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Discussion Starter #1
So today I took my new Road Star out to get some more break-in miles under the wheels and I brought my Garmin along so I could check the Speedometer. My old V-Star 1300 was off by 5 mph and I fixed that with a changeover to a larger diameter tire and a 31T front pulley.
It would appear that I may have to do the same with this bike. I'm 5mph off at cruising speeds of 70mph. So I set the throttle lock at 70 and I check my Garmin and I'm only doing 65. How is it that in 2015 ,after Yamaha has been building these bikes for the past 15 years, they still can't get something as simple as a speedometer to work right? Since cruising speed in Texas is anywhere from 75 to 80 mph I have to set my speedometer to 80 just to be cruising at 75 actual. :mad:
So the question is: from what I gather the older bikes shipped with a 33T front pulley but in 2003/4 they changed to a 32T pulley. Why would they put in a bigger engine and then reduce the gear ratio? Does my 2013 come with the 32T pulley and if so does anyone have a 33T they would want to sell me?
 

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I guess before I changed any gearing, I'd decide whether or not I was happy with the way the bike rides and pulls. I put a SpeedoDrd on my Raider to correct the speedometer. I wouldn't change the performance of my bike to fix the speedometer. Just my $0.02.
 

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I guess before I changed any gearing, I'd decide whether or not I was happy with the way the bike rides and pulls. I put a SpeedoDrd on my Raider to correct the speedometer. I wouldn't change the performance of my bike to fix the speedometer. Just my $0.02.
I would agree. My 99 Victory and the Yamaha 1100 are the ONLY motorcycles I've ever owned that had an accurate speedo. Once you know the error via GPS I really dont see it as any big deal but thats just me.
 

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Discussion Starter #4
That's partially the issue...but think about it; your riding along thinking your driving the speed limit when you're actually going slower. So for me to ride at 75 I'm having to run 80 on the speedo. That also means I'm running higher RPM which eventually cuts into my mileage. So going up one tooth isn't going to radically change anything except slightly lower cruising RIM and fix speedometer error.
 

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How do you know your GPS is correct? I have 2, different manufacturers.They don't match each other or my speedo.
Maybe try a stop watch and mile markers?
Is the problem the same say at 55?:confused:
 

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How is it that in 2015 ,after Yamaha has been building these bikes for the past 15 years, they still can't get something as simple as a speedometer to work right?
government regulations. all modern production cruisers have their speedos dialed up 10% versus actual speed.
 

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To me its much ado about nothing. I rarely look down at the speedo anyway. I usually base my speed off of the other traffic. When I am on a road alone I will glance down at it and as long as I am close I dont worry about it. So if it tells me I am going 5mph faster than I really am, so what.
 

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I`d like my speedo to be accurate but it`s not that big a deal. Like was said, how do we know that the GPS speed is accurate? My main reason for a correct speedo is for to guard against a speeding ticket.
 

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I`d like my speedo to be accurate but it`s not that big a deal. Like was said, how do we know that the GPS speed is accurate? My main reason for a correct speedo is for to guard against a speeding ticket.
Funny. That's the same reason I'm glad that I'm actually running a little slower than the speedo.

Just like setting a clock 5 minutes fast doesn't help if I do the subtraction in my head, I just take my display at face value and keep myself out of trouble. It's not like I keep it at the posted speed limit anyway.
 

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Discussion Starter #10
I've been using my Garmin for a while in different cages. During a trip to Biloxi I noticed the speedometer and GPS were spot on so I'm fairly confident it's accurate. I'm a daily rider so I not only ride to work every day but on weekends I travel with the HOG group for breakfast runs. As you know Harley owners like to ride fast. I just know that with my V-star 1300, anytime I pushed 80 to keep up with 75mph highway traffic my fuel mileage tanked because I was pushing close to 4000 RPM. Besides as I stated before, it's Texas and everything is fast and towns are spread out in the west so fuel mileage is really important out here.
 

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Discussion Starter #11
So I now have the 33T installed and so far I'm enjoying the results! Speedo is now within 2mph of my Garmin which i can live with. The rest will fix when I change to a larger tire. What i really like is the longer run out in gear before I have to shift. I'm used to the higher RPM of my old V-Star 1300 so I've had some issues when I'm accelerating into traffic and the engine cuts out suddenly.
 

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Could you provide a link to that regulation? It would put all my current bikes in violation.
It's not a requirement to be inaccurate. The law says that speed cannot be UNDERstated and provides an error allowance. Manufacturers CHOOSE to use this allowance for whatever reason with speculation ranging from reduced liability to accomodating a wide range of tires. The argument can be found and read ad nauseum throughout the web.
 

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I don't know if it matters to you or not, the odometer likely is not accurate now that you changed the gearing.
People on the Volusia Riders site that have used a "speedo healer" corrected the speed reading but affected the Odometer. The Odometer was accurate originally, the speedo not. Speedo healer made the speed accurate, Odometer not!
 

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I don't know if it matters to you or not, the odometer likely is not accurate now that you changed the gearing.
People on the Volusia Riders site that have used a "speedo healer" corrected the speed reading but affected the Odometer. The Odometer was accurate originally, the speedo not. Speedo healer made the speed accurate, Odometer not!
I guess the direction in which the odometer is off is the important part!
 

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Discussion Starter #17
I'm not that worried about the odometer. When I upgraded the 1300 I was about 1mph over so 75 was actually 76. I still got about 42 mpg based on distance traveled.
Like I stated before... out west we're really cranking so anything I can do to reduce my RPMs so the engines not running like a singer sewing machine is money in the tank. I've already drilled out the exhaust and this past weekend swapped the lower intake tube from the back of the air box to the front. This way air is forced into the box instead of sitting in a vacuum. I'll post pictures later. Next purchase is Leatherman seats for the long haul.
Sturgis here I come!
 
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