Vibrations and Rear sprocket life

[Jona]

Is the Dakar generally a bit of a vibrator? if you get my drift

I'm noticing it more recently but can't remember what it felt like 4k miles ago when I bought it!!

I'm in need of a new rear tyre but the front still has a bit of life and my pressures are also good.

Could this be the start of head stock bearings

Another quick question I've done about 2500 miles on my new rear sprocket and its now showing quite a bit of wear already probably halfway through its life!. Stupidly I opted for the annodised type that are not that tough anyhow but just wanted your thoughts?



Jona

p.s - I never alligned the rear wheel with a laser so maybe that could be an issue with both the vibrating and sprocket wear ???

 

[shan]

Can not help you with the vibration thing as the one i have vibrates like hell , But then it is diferant than most
But as for the aliening of the rear wheel , shit I raced bikes at 190mph
With home balancing of wheels and that looks about right with the alignment of the rear wheel
Laser what the feck is that about !! come on

 

[Jona]

Can not help you with the vibration thing as the one i have vibrates like hell , But then it is diferant than most
But as for the aliening of the rear wheel , shit I raced bikes at 190mph
With home balancing of wheels and that looks about right with the alignment of the rear wheel
Laser what the feck is that about !! come on

Cheers Shan,

Only mentioned the laser mate as a lot seem to be using them these days


The wear does seem a bit extreme though for 2.5k !?

Maybe the vibration is just the character of the bike

 

[rc mad]

yeah they do vibrate, much less than the other single i had Also depends where your feeling the vibrations? Might be worth giving the engine bolts a once over to make sure nothing is loose, also to check the steering bearings get the front off the deck, you'll know if they are shagged

Sprocket wear, if you think about it the sprockets and chain have to handle repeated 50hp hits, not like a twin or 4 where the power is smoother, I rekon you'll be lucky to see 5k on an ally sprocket on these bikes. I get roughly 10k to a chain / sprocket set and thats with oiling the chain as i see fit

Swap the sprocket for a steely when you do the rear tyre. Should not affect chin life adversly.

 

[Jona]

yeah they do vibrate, much less than the other single i had Also depends where your feeling the vibrations? Might be worth giving the engine bolts a once over to make sure nothing is loose, also to check the steering bearings get the front off the deck, you'll know if they are shagged

Sprocket wear, if you think about it the sprockets and chain have to handle repeated 50hp hits, not like a twin or 4 where the power is smoother, I rekon you'll be lucky to see 5k on an ally sprocket on these bikes. I get roughly 10k to a chain / sprocket set and thats with oiling the chain as i see fit

Swap the sprocket for a steely when you do the rear tyre. Should not affect chin life adversly.

Thanks mate, thankfully the sprockets aren't too pricey so I'll def be swapping it for a steel one when I do the tyres.. Going to put some Tourances on in a few weeks, after I've well and trully squared off the shite Pirelli's

As for the steering bearings there is definitley a notchy point in the centre position I think I may well be doing them at the same time as the tyres and sprocket.... along with some TLC with grease!

 

[rc mad]

If i were you i'd drop the swingarm and check all of the linkage bearings at the same time. Not a massive job, honest

Just refitted the wilbers shock after its service (wallet now £160 lighter, ouch ) and the bottom shock mount was pretty dry.


Typically for bmw there is a special tool for the head bearings, I made one up at work but never used or tested it, you'll also need a 4mm parallel punch ( i think) to remove the old bearings.

 

[Deleted account S A]

Hi Jona, I had the same problem with vibration my triumph tiger , Was advised to check and run my drive chain looser - and it worked - ,
Before you start striping your bike down just make sure you got the chain slack correct, especially as your chewing rear sprockets,
Best way to check is to get someone to sit on the bike and then check there's enough slack,

 

[rc mad]

I forgot about that andy , in fact i bought the chain guide from touratech specifically so that i could run the chain looser than the reccomended 50mm.

I Got a mot warning for a slightly loose chain this year

Also andy, bmw were apparently on a cost cutting exercise when they assembled the f650's, as the grease on the linkages / head bearings is almost non existant. When i checked mine at 6k all of the linkage bearings were bone dry The head bearings went before 12k and they were dry when removed as well