Hi.
im tryin to get my cylinder base nut on (the one near the Power Valve spindle). what is a good way to torque it down cos you cant really get in there with the normal socket attatchment.

jamies uses this method:
http://www.dreamgate.ne.jp/nsr/technical/cody_20.jpg

not too sure whats goin on there tho...

can someone help me out.?
cheers
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Philip Ahn
MC21 NSR250R

im poor...

That nut's a bugger. I use a similar method where I braized an M8 nut (same as cylinder base nut) onto a 12mm spanner just long enough to poke out into the breeze far enough for me to get my torque wrench on.

You do have to compensate for this extra leverage and adjust your torque wrench accordingly. To be sure I then use the same "extra reach" tool for all the nuts just to make sure that the torque is identical.

Then I wised up and used the proper Honda tool, which works only if the RC valve cables and gubbins are removed. This allows direct fitting onto the nut.

This tool won't work on the 300 cylinders 'cos the casting's in the way.

looks like the spanner is connected to the nut and the tourque wrench connected to the spanner at 90 (right angle) not sure hows hes done that bit maby a socket, but if i remeber from my engineering days at UNI this will provide the same force as if the wrench was attached directly, the 90 angle is important. can someone tech just confirm im sure this is right but its been 15 years. and oh yeah the tourque will be ever so slightly less due to the joint in the spanner/wrench but very very small

doh matt got there as i was typing

hmmm...

i think i understand how it kinda works...
will give it a go soon...
so the torque wrench must be connected to a M8 nut on the end of the spanner, and the other ring side should be over the M8 cylinder base nut?

did that make sense?

cheers.
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Philip Ahn
MC21 NSR250R

im poor...

wont the spanner make quite a difference?

because i think you are referring to Torque=Force*Perpendicular Distance.

and in this case the distance has increased significantly.from initially the

distance of your hand to the nut.
to
distance of your hand to the nut+ spanner length.

hmm...but i think that only applies if the spanner + wrench were one rigid piece.?

not sure...been a while since i done physics also..haha
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Philip Ahn
MC21 NSR250R

im poor...

I believe the wrench gives you more leverage that's why you need to set the torque a little lower. As Matt said, if you use the wrench/torque wrench combo for all 4 nuts, you'll at least have an even amount of torque on all the base nuts.

I just went ahead and bought the Honda socket tool from Jha. Cost me a bundle but hey, I like collecting tools that only have one purpose.

haha...i wish i had the $$$ to get all these exotic tools...
im haing trouble getting money to get a torque wrench! haha..

yeha i will just tighten the other nuts as usual and then use this method shown..then put the spanner on the other nuts and compare.


_________________
Philip Ahn
MC21 NSR250R

im poor...

I run the extension spanner inline with my torque wrench, and work it out as follows:

Torque Req'd (T) = 25Nm
Torque wrench length (L) = 260mm
Adapter Length (AL) = 45mm
Total length from handle centre to bolt centre = 305

Set torque = (TxL) / (L+AL)
= (25x260) / (260+45)
= 6500 / 305
= 21.3Nm

Like I said, this is with the adapter in line with the wrench. If the adapter is not in line then you'll have to start messing with trig, and I can't be bothered! Just keep it straight. Unless of course you turn it to 90 degrees in which case the trig will work out L=260mm (in my case) so I can just use 25Nm, but if the wrench slips away from 90 degrees to say 80 degrees it'll increase the torque at the nut and over tighten it.

Keep it straight and you can't over tighten it.

Demon Tweeks do a spanner with a torque wrench hole in the middle. Try their website...
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

I use the Demon Tweeks spanner.
Works on the 300 too.
Andy should SO be having this tool on the Forum!
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Back in the spring, when I was a little more flush, I posted a thread about the possibility of "rental" system for these special tools as, let's face it, most of us (*StephenRC45 being the exception!! ) don't need them very often, but out of the 7 posts to the thread, 4 of them were by me, and one by Clarkie said he'd rather buy them from me!!

I will make some enquiries about the tools, and see what I can come up with. The biggest problem with not only special tools, but virtually any good quality tool, is that they are often pretty bloody expensive. Markup in the Marketplace is so small that it may be impractical for me to sell them.

*Note: Stephen is pissing on my parade at the moment as his MC18/250 is both flying AND reliable!!

_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

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Yup... Im trying to get a clutch Tool?? LOL What how much F^%&K

im looking at one on ebay but im a bit worried as the honda one looks round and clutch basket shape and this one looks like 2 bars welded.
Andy did you get my mail re: clutch tool and gaskets?

The JHA tool for this job looks pretty sharp.
Cheap i bet.
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