Description
The NARAKU HD crankshaft does cost a bit more than the Chinese replacement part; but if you have bothered to replace the crankshaft, you probably won't be too happy if you experience a crankshaft failure shortly afterwards because you have gone for an inferior product.
Shape and dimensions are like the original ones, so that you get an excellent replacement part with an increase in durability, perfect for further tuning steps. Comes with pre-installed and pre-pressed crankshaft bearings. Together with the Top Racing crankshaft, this is a favourite of ours, especially considering the price.
Oil pump drive with 16 teeth.
How to change a crankshaft?
The crankshaft is one of the main components of the engine and is responsible for the smooth operation of motorcycle, scooter and moped, whether with two-stroke or four-stroke engine. The longevity of the engine depends not only on the proper condition of the crankshaft, but also on the fact that it is properly mounted.
For a correct installation of the crankshaft, we recommend our tutorial: Crankshaft disassembly and assembly.
How can I tell if my crankshaft is Damaged?
A broken crankshaft causes metallic noises, unusual vibrations, leaking oil seals and drastically reduces the performance of the two-wheeler. In any case, the vehicle must be stopped immediately to prevent the damage from getting worse.
Please note that whenever the crankshaft is changed and serviced, you'll have to install new crankshaft bearings.
Tuning Level: Sport
We categorize our products into different performance levels Original, Sport, Racing and High End , so that our customers can choose the right parts for their setup. It is really important to combine parts that belong to the same tuning level, this is especially true for cylinders, crankshafts and exhausts.
The products listed under Sport yield better performance than Original parts. They may have technical differences, such as the use of higher quality materials, a larger displacement or a performance-enhancing design. They are suitable for everyday use and have a long service life.
Monter avec un kit « 90cc » de la même marque, le montage se fait assez facilement (attention à la clavette d’allumage fournit, mieux vaut en avoir une autre sous le coude). Remplie bien sa fonction mais c’est à mon sens un des seules compromis pour faire rouler un kit 90cc sur la durée.
Après 4 mois d’utilisation intensive (environs 3500km) et d’une conduite toujours à block le vilebrequin a fini par se fendre au niveau de l’allumage, pas étonnant après tout ça, une conduite beaucoup plus souple permettrait de le faire durer dans le temps.
Mais il ne faut pas oublier que le gain de puissance du kit a un impacts sur de toute les pièces du moteur et a la longue vas usé prématurément toutes les pièces du malheureux 139qmb chinois.