ROK GP Gear Oil?

Hello Everyone,
Ive seen a little bit of conversation on here but still not really confident on the route to take. What are all of you using for Gear Oil on the ROK GP specifically. Ive read the manual I see that it calls for an oil everyone is saying is impossible to find. Here is what ive heard so far. I dont want the thickest stuff ever but I dont really care for the very thin stuff either. I run local club stuff and plan to change after every race weekend.

Hi!

The gear oil vortex suggests is indeed impossible to find. When I ran my ROK GP I used motul 10w40 gear oil, it was what everyone at my local track ran and never had any issues. I also used 10w30 gear oil one time as it was the only one I had, but never had an issue. You don’t really have to drain the gear oil very frequently as it stays quite clean, I changed mine about every 2-3 months and never had any issues.

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Thanks for your reply, I believe I will go with the Motul 10w40 gear oil!

I recently got a ROK GP engine, but it doesn’t say anything in the manual about changing gear oil. How often should I replace it, and how do I replace it? Or is it required only for shifters?

I run xeramic kart gear oil in my vort3x engine with no problems !

How often do you change it?

Well we are weekend warriors at club level so once every 3 practice sessions is my timing for change it

It is not impossible to find if you are referring to 75w 90 gear oil, just google it, I use Lucas.
The capacity may vary on whether you have an internal water pump or if it has been removed, and if it is removed then you also have the possibility of having the displacement spacer present or not.

Page 6 in the owner’s manual

Remove the oil filler cap and fill with
30 cc of engine oil, viscosity 40W90
Replace the oil cap and check that the indicator
lamp is fully covered with oil (arrow). If this is
not the case, add more engine oil until
complete coverage of the indicator lamp.