Speedo off by a bunch?

CBO Vaquero · 04-26-2015, 07:20 PM

Rode today with my GPS installed and found that the speedo is off by 6 mph at 55, it's reading slow. It get closer if your below 40 and actually gets better above 65? At 70 mph is only 2 mph off.

**HwyRider** · 04-26-2015, 07:22 PM

My Nomad 1700 is the same. The GPS keeps me at the right speed.

**Top Cat** · 04-26-2015, 07:46 PM

They all read slow to keep you from getting a ticket

dshelly · 04-26-2015, 09:14 PM

I installed a speedo healer from healtech.

http://www.healtech-electronics.com/products/sh/

tonik · 04-26-2015, 09:52 PM

Quote:

Originally Posted by CBO Vaquero

Rode today with my GPS installed and found that the speedo is off by 6 mph at 55, it's reading slow. It get closer if your below 40 and actually gets better above 65? At 70 mph is only 2 mph off.

Reading slow by 6......so at 55 you are going 61? That is backwards, they read high. When mine says 70 I am doing 67. So unless I misunderstood your description something very odd is going on.

If I read it backwards and you mean you are going 49 when it says 55...that is still very odd. Never seen one off that much.

**Jared** · 04-26-2015, 10:55 PM

I always guesstimate that they're about 10% off. Easy math.

CBO Vaquero · 04-27-2015, 07:55 AM

Yes, at 55 the GPS says 49-50 so it's around 5-6 mph off at that speed. However the way the speedo is made "55" is kinda hard to pinpoint but it still seems off a bunch,..to me.

blowndodge · 04-27-2015, 10:07 AM

Mine is dead on with my GPS

**schoeney** · 04-27-2015, 08:50 PM

Both my Nomad and now my Honda are off by 5-10%.

**Top Cat** · 04-27-2015, 11:22 PM

Quote:

Originally Posted by blowndodge

Mine is dead on with my GPS

Yeah but we are talking about real motorcycles, you ride one of those off brands if I remember correctly

Duc796canada · 04-28-2015, 11:47 PM

Hahaha, well in my neck of the woods, we photo radar, they zap us even at below 10 km/hr over...it would be nice to know exactly. I did take my BOM(Bike Owner's Manual) to court to fight a two tickets that claimed I was doing 18 over on my Monster, it states exactly that it is off by 8% in the BOM. Funny thing is, it was the same truck, and camera on different days, saying I was doing exactly the same speed over, I found it suspicious!! I got my tickets redude by 50% each.

04-26-2015, 07:20 PM	#1
CBO Vaquero Member Join Date: Apr 2015 Location: Preble county Ohio Posts: 259	Speedo off by a bunch? Rode today with my GPS installed and found that the speedo is off by 6 mph at 55, it's reading slow. It get closer if your below 40 and actually gets better above 65? At 70 mph is only 2 mph off. __________________ My new ride.... 2015 Honda F6B Deluxe Login or Register to Remove Ads
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04-26-2015, 07:22 PM	#2
HwyRider Join Date: Jun 2013 Location: South Shore, MA Posts: 4,629	My Nomad 1700 is the same. The GPS keeps me at the right speed. __________________ VBA # 02424 VROC # 35971 2010 Nomad 1700 Metallic Diablo Black/Metallic Titanium
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04-26-2015, 07:46 PM	#3
Top Cat Join Date: Jul 2007 Location: Peoples Republic of New York State Posts: 15,154	They all read slow to keep you from getting a ticket __________________ Tim "TC" Conley VBA #9 2011 Victory Kingpin mine 2013 Victory Boardwalk -hers [LEFT][COLOR=#000000] [SIZE=4]
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04-26-2015, 09:14 PM	#4
dshelly Sr. Member Join Date: Mar 2012 Location: Belgrade, MT Posts: 2,824	I installed a speedo healer from healtech. http://www.healtech-electronics.com/products/sh/ __________________ Dave "(dshelly)" Shellenberger 2014 Harley Ultra Classic 2007 1600 Nomad (Black) Shellenberger Machine Belgrade, MT Various Bagger Member (Harley Chapter) VBA # 2395
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04-26-2015, 10:55 PM	#6
Jared Join Date: Mar 2009 Location: Greeley, Colorado Posts: 6,772	I always guesstimate that they're about 10% off. Easy math. __________________ Jared VBA #1051 (Former President)
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04-27-2015, 07:55 AM	#7
CBO Vaquero Member Join Date: Apr 2015 Location: Preble county Ohio Posts: 259	Yes, at 55 the GPS says 49-50 so it's around 5-6 mph off at that speed. However the way the speedo is made "55" is kinda hard to pinpoint but it still seems off a bunch,..to me. __________________ My new ride.... 2015 Honda F6B Deluxe
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04-27-2015, 10:07 AM	#8
blowndodge Sr. Contributor Join Date: Jul 2007 Location: Washington City, Utah Posts: 16,474	Mine is dead on with my GPS __________________ I love my Victory Cross Country Tour 106. Smells like Victory! Ultra's are Limited There are two types of Harley riders. Those that trailer them and those that push them. The most Interesting Man in the World "Find the things in life you don't do well and don't do those things" Member # 0005
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04-27-2015, 08:50 PM	#9
schoeney Join Date: Jun 2008 Location: NW Region Posts: 5,222	Both my Nomad and now my Honda are off by 5-10%. __________________ VBA #659 2003 Nomad 1500 (Gone but never forgotten) 2005 Honda ST1300 - Sweet and still kickin 2006 Honda Goldwing - Best Boat in the Marina
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04-28-2015, 11:47 PM	#11
Duc796canada Member Join Date: Mar 2015 Location: Ontario Canada Posts: 146	Hahaha, well in my neck of the woods, we photo radar, they zap us even at below 10 km/hr over...it would be nice to know exactly. I did take my BOM(Bike Owner's Manual) to court to fight a two tickets that claimed I was doing 18 over on my Monster, it states exactly that it is off by 8% in the BOM. Funny thing is, it was the same truck, and camera on different days, saying I was doing exactly the same speed over, I found it suspicious!! I got my tickets redude by 50% each. __________________ 2014 Vaquero SE Cirius engine guard lights Vizi-Tec Supa-brake II Afterburner 4500LM LED headlamp Ivan's Performance 12 VDC plug-in BAK Thunder mfg. Cobra Tri-Flo 2011 Ducati Monster 796 2006 GSXR 600 (track bike)
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