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How about we call the one by the motor that contains the gears "Transmission" and the one at the rear wheel that changes the direction of the power "Differential".
I would drain the 1000 ml you put in and only put back in the big half of it , Now that ya know how there ain't nothing to it !
...For the bloke who put in 600ml 'Just Because' at least 100ml of that will shortly be decorating the outside of the bike. Drain 100ml out.
LorengoHow about we call the one by the motor that contains the gears "Transmission" and the one at the rear wheel that changes the direction of the power "Differential" . Look on page 204 of the book that came with the bike . It calls both of them transmissions ??? 1cc = 1ml FYII would drain the 1000 ml you put in and only put back in the big half of it , Now that ya know how there ain't nothing to it !
A motorbike is a single track vehicle, it doesn't have a differential because there is no second track to differentiate against!
Is it necessary to get a Service Manual ?
Given the gearbox is pressure fed I'd stick with the factory recommended weight.
makes sense ! I'll drain it tomorrow and only put back 450 of it . I can picture all that thick oil churning up and gurgling around inside the gearbox ---- seems like strait 50W might be better but I've got a 2 year guarantee to keep up so what it calls for will be what it gets . Is it necessary to get a Service Manual ?
Straight 50W would be AWFUL for that gearbox. You need a lubricant designed for use on the kind of gears that are in the gearbox, and what is spec'ed is what you need. You can use a slightly broader range lube, such as Mobil1 75w90 in the gearbox, but don't use anything that isn't a true gear oil.
You don't fill it to the top of the hole, but to the threads at the bottom. Marvelously and strangely, I'd bet that results in between 450-500 ml/cc being installed - depending on how thorough your draining was (and it never is as much as you think).
A service manual is always good even if you don't do your own servicing - it helps you understand what the tech/mechanic is saying.
Motoul makes a very good 75w-90, which is specified.$24 a liter from dealer, but that is enough for two changes.
Maybe I misunderstood comment, but there is no level port, as on the transmission (rear hub) on a V7 II.Specified fluid is added and no way to check level.See manual pages 53 and 54, previously posted.
We are in violent agreement.My Breva 750 (still not so different in this, other than fluid capacities), was specified with 80w90 in the gearbox (for straight-cut gears) and 85w140 in the final drive (for bevel-cut gears). Motul makes fine products and there's nothing wrong with using that - but it is not always readily available.
I haven't looked at a V7II recently, but I though it still had the main plug (allen hex) on the side of the gearbox where you both fill it and check level (by filling it till it starts to run over the threads, if the bike is level). If so, that's what I was talking about. If they designed this out, that is certainly a disservice to owners.The design with a breather (top), drain (bottom), and fill (side) has worked very well for Guzzis for decades...