mc21 swing arm

**Fri Aug 31, 2012 9:35 pm » Post: #1 » Download Post**

Hi there
i need some help if anybody knows if a NC35 swing arm can be install on a MC21 frame and what i need ?
i have the swing arm and the rim?

**Sat Sep 01, 2012 6:56 pm » Post: #2 » Download Post**

I have both MC28 and NC30 arms, one difference that I can see it the type of linkage that it uses

**Sun Sep 02, 2012 9:00 am » Post: #3 » Download Post**

Hmmm - from what I remember the arm itself is the same, but the linkages and spacers are definitely different.

This is a very dim memory. You could ask some of the fellas on 400 grey bike the same question as well.

**Mon Sep 03, 2012 4:53 pm » Post: #4 » Download Post**

Did it years ago (before MC28 existed) and it was alot of agro.

RVF swinger has offset shock (not central like NSR) and different shock linkage mounts. You'll need to cut a section of the shock tunnel out and reweld a plate in. Then you have cut off the shock linkages mount, have a new one machined and then weld that on. Finally I seem to remember the rear wheel needed a spacer too to get it to line though.

Best get yourself an MC28 swingarm, seriously!

**Tue Sep 04, 2012 2:10 am » Post: #5 » Download Post**

Hi guys thank you all i have the linkage from the MC28 but the mount on the frame is not on the same position as the swing arm and if like
Dmitry mention both are the same then the MC21 frame it is different from the MC28 ? but i have see MC21 with MC28 swing arm
and thank you all

**Tue Sep 04, 2012 2:34 am » Post: #6 » Download Post**

MC28 has a larger pivot bolt, other than that MC28 ProArm to MC21 frame is an easy swap, uses same shock.

What I was referring to is that NC30 uses a shock with a "fork" on the lower end so the linkage is not same as the shock fits over it not inside it like NSR

**Tue Sep 04, 2012 3:16 am » Post: #7 » Download Post**

The VFR and RVF arms are different enough to make it a pain in the arse of a job. As racer38 says, do yourself a favour and get an MC28 swingarm!

There are loads of posts covering ProArm downgrades for the MC18 and MC21, and people have already given sound advice. Use the search!

Duncanb has posts all about it in his build thread. The £10 it will cost to be a member will be saved just in time alone reading some of the extra information available to members.

Too late for you now, but buying an NC30 or NC35 swingarm for an NSR conversion is a false economy.
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