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Hand held non contact tachometer (Read 49 times)

tom3949

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Hand held non contact tachometer
07/23/15 at 10:50:44

Have just come across a 'mini hand held non contact tachometer" on eBay in the UK:

http://www.ebay.co.uk/itm/Mini-LCD-Handheld-Non-Contact-Digital-Photo-Tachome...

Only £10, (approx $15). Just wondered if anyone had used one to check the idle speed before.

Not particularly useful for me at the moment as my bike has decided not to start Angry

but that's another story!

1993 Suzuki Savage based RYCA bobber

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Hand held non contact tachometer Reply #1 - 07/23/15 at 11:30:25 since the savage doesn't have a prop, it's gonna be hard to use.
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tom3949 YaBB Newbies Offline On the bucket list - Daytona bike week. Posts: 43 Liverpool, UK Gender:	Re: Hand held non contact tachometer Reply #2 - 07/23/15 at 11:51:06 Didn't know how these things worked. So if it's only useful if you have a drive shaft I won't be investing in one.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Hand held non contact tachometer Reply #3 - 07/23/15 at 11:56:32 Save your money.
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Dave

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Re: Hand held non contact tachometer
Reply #4 - 07/23/15 at 12:49:04

You can get these kind of things and use them pretty easily, and they are affordable. You just have to wrap the sensor wire around the spark plug wire a few times....then read the rpm. You don't have to mount it permanently if you don't want to - or you can just use some 2 sided foam tape and mount it on the frame somewhere and it will also keep track of the hours. I had one on my trials bike to keep track of hours for oil changes.

http://www.ebay.com/itm/Digital-Engine-Tach-Tachometer-Hour-Meter-Gauge-Induc...

Someday I will be old......But not today!

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Steve H

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Re: Hand held non contact tachometer
Reply #5 - 07/23/15 at 21:22:43

The non-contact thing has to have a light variation to "see" the rotation.
I've seen people with RC cars paint half the flywheel white and the other half black so it can "see" the difference.

If it's for an airplane, you won't be able to set it for single pulse per rotation. It'll only read half as fast unless you make a stripe of some sort on opposite sides for it to see. Then set for 2-blade prop. I can't think of anywhere on a savage that you could get to crank rotation without losing your oil so it'll never work.

87 LS650, 2005 Ninja 250, 2009 Yamaha C3, 2001 Honda Reflex. On 2 wheels since 6/80.

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