innacurate speedometer question

[zepol]

What ever tells the speedometer how fast its going is it in thr engine or back axle? Or both? If my speedometer is not accurate where do i start to fix am getting a tryk that someone added a speedometer but its off by 20mph ..

[Ghostv2]

From what i understand you have to have the correct gearbox for that machine. Im talking about the little thing that is down on the front axle. If you are asking about that 86 tecate, he probably used the speedo drive that was on the street bike that the motor came from. Which when you put it on the trike, its just not accurate.

Now im sure some are compatible, like the 185/200 but from what i think i know you couldnt use it on a 200x. I think the 200x drive spins backwards or something.

Now before someone else comes in and yells at me for inaccurate information, i used words like " I think i know" and "From what i understand". Not concrete facts. Hope this helps though. :D

[El Camexican]

Unless you are registering it for the street I’d pitch it, but if you really want one I recommend a unit Trailtech sells called the Endurance II for about $70 bucks. You mount a magnet on your front disk and a pick-up on your caliper. Some models are a bolt on, but for a trike you’d likely have to do some drilling and tapping. I held back on getting one of these for my enduro bike for a few years choosing instead to keep replacing cables and odometers with OEM parts. Big mistake on my part!!! I spent 3 times what the Trailtech unit cost just to maintain a functioning odometer. Now I have a speedo, two adjustable trip odometers, top speed memory, average trip speed, (great for bragging rights if your buddy has the same unit!) clock and maintenance schedule options. You can hard wire it, or change a battery every 1,000 hours of use (it only comes on when the front wheel is moved) and you can program the speedo based on your exact front wheel diameter. After that if you still think it’s off you can easily just use a slightly larger or smaller diameter for your wheel and recalculate it. Mine seems to be within 1 mph after the first attempt to set it. If you want a speedo on something that was never intended to have one this is the way to go.