Muffin Man
Puppy
- Joined
- Oct 12, 2012
- Messages
- 16
- Reaction score
- 32
- Bike
- BMW R1200GS Adventure
Done 2,5k and really enjoy this bike. Just fitted a throttle tamer and will test it next weekend..
Done 2,5k and really enjoy this bike
I plan to do with it...
- run it in first of course, around here, some on tar dog forbid
- 11 days Transkei/Lesotho/Drakensberg with John Wood in April
- a service at Offroad Cycles in Pretoria (I want to know about the tappets, and am sure Conrad would like to know that also!)
- 12 days Kaokoland with Hardy in May, van Zyls Pass and Marienfluss included, directly followed by
- 10 days Kaokoland with John Wood in June, Robbie's Pass included
Curious to hear how these bearings are holding up. We had numerous failures on ZZ bearings of C&U bearings fitted to new Actom motors recently.No.... but if you zoom in on the cush hub then "C&U" appears - which I just now Googled:
Are C&U bearings any good?
C&U Bearings are used by some of the world's leading manufacturers and service providers in a wide variety of applications. Every C&U Bearing is made to exacting standards to deliver the ultimate in the precision, performance, and quality.
As I've said earlier, I didn't find anything 'chinese' on this bike although quite a bit of the components are made there.
All RS bearings (Rubber Seal) so it's what you would expect in a bike's wheel
ZZ-bearings have metal non-contact seals - which if you ask me is an oxymoron as a non-contact seal MUST leak!
ZZ-bearings have metal non-contact seals (dual plates) - which if you ask me is an oxymoron as a non-contact seal MUST leak!
These bearings are often found on sliding-gate wheels.... and will fail, if not quite soon too.
Here ingress of water, with or course affiliated debris, will dissolve the grease inside and wash this out, in doing so grinding the innards.
This is the reason why I, when I bought mine, have knocked them out and replaced them with 2RS (dual rubber seal) bearings.... which hold up exceptionally well, I've not replaced mine since (which is 8 or more years ago).
Quite frankly I dunno why anyone would use ZZ bearings as 2RS are only marginally more costly.
Their use points to intermittent-use-only or cheap applications, and take heed when you find them.
The Kove's wheels use 2RS bearings (as they should) so I expect a normal lifespan out of them - but I will check next week, and will report here if anything is amiss
(For those not knowing it, both ZZ & 2RS bearings are supplied with socalled LifeTime Grease inside, this is never (it can not!) be renewed)
Just to let all new prospective clients know that @Off Road Cycles carries a lot of these parts and accessories as well and it is available at their shop in PTANot sure if you have seen or heard of Uncle Wang for Kove and MT parts as yet ... by all accounts well priced and rather good service and delivery
https://unclewang.net/search?q=kove+450rally&_pos=2&_psq=kove&_ss=e&_v=1.0
And that retread on the exhaust silencer ?Just to let all new prospective clients know that @Off Road Cycles carries a lot of these parts and accessories as well and it is available at their shop in PTA
Below is the modular type tail rack and pannier rack like the one I have fitted on my bike and it is nice and light
If you look at the pic of @Muffin Man bike further up you will see how lekker the luggage system works
View attachment 919920
View attachment 919921View attachment 919922
Thanks @BuRP for your replies. The efficiency thing @Welsh mentions is the motor suppliers' reasoning for the use of ZZ as well as heat from the 2RS bearings. In practice though I, like @BuRP, toss the ZZ bearings pronto unless there is a really good reason not to.In an electric motor ZZ is ok, in the electric motor any .001% efficiency improvement will be taken.
Thanks @BuRP for your replies. The efficiency thing @Welsh mentions is the motor suppliers' reasoning for the use of ZZ as well as heat from the 2RS bearings. In practice though I, like @BuRP, toss the ZZ bearings pronto unless there is a really good reason not to.
I think the real reason behind the failures we had (8 identical motors all with bearings seized up within 3 months) was zero or insufficient grease from the factory. 2RS bearings with too little grease would not be much better but at least the grease would stay put and dirt can't get in. Anyway, I now buy ABB IP66 motors, they come standard with 2RS bearings and only cost a few bob more.
Glad to hear your C&U 2RS bearings are still good @BuRP .
Those Kove's look really nice. ENJOY! BRAAAP!
They don't come more hardcore than @JonW routes. I think Bart has ridden with Jon in the past.Bart, it is all good and well talking this Chinese bike up, and showing tons of strip-down pictures, but go and RIDE it so we can see if it lasts.
Don't make it so pretty that you stow it in your lounge.
Go test it in the rocks and dongas.
Go with @Noneking and the psychopath riders.
You need to ask the agent as pics are from the demo
ridden with Jon in the past
@Welsh We did use WEG almost exclusively but our local prefered supplier (can also be read as biker buddy) went Actom but after those bearing failures I told him to keep then in future. The ABB motors were sealed much better compared to similarly priced IP66 motors. Will check out WEG again though.Any reason you don't use WEG motors, they used to be quite "robust"?
Enter your email address to join: