Gixxerthou Posted May 29, 2009 Report Share Posted May 29, 2009 Alot of us with TL's have changed gearing from stock. I went +2 (41) on the rear sprocket. Because the TL's speedo reading comes from the countershaft sprocket any change in gearing affects the speedo and the odometer. For an accurate speedometer I've installed a Sigma Sport 1200 bicycle computer. Not only does it give you the acurate speedo it also gives you Max Speed, Avg Speed, Trip Distance, Total Distance, a lap timer (stopwatch) and a clock which comes in real handy. It was quite easy to install, took 45 minutes. You need to buy a small round ceramic magnet, I got mine from Radio Shack, $1.49 for 5 of them. I epoxied one of the magnets into the hole where the rotor center meets the rotor using a standard 2 part epoxy. Then I mounted the sensor on the inside of the fork leg. I used velcro on the fork leg and on the back of the sensor. See pics below: Close up: Then I ran the cable up the left fork and mounted the base unit onto the mirror brace with the supplied rubber band and a small piece of 5/16 OD gas line underneath it. That's all there is to it. It works great. Copyright The Thumperzone 2008 Link to comment Share on other sites More sharing options...
Gixxerthou Posted June 1, 2009 Author Report Share Posted June 1, 2009 works out about £100 cheaper than a speedo healer that I once bought from BlackBox Robotics in Oz. Bargain Link to comment Share on other sites More sharing options...
diogo Posted August 25, 2009 Report Share Posted August 25, 2009 but from what I've read from it's specs it only reads up to 50 km/h???? is that correct? Link to comment Share on other sites More sharing options...
rich7/12 Posted August 26, 2009 Report Share Posted August 26, 2009 but from what I've read from it's specs it only reads up to 50 km/h???? is that correct? Nope - all Sigma's read up to about 183mph (or something heady like that) - I've a Sport 1600 on mine. Link to comment Share on other sites More sharing options...
lorenzo Posted August 26, 2009 Report Share Posted August 26, 2009 I got the cheapest sigma I could find (£9.95 I think) and it stayed within 0.5mph of my sat nav up until about 120, which is good enough for me. The lady in the bike shop wondered what the fuck I was doing when I asked her if they worked past 70mph. I think the limit to them is the fact that the first digit, the one that does the hundreds, isn't capable of doing anything other than a 1, so 199 is the max it'll go to, either in metric or imperial. I don't know what speed they're accurate too, but the answer is probably 'enough'. Link to comment Share on other sites More sharing options...
diogo Posted August 26, 2009 Report Share Posted August 26, 2009 both your repplies are enough to me...so I just bough one too I went for the BC506L simply because I liked the design of it (omg I'm such a poser...:S) since I'm using a TL front wheel there goes the speedo :S....and since my last bikes didn't had a speedo too I find this a really cheap and great alternative Link to comment Share on other sites More sharing options...
DougW Posted October 18, 2016 Report Share Posted October 18, 2016 Father In law has gone for a wireless GPS Garmin bicycle and reckons its great, this is on a 1960`s 250 two stroke so not sure about reaction time and speed capabilities ! Link to comment Share on other sites More sharing options...
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