2019 Speed Triple Rake & Trail - Why Is This Stable?

Sorry I don’t know what you’re talking about so I googled it
Came up with these

 

It's not so much the rake, as where the geometry of the turning point and the contact patch of the front wheel lands.
If these are in the wrong position to each other ( which can be caused by rake) then you have instability.

 

Rake is only part of the story. Wheel size affects trail as does axle placement relative to the steering axis ......before you include fork length. Bedtime reading:
https://en.m.wikipedia.org/wiki/Bicycle_and_motorcycle_geometry

 

Lol "He's wearing a fuckin cardigan"

 

..........hence the bedtime reading........with pictures!

 

In one word, caster

 

Also undermoose how about figures for front and rear weight loading?

I think you are trying to (initially) isolate one aspect (rake) of motorcycle geometry when ultimately other factors and compromises have to be made.
It's a bit like car steering, castor, KPI, camber, offsets, corner weights, engine position, front/rear/four wheel drive all have to be taken into account. Then of course you have tout and turns to consider!!!!

I think you get the idea.

 

Caster is trail and just like a caster on a chair the faster you accelerate it the more it wobbles, the Speed twin handles so nicely because it's on the edge and does not have enough power to make it shake it will shake a little if you are small like me but it amounts to nothing where as my old 1000 K5 Gixxer will rip my arms off with its 187 BHP.

 

It's about creating a balance and best compromise...... winging it would most unlikely give a good result.

 

Re-reading that i could have worded it better.....

Winging it really wouldn't work when discussing geometry as what you gain in one area you lose elsewhere. Think about older bikes and there really were some monsters in terms of handling. Also the intended use is vast from track days to touring. I suppose it all comes down to sales quantities and so it has to suit the 95th percentile man etc.