STARK
Why the first 5 hours are different
It is easy to look at a new VARG, see no leaks or warning signs and assume the transmission oil can wait. The first change has a specific purpose, however: it closes the running-in phase before you move into the normal service cycle.
Inside the transmission, the working faces of the mating gears are establishing their contact pattern. That process can release very fine metallic particles into the oil. This is normal running-in contamination, not a suggestion that you should find visible fragments or evidence of damage. Removing the original oil stops those fine particles from circulating through many more hours of riding.
Treat 5 hours as a firm service point
Stark schedules the first transmission oil change after 5 riding hours. Doing it on time gives the gears and bearings a clean lubricant charge once the initial bedding process is complete. It is a small job at a point when it has the greatest practical value.
After that first service, the next gear-oil change is due at 40 riding hours or 12 months, whichever comes first. Do not wait for that interval if the bike has seen heavy use or there are signs of water ingress, unusual noise or a leak; those conditions call for an earlier inspection.
Use the specified SAE 75W-90 oil
The owner’s manual specifies SAE 75W-90 gear oil. Follow that specification rather than transferring oil habits from a combustion motorcycle. You should also check the manual edition for your exact model and year before carrying out the service.
Bajamoto offers two suitable 75W-90 oils. The product links direct you to the correct country store, where current pricing and availability are shown.
Make the next service difficult to miss
Gilbert rides both the VARG MX 1.2 and VARG EX and has covered 200 hours across two Stark motorcycles, from training sessions to enduro competition in varied conditions. His approach is straightforward: the 5-hour change is not paperwork. It marks the end of running-in and begins normal use with fresh oil.
Record the riding hours as soon as the change is complete, then set the next date from the official schedule. That simple habit keeps servicing predictable through mud, dust, heat and consecutive race weekends—and removes the guesswork when riding hours build quickly.
