Page 7 of 19
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Thu Dec 13, 2012 9:51 am
by bikemonkey
Drunkn Munky wrote: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?
That HRC linkage looks rather nice
EDIT: damn why won't the picture show?
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Thu Dec 13, 2012 3:04 pm
by Drunkn Munky
999Gomerz wrote: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?
The code on the spring is 1393-41/11.5 which im guessing is 11.5kg then?
And the shock extends from 305mm to 320mm
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Thu Dec 13, 2012 8:22 pm
by lukemillar
999Gomerz wrote:lukemillar wrote: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.
Calm down. I'm just saying that is how they are known in the UK. If you search for "pull arm" you'll find squat.
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Thu Dec 13, 2012 10:04 pm
by 999Gomerz
Luke Millar: I just re-read my post and I sounded like a wanker- Apologies.
Drunkn Munky: I think you mis read the code: i think it is 1093-41/115
The 1093 is the length - 150mm
The -41 is Ohlins spring rate code which equals the last number in Nmm
So your spring is a 150mm long 115Nmm.
Spot on if you weighed about 95kg with gear.
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Thu Dec 13, 2012 10:21 pm
by Drunkn Munky
I may well have read the code wrong, the spring isnt in the best of conditions.
That spring will be to heavy for me then, i'll be lucky to make 80kg fully kitted.
What size rose joints did you use on your pull arm? the more i think about it the more having a adjustable pull arm makes sense.
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Fri Dec 14, 2012 5:44 am
by 999Gomerz
First I bought this one and then machined the black alloy hex bits down as that unit is too long. then I also made a new alloy sleeve that is picture between both arms as this one is a bit short.
http://www.ebay.com.au/itm/2006-2010-Su ... 2a11ce9afd
You have an adjustable shock so you could get away with using the standard pull arm that comes with Ricks kit.
There are probably a bunch of standard bmw springs kicking around from people who bought them and then changed the spring for the 400. Ask them if you can have their old spring.
I have a bunch here but im on the other side of the world.
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Fri Dec 14, 2012 6:46 am
by lukemillar
999Gomerz wrote:Luke Millar: I just re-read my post and I sounded like a wanker- Apologies.
No worries, dude! No offense taken!
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Fri Dec 14, 2012 8:02 am
by porndoguk
You can have my BMW spring if you need it dave
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Fri Dec 14, 2012 8:25 am
by Drunkn Munky
porndoguk wrote:You can have my BMW spring if you need it dave
Cheers trig, bit of yellow paint and no one will ever notice
Re: How to: fit a BMW s1000rr rear shock to a VFR 400 nc30
Posted: Fri Dec 14, 2012 8:30 am
by porndoguk
Its brand new i dont think there are any chips on it, so youll get a nice finish I guess