Nope, still cant work out the front suspension
- Thread starter bumpy
- Start date
No matter how many times I stare at it, I still cant figure out how the front suspension doesn't dive when braking.
Can someone explain it in words of one syllable
When the bike dives at the front, the funky front suspension tries to make the front wheel move further away from the back wheel (extending the wheelbase).
When you brake the front wheel is trying to push the front wheel back.... and by pushing it back, it actually pushed the linkage upwards so keeps you level.
To be honest, it does dive but it's not as pronounced as a typical fork bike.
No matter how many times I stare at it, I still cant figure out how the front suspension doesn't dive when braking.
Can someone explain it in words of one syllable
one syllable ? - No
easily ? - I'll try.
its mainly to do with centre of gravity. Think of The CofG as a rock that replaces all of the bike behind the h'bars.
The rock is the sum of all the masses of the motorcycle and is placed at an average point that combines all the parts.
On a BMW twin that rock would be fairly low - say just above the centreline of the cylinders.
The mechanism linkage of the forks is pivoted in such a way that when you apply the brakes the rock try to carry on forwards - but the pivot points direct it upwards around the front wheel spindle.
Simply put - the force of the rock trying to rotate up and forward lifts the whole bike up - counteracting all the other forces going on.
If the BM was a 80's jap bike with a massive engine - then the rock would sit higher up - and the forces would be greater trying to rotate around the wheel downwards.
this is for starters and in very simple terms.
gingercoastie
Guest
By magic 
Fanum
Toubab
Ok, here's the back end.......I'll find the front end in a minute 
<iframe frameborder="1"height="800"scrolling="auto"src="http://www2c.ac-lille.fr/eiffel/cpge/animation37.html"width="900"></iframe>
<iframe frameborder="1"height="800"scrolling="auto"src="http://www2c.ac-lille.fr/eiffel/cpge/animation37.html"width="900"></iframe>
Fanum
Toubab
Hmmm, I know I've seen one similar to the above but about the Telelever rather than paralever...this will start us off though
Fanum
Toubab
Jonny_L
Registered user
NLS
Guest
I know mine does dive. Probably would dive more though in the same given situation without telelever.
lkyphl
Registered user
Mine dives a bit with a softer spring fitted !
Phil
Phil
Deleted account 211025001
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Wildcat
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Hmm ... I managed to come to terms with the concept by postulating that on a conventional set up all "weight transfer" on braking must act through the headstock and into the fork stanchions only, whereas on telelever the frame is connected to both stanchions AND sliders. With weight transfer being resisted by both components, there isn't much differential force left over to compress the suspension. However the suspension is still able to respond to road surface irregularities which are acting only on the sliders.
This may of course be self-delusional bollocks!
This may of course be self-delusional bollocks!
Yes, the weight transfer towards the front wheel still happens just like with conventional forks. The difference with the telelever design is that this doesn't cause the forks to compress (much). So steering geometry is not effected and suspension movement is still available for mopping up the bumps. Only disadvantage is all the increased weight and bulk.
Its not very obvious looking at the bike, but to make this work the forks have to pivot around the headstock. What sort of device lets this happen, is it a rubber mounting?
'Tis a ball joint
