robson Posted August 23, 2023 Report Share Posted August 23, 2023 (edited) hi, why GasGas doesn't recommend gear oil with full specs like e.g. 75W90 but they do only 75W ? is that second part doesn't matter or what? I managed to get actually oil with just 75W specs but I got also 75W90 and wonder which one to use Edited August 23, 2023 by robson Quote Link to comment Share on other sites More sharing options...
lemur Posted August 23, 2023 Report Share Posted August 23, 2023 Different types of lubricants use different scales: ... when you see 2 numbers divided by the W that indicates an SAE multi-grade blended oil, like you would need if you were accommodating a wide operating temperature range. 1 Quote Link to comment Share on other sites More sharing options...
robson Posted August 23, 2023 Author Report Share Posted August 23, 2023 so basically I can use either one? 75W90 as well? Quote Link to comment Share on other sites More sharing options...
lemur Posted August 23, 2023 Report Share Posted August 23, 2023 14 minutes ago, robson said: so basically I can use either one? 75W90 as well? Basically, your 75W90 gear oil will be a little thicker at cold temperatures then recommended by the manufacturer. Personally I would be using ISO 46 UDT hydraulic oil because then my clutch won't drag even at cooler operating temps. Quote Link to comment Share on other sites More sharing options...
robson Posted August 23, 2023 Author Report Share Posted August 23, 2023 ok, thanks Quote Link to comment Share on other sites More sharing options...
jonnyc21 Posted August 23, 2023 Report Share Posted August 23, 2023 (edited) 8 hours ago, robson said: so basically I can use either one? 75W90 as well? I like the NILS oils and would consider the clutch trials oil myself if you have a good place to get it. I have used Maxima 75w gear oil in our Gas Gas 125 in the past and it worked well but I did like thinner better myself, however the clutch action is a little faster that way and the 75w slowed the engagement a bit and my daughter liked that a bit better when she was younger and learning. Example: (no affiliation just the only place in the US I know of I can get it)https://abadtrials.com/collections/lubricants-1/products/nils-clutch-trial Edited August 23, 2023 by jonnyc21 Quote Link to comment Share on other sites More sharing options...
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