Naraku
Description
Keep your Naraku 52.4mm Big Bore Kit sealed and running at full compression with this direct-replacement gasket set. Engineered specifically for the Naraku 89cc cylinder kit on QMB139 (1P39QMB) engines, it includes all three top-end gaskets needed for a cylinder service or rebuild. High-temperature composite and metal construction for reliable sealing under performance conditions.
This set is NOT compatible with stock 39mm (50cc) or 47mm (72cc/80cc) cylinders — verify your bore diameter before ordering.
This product is intended for off-road use only. This product is not intended for use on public roads or land.
Features
- 3-piece gasket set engineered for Naraku 52.4mm 89cc big bore cylinder kits
- Includes head gasket (52.4mm bore), base gasket, and tensioner gasket
- High-temperature composite gaskets with metal head gasket ring
- Direct replacement for Naraku BBK top-end service on QMB139 engines
- Note: Packaging and non-metal gaskets may vary in appearance from product photo
Specifications
- Bore size: 52.4mm (89cc displacement)
- Engine platform: QMB139 / 1P39QMB (GY6 50cc 4-stroke)
- Pieces: 3 (head gasket, base gasket, tensioner gasket)
- Material: High-temperature composite + metal head gasket
- Part number: NX100.58
- Brand: Naraku
Compatibility
| Make | Model | Notes |
|---|---|---|
| Generic / Chinese | QMB139 (GY50) 50cc — any brand | Must be equipped with Naraku 52.4mm BBK |
| Tao Motor / TaoTao | ATM50-A1 (Pony 50), Speedy 50, VIP Future Champion | Most common QMB139 platform for 89cc upgrades |
| Wolf Brand | RX-50, Islander 50, Blaze 50 | Standard QMB139 architecture |
| Ice Bear / Amigo | Rocket, Q6, Rocky, J-50 | 50cc short-case or long-case QMB139 engines |
| Honda | Metropolitan (2013+) | Only models converted to QMB139-style BBK |
| Kymco | Agility 50, People 50 | Compatible with 52.4mm engine conversions only |
Product Diagrams
Features
Specifications
Bore: 52.4mm | Displacement: 89cc | Engine: QMB139 / 1P39QMB (GY6 50cc 4T) | Pieces: 4 | Includes: Head gasket, base gasket, tensioner gasket, exhaust gasket | Material: High-temp composite + metal head gasket | Part No: NX100.58
Model Fitments
| Make | Model | Notes |
|---|---|---|
| Generic / Chinese | QMB139 (GY50) 50cc | Must be equipped with Naraku 52.4mm BBK |
| Tao Motor / TaoTao | ATM50-A1, Speedy 50, VIP Future Champion | Most common QMB139 platform |
| Wolf Brand | RX-50, Islander 50, Blaze 50 | Standard QMB139 architecture |
| Ice Bear / Amigo | Rocket, Q6, Rocky, J-50 | 50cc QMB139 engines |
| Honda | Metropolitan (2013+) | QMB139-style BBK conversions only |
| Kymco | Agility 50, People 50 | 52.4mm engine conversions only |
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
