Chain Monkey tension checker?

[Wonko The Sane]

Anyone used one of these? https://www.tru-tension.com/motorcycle/

Is it actually any good, can be quite a faff with a tape measure behind the exhaust when checking my chain tension, often on an evening with just the patio light to work by.

Or is it just another gadget that doesn't really work?
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[DrSnoosnoo]

I never actually measure, I just give it a wiggle :S

You can generally "feel" if it is too slack or tight
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[winz]

Sounds like a bit of a gimmick to me. I know my fingertip is an inch, so I judge the slack with that.
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[Vincent]

If it helps, I can't see it doing any harm, as above tho, I don't measure, just go by eye. The measurements are only there as a guide, what's more important is to double check with the bike off the stand and look out for tight/loose spots.
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[MCN]

Not sure if a 'tool' can be considered as 'Snake Oil' but if it can then this is indeed snake oil.

Very complicated method of over-complicating a simple operation.

eg. What do they mean by "guess work"?

The only guess work would be guessing the OEM spec. or guessing what 25-35mm 'looks' like.

Call me old fashioned if you like but I would use the £22 quid for a 12 pack of piss.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[Matt B]

[Rogerborg]

Hang on, that trinket appears to introduce an absolute amount of slack dependent only on the vertical movement specified in the manual.

How does that take into account the length of the chain? Not the pitch, the distance between sprockets.

25mm of vertical movement in a short chain needs more slack than 25mm movement in a long one. But that gadget will give you the same amount of slack for either one.

Seems a bit 5-quarter-turns-in-a-circle.
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[P.]

Put finger under chain. Move it.

Free. 2 second. Works on a ZZR. Have done before. Gimmick product is gimmick.

[Ed Case]

You might use this thing once them forget about it and use your finger wrapped in a piece of kitchen roll because you can't be arsed to find it, plus £23.00 will buy a new chain for smaller bikes. Gimmick, don't waste your dosh.

[DrDonnyBrago]

You'd need to calibrate it for each bike as the length of the chain varies between models. Do not want.

[Val]

[MCN]

[Taught2BCauti...]

My first thought, was they are only using the tool gimmick to set the chain initially - it provides no easy means of checking the tension periodically - so you still need to know how to do this yourself - which means that you don't need the tool gimmick anyway.

Most important things, are to make sure that the centre-lines of the front and rear sprockets line-up with the centre of the swing arm pivot...

[img]https://dl.dropboxusercontent.com/u/439700/chnsag3.jpg[/img]

... and to check the slack in at least 4 positions along the chain's entire length.
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[MCN]

[talkToTheHat]

Specialist tool for job where perhaps a ruler is needed if not just a boot-toe?
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