---|---|---|---|---|---|---|---|
| Conventional Battery | VARTA | 509014009 | 9 Ah | 85 A | 136×76×139 mm | — | €110.60 | More info |
| Conventional Battery | FULBAT | FB9-B GEL | 9.50 Ah | 115 A | 135×75×139 mm | GEL | €58.04 | More info |
| Conventional Battery | EXIDE | EB9-B | 9 Ah | 100 A | 135×75×140 mm | PLOMO/ACIDO | €45.40 | More info |
| Conventional Battery | EXIDE | 12N9-4B-1 | 9 Ah | 85 A | 135×75×140 mm | PLOMO/ACIDO | €47.50 | More info |
Frequently asked questions
- KTM 80 80 L Chopper (8 hp, 1982-1987): depending on the equipment, it takes a conventional 9 Ah, 85 A battery (136 × 76 × 139 mm) or a 9 Ah, 85 A AGM battery (135 × 75 × 140 mm). Measure your current battery before choosing. In every case the positive terminal is on the left. We found 6 compatible batteries priced between 33,80€ — 110,60€. 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 KTM 80 80 L Chopper battery compartment and the positive terminal position matches.
- Yes, we detected Start-Stop compatible batteries for your KTM 80 80 L Chopper. If your vehicle has Start-Stop, it needs an AGM or EFB battery. An AGM must always be replaced with AGM. An EFB can be replaced with EFB or AGM. Never install a conventional battery in a Start-Stop vehicle.
- 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.
- ⚠ Then you need a battery designed for Start-Stop (EFB or AGM). We have hidden the conventional batteries from the list: fitting them in your car would ruin the battery within months and could damage the alternator. The batteries below are built for the frequent charge/discharge cycles of Start-Stop. 💡 Great. You can buy either a conventional or a Start-Stop (EFB or AGM) battery: a Start-Stop battery is perfectly valid in a non-Start-Stop car and is actually more robust (longer life, better cold-start performance). It is just a bit pricier. On vehicles older than year 2000, an EFB is preferable to an AGM: legacy alternators charge at a fixed voltage without temperature compensation, and an AGM needs a more precise charging profile to avoid losing life quickly — an EFB tolerates the classic alternator profile better. 💡 If in doubt, play it safe: buy a Start-Stop battery (EFB or AGM). It works in Start-Stop cars and non-Start-Stop cars alike, lasts longer and avoids any risk. You only pay a few euros more than a conventional one.