eBay kit burning oil :( good quality replacement i  By  kyle401 (Read 393 times)

My velocity 50cc has about 15,500 kilometers and I have used an ebay 50mm kit since 8,000 kilometers and now the kit is failing me. I would also like to replace the crank when I put in a new kit. I was wondering which would be the best quality and best lasting of both. I would like to install a performance crank such as a naraku racing crank because it has needle bearings this less wear and better reliability and I was wondering wear to get this also wear to get a high quality 50mm bbk and cylinder head. Thanks in advance , Kyle