Originally Posted by
Skiddins
Which bit of their mount do you mean?
The motor mount on the 2014 BD7 is very long, starting all the way behind the spur, and bolts across the centre-line of the chassis. To me it looks like it creates quite a bit of stiffness in an area where you want the option of having lots of flex on tarmac. I've not built one myself, so feel free to take this as (un)educated guesswork
You can see the large gap between the layshaft mount and suspension blocks on the Xray:
http://rcnewz.com/wp-content/uploads...-t4-2014-8.jpg
Whereas on the Yok all those bits of alloy are almost touching, limiting the ability of the chassis to flex:
http://2.bp.blogspot.com/-_-ZBupbU9n...77029809_n.jpg
I think the current Xray mount, with the various block/post/screw options gives a wide range of flex settings. I'm certainly finding the T4'14 to work really well in all conditions, especially low grip on old tyres where the Yok struggles.