Tach reading high, Myth, Legend, or BS? - Steve Saunders Goldwing Forums
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post #1 of 12 (permalink) Old 04-02-2014, 06:44 PM Thread Starter
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Tach reading high, Myth, Legend, or BS?

The tach on my "new" '99 SE is reading high. I've dug around and I cannot seem to find a definitive answer.

Is the tach bad, or is there a bad resistor in the circuit that I can replace?

Cliff Hipsher
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post #2 of 12 (permalink) Old 04-02-2014, 06:56 PM
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What do you mean by high? What rpm is it turning at 60 mph?
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post #3 of 12 (permalink) Old 04-02-2014, 08:23 PM
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What makes you feel it's running high? Have you measured to a digital external tach?

Stu
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John 14:6 Psalm 118:19-29
CMA Wings of Eagles-Escondido, Patriot Guard Ryder
+2008 Cabernet Red ABS/Airbag bought 6/2013 @16,000
+1983 ASPENCADE Barn find @36,000 to be sold
+1976 CB750K6 @25,000 was Dad's
Previous bikes
-1999 GL1500 ASPENCADE Red Sold barn find restored
-1999 GL1500 SE(@57k)(totaled by cagger @105,000) Feb 2013
-76 CB750K Red(new) sold @ 45k
-75 CB750K Blue(new) 9,000 mi Before cousin totaled it.
74 CB450 Burnt Orange(new) 9,000 miles sold
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post #4 of 12 (permalink) Old 04-02-2014, 08:39 PM
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It's been a few days since I rode mine, but IIRC in 5th gear 3,000 RPM should be about 65 mph?

~ John


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post #5 of 12 (permalink) Old 04-02-2014, 09:30 PM Thread Starter
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Well, for starters, there ain't no way this engine is turning 6 grand at 65 MPH. 3 grand or there abouts would be more like it, but it danged sure ain't 6. For another thing, I can't get this thing to idle below an indicated 1K RPM, and it seems happy at about 1.6K, which is almost exactly twice the recommended idle RPM. There for, this tach is indicating twice the actual engine RPM.

What really surprises me is after all of the searching I've done, this seems to be a fairly common problem but I have yet to find a definitive answer. One guy thought it was the tach, another said something about a tach driver, somebody else said it was a bad resistor, and some Einstein said it was a coolant level issue (Yeah right, and I've got this bridge for sale....).

So, is the tach toast, or what?

Cliff Hipsher
ICC USN (Ret.)
'03 883 XLH
'91 Yamaha Venture Royale
'99 Aspencade SE
I.A.M.B.K.
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post #6 of 12 (permalink) Old 04-02-2014, 09:40 PM
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I haven't seen any others posts on that but it is definitely not correct in that reading for sure.
I don't know the answer to your problem.
I do have a black set of gages from a 97. I might have a 99 white tach. I'll check tomorrow.

Stu
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John 14:6 Psalm 118:19-29
CMA Wings of Eagles-Escondido, Patriot Guard Ryder
+2008 Cabernet Red ABS/Airbag bought 6/2013 @16,000
+1983 ASPENCADE Barn find @36,000 to be sold
+1976 CB750K6 @25,000 was Dad's
Previous bikes
-1999 GL1500 ASPENCADE Red Sold barn find restored
-1999 GL1500 SE(@57k)(totaled by cagger @105,000) Feb 2013
-76 CB750K Red(new) sold @ 45k
-75 CB750K Blue(new) 9,000 mi Before cousin totaled it.
74 CB450 Burnt Orange(new) 9,000 miles sold
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post #7 of 12 (permalink) Old 04-02-2014, 09:46 PM Thread Starter
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Quote:
Originally Posted by AZgl1500 View Post
It's been a few days since I rode mine, but IIRC in 5th gear 3,000 RPM should be about 65 mph?
It's been my experience that a majority of the vehicles I have owned or operated had a sweet spot between 2.5k and 3k RPM, and interestingly enough, that sweet spot tends to correspond to most posted US speed limits, ie, 1st gear at 2500 RPM = 25 mph, 2nd gear is 35, 3rd gear is 45, 4th gear is 55, 5th gear is 65 mph. Today I was running 65 mph in 5th with an indicated 6+K RPM, and the engine was happy as a clam...

Cliff Hipsher
ICC USN (Ret.)
'03 883 XLH
'91 Yamaha Venture Royale
'99 Aspencade SE
I.A.M.B.K.
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post #8 of 12 (permalink) Old 04-02-2014, 09:51 PM
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I agree with your gear vs speeds. That is what I recall also.

download a copy of the ETM and see if you can figure it out.
https://www.yousendit.com/download/T...ays4NVZYd3NUQw

~ John


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post #9 of 12 (permalink) Old 04-03-2014, 10:38 AM Thread Starter
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Originally Posted by newday777 View Post
I haven't seen any others posts on that but it is definitely not correct in that reading for sure.
I don't know the answer to your problem.
I do have a black set of gages from a 97. I might have a 99 white tach. I'll check tomorrow.
I just looked, and my '99 has black gauges. Is this an indication of a dash/gauge replacement?

Cliff Hipsher
ICC USN (Ret.)
'03 883 XLH
'91 Yamaha Venture Royale
'99 Aspencade SE
I.A.M.B.K.
Safety is NO accident.
I Ride. Therefore I am....
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post #10 of 12 (permalink) Old 04-03-2014, 10:44 AM
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Honda swapped back and forth on the '97, 98, 99, 00 year models from black to white.

I don't know which years were white, but I don't like white. Can't see them under street lights.

~ John


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