mudyman Posted June 4, 2023 Report Share Posted June 4, 2023 Hi Guys (+ Gals ), can anyone say if the bikes of this age had mineral oil @ the day and if it is still to recommend. The problem with neu oil types are that they seem to make trouble with seals. especialy the SWM has problems with oil leaks and needs new seals for the kicker and gear shaft at regular intervals. Quote Link to comment Share on other sites More sharing options...
b40rt Posted June 4, 2023 Report Share Posted June 4, 2023 (edited) No noticeable issues with atf, have you changed the o ring on the other end of the gear shaft ? Edited June 4, 2023 by b40rt Quote Link to comment Share on other sites More sharing options...
mudyman Posted June 5, 2023 Author Report Share Posted June 5, 2023 No I haven´t 😞 I have 2 or 3 bikes that have needed the O-ring changing with regular frequency. Can you get to the one on the other end without splitting the cases? Quote Link to comment Share on other sites More sharing options...
b40rt Posted June 6, 2023 Report Share Posted June 6, 2023 16 hours ago, mudyman said: No I haven´t 😞 I have 2 or 3 bikes that have needed the O-ring changing with regular frequency. Can you get to the one on the other end without splitting the cases? Nope 😭 Quote Link to comment Share on other sites More sharing options...
mudyman Posted June 14, 2023 Author Report Share Posted June 14, 2023 Thanks Ross 1 Quote Link to comment Share on other sites More sharing options...
dozerash Posted August 18, 2023 Report Share Posted August 18, 2023 I use Belray 80wt Gearsaver, works great and have been using it for about 5 years in my 1980 SWM TL320. I had a small leak at shifter/Kickstarter shaft and doubled the O rings. Haven’t had a leak in a couple of years now! 1 Quote Link to comment Share on other sites More sharing options...
lemur Posted August 18, 2023 Report Share Posted August 18, 2023 For wet clutch and transmissions I use the same thing I use in my Kubota tractor or excavator transmission & hydraulics. Works out to around 8$ per litre or less then half the cost of motorcycle lubricants so I can change it more frequently and that's the ticket to better clutch performance, you need to keep the dirt and water out. To the question of mineral oil, yes it's been around almost forever, Norton brand honing or sharpening stone oil is a very thin, food safe, pure mineral oil and works great in a clutch hydraulic master cylinders as well as for lubricating cables and mechanical parts where a thin oil is called for. Been using both types of oil successfully in all brands and types of motorcycles for decades. Quote Link to comment Share on other sites More sharing options...
iconic558 Posted October 20, 2023 Report Share Posted October 20, 2023 ATF as B40, worked fine on mine. Any clutch drag, whip out the metal plates, rough up with 80 grit and enjoy. Quote Link to comment Share on other sites More sharing options...
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