ajax Posted November 13, 2016 Report Share Posted November 13, 2016 Hi I am building a 1976 Montesa Cota not a full resto just so it works good so I can ride and ride. My question is the engine has 2 oil fill caps. What oil does it take and how do I check the oil level or drain the old oil. Need to get this right so figured this is the best place to get the correct info. Quote Link to comment Share on other sites More sharing options...
cleanorbust Posted November 13, 2016 Report Share Posted November 13, 2016 (edited) Inner filler cap is for the gearbox, outer one for the clutch. There is a similar plastic drain plug under the engine for the gearbox, the clutch case is drained by removing the flat headed chrome screw on the outside of the casing. I use the following: Clutch: 200cc automatic transmission fluid Gearbox: 300cc 75w gear oil There is no level plug or sighting glass, just fill with quantities above. This info is for the Cota 247, which I have presumed to be the bike you have. Edited November 13, 2016 by cleanorbust Quote Link to comment Share on other sites More sharing options...
kingscorpion Posted November 13, 2016 Report Share Posted November 13, 2016 The drain plug under the gearbox uses to be a 19 mm screw. The original oils were a 10w30 for the clutch (Motul Transoil can be a choice) and a SAE 90 for the gearbox, but you'd better refill with an API GL-4, because API GL-5 will corrode the yellow metal parts in the gearbox. Quote Link to comment Share on other sites More sharing options...
bothfeetdown Posted November 13, 2016 Report Share Posted November 13, 2016 Is that true about API GL-5 as I've just spent a paranoid half hour googling it and apparently it's a bit of myth? I use Morris API GL-5 in my Cota Quote Link to comment Share on other sites More sharing options...
fourex Posted November 14, 2016 Report Share Posted November 14, 2016 Couldn't you use something like the Motul Transoil in both the clutch and gearbox as that's what it does in a modern bike ? Quote Link to comment Share on other sites More sharing options...
ajax Posted November 14, 2016 Author Report Share Posted November 14, 2016 Awesome thanks so much for the info. Almost done just a few pieces to sort out then ride and ride and hopefully a good run before any other repairs. I recon I will have to grin like Malcolm Smith " that was really neat Malcolm " Quote Link to comment Share on other sites More sharing options...
cleanorbust Posted November 14, 2016 Report Share Posted November 14, 2016 Good to know you'll soon be up and running. Any chance of posting a photo or video for our interest? Quote Link to comment Share on other sites More sharing options...
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