In cleaning/stripping my MC21 I noticed this part not properly fastened and was curious to its purpose.
It's part number 11 in the attached picture and bolt number 30 is missing, so it's attached to the swing arm
but just hanging loose.

Anyone know if the missing bolt is a special or can someone give me the bolt specs so I can replace it without
spending 25 bucks and waiting a month?


thanks in advance,

Al.
_________________
Cheers....

Al

Bikes:
GPZ900
NC30
NSR250SE
RGV250 vj22

What you have there is the torque arm. If it's hanging it most likely wasnt put back together properly. This little thing stops the engine from flexing in the frame, and without it you will have very clunky gear changes and will suposedly run the risk of losing your chain. Never seen this happen though.

Are you missing the bolt only or also the bushes etc?

Your chain will come off as the motor twists under hard acceleration . I can check the sizes this afternoon when I am in the garage .

That would be appreciated, thank you.

Not sure if the bush is missing as well but will check. Fingers crossed.
_________________
Cheers....

Al

Bikes:
GPZ900
NC30
NSR250SE
RGV250 vj22

Sorry to resurrect an old thread, however I have got a replacement bolt (no 30 in picture on first post) but I cant find the torque setting for it.

In the parts fiche on ****** Performance (where I got the bolt) it's called "bolt stopper link" but I cant see anything in the Torque Values section of the online manual. There's a couple of possibilities:

Swing Arm Pivot Lock Bolt ?
Swing Arm Pivot Adjuster Bolt ?

It says the standard setting for a 12mm bolt is 5-6 kg-m but I'd rather get it right.

Can anyone help?


Cheers...

Al.
_________________
Cheers....

Al

Bikes:
GPZ900
NC30
NSR250SE
RGV250 vj22

You'll find it in section 20-36 of the MC16/18/21 manual. Right at the top of the page.
_________________
Andy.
NSR-WORLD.COM

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Interesting this.

I get clunky gear changes so I tried to see if I had the same problem.

I couldnt see anything at all that looked like the torque arm behind the engine.

Where is it fixed to on the engine and where on the swing arm does it connect to, as I cant see anywhere where something seems missing. I maybe just looking in the wrong place.
_________________
Russ

MC21SP

Russ wrote:
Where is it fixed to on the engine and where on the swing arm does it connect to...

Just below, and behind the centre of the front sprocket. It's secured to the motor with a heafty old M12 (if I recall correctly) bolt... so there's a big old hole in the cases where it should be if it's not there!

The link is secured to the swingarm by the pivot bolt, and fits in the space between the arm and the frame.

Edit: There's a very good diagram of it in the MC28 Service Manual, on page 13-14.
_________________
Andy.
NSR-WORLD.COM

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Thanks,

It's all present and correct so that isnt going to be the reason for the clunky gear changes.

Could be the bushes worn on that arm I suppose or wear on the clutch hub maybe.

I,ll put up with it until after this weekends track day at RAF Valley and have a better look.