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Post by multistrada1 on Sept 21, 2021 17:26:35 GMT -5
I was wondering if anyone uses anything other than the GTX 20w50?
I used 75w80 and 75w140 wet clutch oils in my GT750 back in the day and it shifted better, plus the oil would not look
used up after 1000 miles like the 20w50.
I'm figuring there must be better gear/wet clutch lubricants other than what was used in the day.
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Post by wayne on Sept 21, 2021 18:02:39 GMT -5
Yes. In the "which oil" thread on FAQ we talk about using alternative gearbox oils and specifically recommend not using GTX20-50 (as per US Castrol guidelines). Belray straight 80W gear oil helps a lot of people with starter clutch issues but fine to run regardless.
There's a myriad of suitable oils out there for motorcycle gearboxes. From garden variety Castrol, Mobil to just about anything on the shelf. Manual recommended 20-40W for the transmission but you can work around that a little.
I personally haven't used a straight gear oil. I run Castrol or Mobil 4T, no problems but not manna from heaven either.
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Post by timpa136 on Sept 22, 2021 8:40:13 GMT -5
I used 75w80 and 75w140 wet clutch oils in my GT750 back in the day and it shifted better, plus the oil would not look used up after 1000 miles like the 20w50. One benefit of the RE5 is the separate trans. oil. 75W gear oil is a great choice. INHO. Use what you liked in your GT. I mix a cocktail on seasonal temperatures changes. Tim |
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Post by timpa136 on Sept 22, 2021 8:45:36 GMT -5
Yes. In the "which oil" thread on FAQ we talk about using alternative gearbox oils and specifically recommend not using GTX20-50 (as per US Castrol guidelines). Belray straight 80W gear oil helps a lot of people with starter clutch issues but fine to run regardless. I personally haven't used a straight gear oil. I run Castrol or Mobil 4T, no problems but not manna from heaven either. Curious,what oils are the Castrol and the Mobil 4T? Tim |
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Post by multistrada1 on Sept 22, 2021 14:41:35 GMT -5
I spoke to an engineer at Golden Spectro and he recommended the Spectro 80w gear oil, it replaces 20w50 and has additives for the clutch.
I prefer to use whale blubber but that stuff is so hard to find, need to smuggle it in from China.
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Post by wayne on Sept 22, 2021 18:22:18 GMT -5
Haha, China wouldn't be sending us anything these days in AU, smuggled or not.
Let us know how the spectro goes.
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Post by wayne on Sept 22, 2021 18:28:07 GMT -5
Curious,what oils are the Castrol and the Mobil 4T? Tim A general four stroke oil, semi synthetic:   I use the cheaper mineral in a 15-50. Generally higher temps in AU so I'm not worried about the higher than recommended weight and so far (15 years) no issues:  |
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