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#145595 - 06/23/19 01:13 PM Mechanical Tachometer
John Ellis Offline
Junior Member

Registered: 06/19/19
Posts: 7
Loc: West Virginia(panhandle)
Hope I havenít missed a post, but through searching all I could find are digital inductive tachs being installed. Recently saw a picture from a TAT page on FB with an XT225 with factory looking speedometer AND tachometer(believe itís from a DT125/175) but the guy posting didnít get any information or the riders name. Iím just wondering how difficult the install would be to have a gear driven, factory looking tach.




Edited by John Ellis (06/23/19 01:14 PM)
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2007 XT225: intake/exhaust moded, 42.5/130 jets

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#145597 - 06/23/19 03:05 PM Re: Mechanical Tachometer [Re: John Ellis]
Muniac Offline


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Registered: 01/16/04
Posts: 5759
Loc: Montrose, CO
If you did find an analog tachometer driven through a cable. Where would you tap into the engine for the cable? And how would this be calibrated? I think an electronic tachometer with an analog dial would be much easier to locate and install. You can derive a signal from the primary of your ignition coil. I'd guess the pulses per second would be a factor of 2 and a time base conversion to get engine RPM. That would all be in the tachometer's internals. Just a thought. Good luck!
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#145598 - 06/23/19 03:33 PM Re: Mechanical Tachometer [Re: John Ellis]
John Ellis Offline
Junior Member

Registered: 06/19/19
Posts: 7
Loc: West Virginia(panhandle)
Right, I understand all that and that is my question. DTs have a hole right near the oil pump on the front of the engine where the mech drive for the tach comes off. I was hoping to find this person as a member here to fill in the blanks. Iíd post the photo, but Iím not sure how to from my phone.
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2007 XT225: intake/exhaust moded, 42.5/130 jets

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#145608 - 06/24/19 02:38 PM Re: Mechanical Tachometer [Re: John Ellis]
Muniac Offline


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Registered: 01/16/04
Posts: 5759
Loc: Montrose, CO
Imgur can provide a free photo hosting service and clean URLs which can be used here to embed photos. You'll upload to Imgur, get a link ending in .jpg or .png and use that to display your photo(s). From the Full Reply Screen, you'll use the 4th icon from the left.

On the XT225, I'm not aware of any holes (or gearing) in the engine case for a tachometer.
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#145612 - 06/24/19 11:43 PM Re: Mechanical Tachometer [Re: John Ellis]
John Ellis Offline
Junior Member

Registered: 06/19/19
Posts: 7
Loc: West Virginia(panhandle)
[img]https://www.amazon.com/photos/shared/6w33tssSQeaV7ogs1m2-ew.A1axtmC_DazY_0T0KCs6mL[/img]

This is the picture but it doesn't really answer any questions. Maybe someone will recognize the bike🤷🏻‍♂️
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2007 XT225: intake/exhaust moded, 42.5/130 jets

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#145801 - 08/06/19 05:55 PM Re: Mechanical Tachometer [Re: John Ellis]
Rubicon Offline
Member L1
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Registered: 08/27/12
Posts: 155
Loc: NorCal
Actually the picture answered everything.I was going to tell you that the XT350 has a mechanical tach and to look there for possibilities as the front wheel is easily put on the 225 because it is the same except for a larger brake rotor.The minute I saw the picture it is clear that is a 350.I would still advise you to pursue the possibility of adapting a tachometer from a 350.

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#145802 - 08/07/19 05:33 AM Re: Mechanical Tachometer [Re: John Ellis]
Rubicon Offline
Member L1
*****

Registered: 08/27/12
Posts: 155
Loc: NorCal
So I was confusing the tach cable with the speedometer cable. The wheel isn't the problem it's the engine and to be honest I've never missed having a tachometer on this bike.The only purpose I can imagine is knowing you are in sixth and not trying to shift into a seventh gear that doesn't exist.I do know people have put on the digital tachs and the only complaint is slightly slow response time.

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#145803 - 08/07/19 07:19 PM Re: Mechanical Tachometer [Re: John Ellis]
BillV Offline
Member L4
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Registered: 10/31/07
Posts: 462
Loc: Santa Barbara, CA
Those little tach/hour meters are cheap but I've heard about response time issues for years. They seem somewhat crappy. At one time I was considering this.

The size seems good for our bikes. I like all the options and a stepper motor ought to give better response (no guarantee). But not waterproof is a downside and will require some sealing.

Unfortunately, I've never pursued it any further.
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1995 XT225 Cobra exhaust - Town & trail
2006 GSX-R1000 - Highway

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#145836 - 08/13/19 09:04 PM Re: Mechanical Tachometer [Re: John Ellis]
BillV Offline
Member L4
*****

Registered: 10/31/07
Posts: 462
Loc: Santa Barbara, CA
I was playing with the options for a different Speedhut 2 5/8" tach and came up with this today:


Not bad!
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1995 XT225 Cobra exhaust - Town & trail
2006 GSX-R1000 - Highway

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#145854 - 08/15/19 06:39 PM Re: Mechanical Tachometer [Re: John Ellis]
peejman Offline
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Registered: 06/03/13
Posts: 3235
Loc: East TN USA
Car related tach's generally aren't set up to work with a single cylinder engine.
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2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.

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