Tachometer for the scooter

keithw · Post by **keithw** » Tue Oct 07, 2008 7:58 pm

Hello all,

Been looking at tachs to put on the Spree. Came across a used snowmobile tach on ebay. Figured it was from a two stroke and cheap so why not give it a try. Tried various ways to hook it into the ignition system with no luck. Then it dawned on me that the lighting and battery charging coils produce A.C. . I hooked the tach up to the lighting coil and it works great. The calibration was all off so I opened it up and found an adjustment pot on the inside. Calibrated it against my clip on tach. Built a little bracket to mount it on the front panel below the handle bars near the turn signal. So now I have a nice looking 10,000 rpm tach to help with modifications and tuning.

keithw

Kenny_McCormic · Post by **Kenny_McCormic** » Tue Oct 07, 2008 8:03 pm

Only 10k? Should have went for a 12 or more.

Post by **noiseguy** » Tue Oct 07, 2008 9:06 pm

I think you missed the "cheap" part.

keithw · Post by **keithw** » Tue Oct 07, 2008 10:21 pm

I have seen an 11k snowmobile tach and there might be 12s out there. As Noiseguy pointed out the key word was cheap. The Spree factory redline is 8k rpm. A 10k tach covers all but the real hard core tuners.

The other option is to recalibrate it for higher rpms. You can put your own scale on it and adjust for whatever you feel you need.

keithw

tru72 · Post by **tru72** » Tue Oct 07, 2008 10:27 pm

a really good tach for tuning is called a tiny tach.. about 75 bucks..you can rev the crap out of it. its digital, very small, easy 1 wire hook up
aloha
D

Kenny_McCormic · Post by **Kenny_McCormic** » Wed Oct 08, 2008 4:59 pm

tru72 wrote:a really good tach for tuning is called a tiny tach.. about 75 bucks..you can rev the crap out of it. its digital, very small, easy 1 wire hook up
aloha
D

I hear they are laggy and update slow.

edwardzx7 · Post by **edwardzx7** » Wed Oct 08, 2008 5:27 pm

any pictures?

Arnadanoob · Post by **Arnadanoob** » Wed Oct 08, 2008 5:35 pm

I use a Daytona tach with a 18k rev limit, inductive type. Reads very well, doesn't jump around like it's possessed and updates very quickly. Cost me 175 bucks.

Bear45-70 · Post by **Bear45-70** » Wed Oct 08, 2008 8:44 pm

I prefer something like this. Inexpensive, easy install and works.

http://www.cabelas.com/prod-1/0015240015383a.shtml

keithw · Post by **keithw** » Wed Oct 08, 2008 10:53 pm

Here is a picture of the tach and head temp gauge. I did manage to crack the glass on the tach recrimping the bezel. Darn the luck.

keithw

Dac · Post by **Dac** » Wed Oct 08, 2008 11:08 pm

i have wanted a tach since my first elite. thats makes me want one so bad.

if i do get one i think ill need your help wiring it.

tru72 · Post by **tru72** » Thu Oct 09, 2008 1:01 am

laggy and slow huh? you heard?
maybe you should buy one and test it for us? The small engine repair shop uses them here and it sure doesnt seem laggy and slow to me. Since you "heard" it is, you might go and watch that guys youtube vids dio speed demon. He has a vid of it ...

http://www.tinytach.com/tinytach/commercial.php

http://www.youtube.com/watch?v=AOYvwf1Q-qw

MotorMaker · Post by **MotorMaker** » Thu Oct 09, 2008 1:34 am

Perhaps he was using the standard version, which updates every 2.5 sec. Instead of the commercial version which updates every .5 sec?

keithw · Post by **keithw** » Thu Oct 09, 2008 8:59 am

I looked at the tinytach but it only goes up to 9,000 rpm. I have run my engine to 11,000 and the Spree is currently doing 9,500. That and the analog gauge with the needle waving at you is just cool. So far I've only messed with one but the snowmobile tach was cheap and not that hard to get working.

keithw

MotorMaker · Post by **MotorMaker** » Thu Oct 09, 2008 10:48 am

Commercial Tiny-Tach├óÔÇ×┬ó Specs
Tachometer and hour meter for gas engines.
Can be programmed for different engines.
RPM to 19,990.
Updates every 1/2 second.
High RPM recall.
Contains tachometer, hour meter, two service timers, job timer and max RPM.