Koso Tach/Speedo Install problems


Information and questions on GL1000 Goldwings (1975-1979)
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Spaz Attack
Posts: 2
Joined: Fri Jan 01, 2010 6:47 pm
Location: Minneapolis,Minnesota
Motorcycle: 1977 GL-1000

Koso Tach/Speedo Install problems

Postby Spaz Attack » Tue Feb 01, 2011 1:39 pm



Just put a new Koso Tach/Speedo combo on my 77 Gl1000 - after making all the connections the tachometer would bounce wildly and was completely inaccurate. Went on many a chat board and even called Koso America and no one could help - I ended up making a homemade Tach filter with parts from Radio Shack. Parts set me back about five dollars. The tach movement is now fluid and accurate. If anyone has the same problems, give me a shout. Spaz Attack.



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thrasherg
Posts: 1837
Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: Koso Tach/Speedo Install problems

Postby thrasherg » Tue Feb 01, 2011 3:51 pm

What Koso unit was this? I am building a project bike and will use the RX2N unti so am interested in knowing what unit you used and if I might need a similar filter for my bike..

Regards Gary

Spaz Attack
Posts: 2
Joined: Fri Jan 01, 2010 6:47 pm
Location: Minneapolis,Minnesota
Motorcycle: 1977 GL-1000

Re: Koso Tach/Speedo Install problems

Postby Spaz Attack » Tue Feb 01, 2011 7:47 pm

I am also running the RX2N Koso. I have a Dyna electronic ignition and Dyna coils. Hooking up the tach to the negative/trigger side of one of the coils and setting the Koso to the Hi trigger option in the set up menu. I previously ran an Acewell guage with no problems but the Koso bounced and floated wildly - you could tell it was seeing a lot of junk in the trigger signal. I found a Chevrolet Camero restoration site that showed how to make your own tach filter - I copied exactly and it work perfectly! I put mine nearest the guage in the headlight bucket where I made all connections - I figured it would get the cleanest signal from there. Here is the forum I found it on. Make Your own Tach Filter | Firstgens.com I like the Koso compared to the Acewell - the only bad is the 24 hour clock. Unless you like military time. Spaz

User avatar
thrasherg
Posts: 1837
Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: Koso Tach/Speedo Install problems

Postby thrasherg » Wed Feb 02, 2011 11:23 am

Thanks, I will try to find the circuit on the WEB site. I love 24 hour time, all my clocks are 24 hour.. So no problem for me.

Gary




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