KR-1S.co.uk Forum

As most of you know, I've probably tried more swing arms than god knows what

Anyway, the thing that stops most fitments is the fact that on the KR the shock lies on a bit of a slope compared with some others and the spring tends to clout the swingarm. So I've come up with this



The basic idea is to push the shock backwards to stand more upright and also as I'm going to be using an r6 shock to compensate for the slightly extra length so I can use std KR dogbones and wheel etc.

Bare in mind it's the prototype and it still needs the end bits machining round (plus a bit machining out of the centre section for clearance on the actual shock.)

But fit is spot on and it bolts up solid using the original shock mounting bolt.

This should then allow zxr250, szr660, tzr1254dl/hw swingers to go in without any clearance problems on the spring. They all have the advantage that the bottom shock mounts are very close to the kr and only need a couple of spacers making.

This is how it looks fitted



Could also help with just mounting an r6 shock, save on new dogbones and having to mess with altering the bush as I could get them made to fit the original Yam bush.

No I've no idea if this is going to work, I'll keep you posted To be honest if I get anymore done I think I might get the top extended a bit so it could be drilled and the frame tapped so it would be even more solid.
Code has been done for it so should be able to churn them out if needed.

it's always the simple things that impress

be interesting to see how that works out mark

I like the idea =D>

but there might be one problem : forces on the transverse support between both frame-bars will be higher (+/- doubled looking at it) because off the extra length.

when running it the first times, I'd check it regularly to make sure your not about experincing something that would make a good laugh on youtube

I will be interested to hear how you get on with this.
I also considered this option whn I fitted the barced RGV swing arm, because I found out that the R6 resevoir clouted the bracing on full compression.
I talked over the idea of an extension with my machinist, but, like Jan, we also considered that the twisting forces about the fixed mount would be much higher than standard.
In the end, I had a u section cut out of the swingarm and re-welded with a thick alloy plate.
As you said, making the shock mounting position much higher would make fitting an alternative rear shock much easier (for choice)

I agree with your comments, when it's all in place I'm going to get a strengthening bar welded in across to the two main spars so it returns to normal if you know what I mean