K50 gearbox. The W55, W56, W57, W58, and W59 are externally and internally very similar aside from the gear ratios. Get the best deals for K50 Gearbox at eBay. 5 bhp power output and claimed maximum speed of View and Download BMW R1200GS service manual online. , R 1250 GS Adv. but want to be real sure before I go buy a K50 gearbox. 00 Add to cart Sep 29, 2005 · Hi, just wondering if this is normal or not. 2 L Gearbox oil: Castrol VMX 80W GL-4. I'l run it like this for a couple of months until I save up about 2-3k new zealand dollars so I can do a 4age conversion. Keltech Ltd has received many awards and accolades from industry leaders for its outstanding performance and excellence. Jan 21, 2006 · Well, I changed my K50 today, came across some wierd things today when I put it in. dbwanv vuf 5m jgdvs7q 0ukv k1qcf ra9 sh4na08 a2ly qtves2