Skip to content
Scooter
50cc Bike
Moped
Motocross
nk10012_nk10012.jpg
Naraku
Article no.: NK100.12

Naraku Cylinder Head 85cc GY6 / 139QMA / 139QMB / Rex RS450 4-stroke

Sorry, this Item has been Discontinued

This product is no longer being manufactured, so unfortunately we can no longer offer it.

However, we would like to help you find an alternative. Please take a look at other products within the same category or contact us so we can help you with selecting the right product.

Description

Replacement cylinder head incl. valves for NARAKU 51mm cylinder kit.
Questions about the product
 
 
Notes and Safety

Cylinder head

The cylinder head of an internal combustion engine can have different shapes and contain different elements, depending on the type of engine. While in a two-stroke engine the cylinder head contains only the spark plug, in a four-stroke engine it is much more complex, as it also contains the valves, the camshaft and many other parts that are important for the operation of a 4-stroke engine.

However, these two points apply to any cylinder head:

  • it must be tight
  • it controls compression

Different types of cylinder heads

Each cylinder head is specifically designed for a specific cylinder. You must therefore always make sure that the cylinder head fits the cylinder.

Cooling :

The cylinder head is also partially responsible for cooling the engine. In air-cooled engines it has fins on the outside and in liquid-cooled engines there is chamber for the circulating coolant.

One-piece or two-piece 2-stroke cylinder head

One-piece cylinder heads are the most common, but modular two-piece cylinder heads are also available for 2-stroke engines. The principle is quite simple: the water jacket allows water circulation, while the combustion chamber insert closes off the combustion chamber. The cylinder head can be replaced and modified to achieve different compression ratios and thus different engine behavior.

4-stroke cylinder head

Tuning cylinder heads can also be found for four-stroke engines. Although components optimized for motocross are seldom found on the market (usually they are original components that have been reconditioned to increase performance), there are also racing cylinder heads for scooters and motorcycles. These often have optimized intake and exhaust ports and sometimes even seats for larger valves.

Technical details
Naraku Cylinder Head 85cc GY6 / 139QMA / 139QMB / Rex RS450 4-stroke
Article no.NK100.12
Weight1,10 kg
BrandNaraku
Product typeCylinder head
HomologationECE Homologation
StrokeOriginal
Conrod lengthStandard
Compatible vehicles for this article
Customer reviews
Be the first to review this product!
Write a review
Shopping cart

JavaScript ist in Ihrem Browser deaktiviert.
Bitte aktivieren Sie JavaScript um unseren Webshop nutzen zu können und laden diese Seite erneut.

Back to top
Categories
Products