What tach for a '79 440 Exciter

70mofo

70mofo

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Jan 4, 2012
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Age
60
Location
Mid MI
This summer I put a Comet 102 on my Exciter 440 that does not have the oil pump gear so I have no working tach. I have read that I need a 2 pulse tach and have read how to wire it, one wire to ground and the other to the lighting coil.

What I need to know is what vintage and newer sleds had 2 pulse tachs? I know a lot of the earlier Polaris Indy twins had 2 pulse tachs, but I am looking for something smaller than 4 inches in diameter and possibly one that will fit in the existing dash hole that is currently holding my worthless 3 1/2" cable driven tach. I would prefer to use the existing mounting hole just to keep it looking somewhat stock, but can mount it on the bars if need be. Brand of tach makes no difference to me.

A friend of mine said he could pick one up for me at Underwood's Salvage here in MI for about 8-$10, but he said Underwood's has about 2,471,953 used tachs to choose from ....so please help him choose the correct one for my sled. Gotta get one hooked up soon to get some clutch testing done .

Thanks in advance for any help.
 
no tach that is worth a crap will fit the stock guage pod .............any polaris twin from up to late 90's mid to late eighties eltigre's ...........hope this helps
 
70mofo said:
This summer I put a Comet 102 on my Exciter 440 that does not have the oil pump gear so I have no working tach. I have read that I need a 2 pulse tach and have read how to wire it, one wire to ground and the other to the lighting coil.

What I need to know is what vintage and newer sleds had 2 pulse tachs? I know a lot of the earlier Polaris Indy twins had 2 pulse tachs, but I am looking for something smaller than 4 inches in diameter and possibly one that will fit in the existing dash hole that is currently holding my worthless 3 1/2" cable driven tach. I would prefer to use the existing mounting hole just to keep it looking somewhat stock, but can mount it on the bars if need be. Brand of tach makes no difference to me.

A friend of mine said he could pick one up for me at Underwood's Salvage here in MI for about 8-$10, but he said Underwood's has about 2,471,953 used tachs to choose from ....so please help him choose the correct one for my sled. Gotta get one hooked up soon to get some clutch testing done .

Thanks in advance for any help.
Click to expand...
would the tach wire go to lighting coil or ignition coil?
 
Tach

70mofo said:
One wire to the lighting coil, the other to ground.
Click to expand...

hwy Joh i got a 2 pilse Polaris Tach . it has 3 wires on it a yellow a red and brown > i am assuming yellow to lighting coil and brown to grnd is the red one to yellow also for the tachs light ??
thnx
Dave
 

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worked great for me . I got a polris Tach and soldered the red to the yellow and the brown went to ground wire on my lighting coil circuit wires . works perfect and also has the light for night time riding . thanks for all the tech help John . ps > was gonna get a Comet 102C but have been reading Comet went out of Business so don't wanna be stuck with a new clutch ya cant get parts for down the road in the future
 
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