How to: fit a BMW s1000rr rear shock to a VFR 400 nc30

[Drunkn Munky]

Thats good to hear i wasnt keen on switching to a nitron. So the HRC linkage that rick is selling, is that for a 17" or 18" rear wheel? I noticed the F3 parts manual shows a linkage for each.

And where would i start for spring weighst for a 12 stone rider inc kit?

[Yakama]

Tony the hrc manual specifies suggested spring rates

[999Gomerz]

Thats good to hear i wasnt keen on switching to a nitron. So the HRC linkage that rick is selling, is that for a 17" or 18" rear wheel? I noticed the F3 parts manual shows a linkage for each.

And where would i start for spring weighst for a 12 stone rider inc kit?

I am not sure whic link Risk is selling , but I got mine from him an it works well.

I would use an adjustable pull arm as this way you can fine tune the wheel rate curve and also ride height/swing arm angle due to the silly single sided swing arm idea.....

If you weigh 76 kg with gear then I would use an 8.5-9.5 Kg spring. Which means you could probably bolt a GSXR or BMW shock straight in and the spring that was on the shock would be close, the valving would be too.

So your only outlay would be for the HRC link and then an adjustable pull arm.

[Drunkn Munky]

When you say pull arm, you mean the link on the left of this picture yes?

HRC Linkage.jpg

Im using a ohlins shock which i belive originated from a early blade as its still fitted with a spring way to soft for a NC but the top and bottom mounts have been changed to fit a NC. So by using the HRC linkage i can keep the softer spring and then theres no need to have the shock revalved? IIRC the shock is adjustable from 305-315mm, so if i set it to 310mm id need a pull arm length of 127-134mm?

Ive seen a couple of those adjustable pull arms but they were made up from rose joints and didnt look that strudy to be honest. have you any pics of your setup?

[999Gomerz]

The thing on the left is called a pull arm, the thing on the right is the link.

My adjustable pullarm does use rose joints, there is no lateral force on the pull arm so rose joins are fine.

But if you dont want to use one, use the whole HRC linkage that Rick sells and set your shock to 308 as a start, put your ecentric between 3 O'Clock and 6 O'Clock. and shortnen the shock if your bottom chain drags on the exhaust or top chain on the front of swingarm.

What is the code on the ohlins spring?

[lukemillar]

When you say pull arm, you mean the link on the left of this picture yes?

Most people would call those dogbone(s)

[999Gomerz]

Most people would call those dogbone(s)

No mate, most people including HRC call them "pull arms" or "Connecting Rod Assy".

Because when the suspension is compressed that rod is pulled, the shock is compressed, and the linkage rocks.

[Tim400GB]

lukemillar is correct. The term 'dogbones' is a widely accepted term in the UK for the pullarm.

[porndoguk]

lukemillar is correct. The term 'dogbones' is a widely accepted term in the UK for the pullarm.

+1,

honda list the item you call a link as a cushion arm (ASSY), and the dogbone as a Cushion connecting rod (ASSY).

http://www.akhara.com/nc30/nc30parts/files/42.htm

[Drunkn Munky]

The thing on the left is called a pull arm, the thing on the right is the link.

My adjustable pullarm does use rose joints, there is no lateral force on the pull arm so rose joins are fine.

But if you dont want to use one, use the whole HRC linkage that Rick sells and set your shock to 308 as a start, put your ecentric between 3 O'Clock and 6 O'Clock. and shortnen the shock if your bottom chain drags on the exhaust or top chain on the front of swingarm.

What is the code on the ohlins spring?

Thanks i didnt know the pull arm was part of ricks HRC kit i just assumed that was just a stock link. What length is the pull arm that rick makes then?

I'll pull the shock out and check lengths and spring weights later.