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After market speedos
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A couple of threads on here recently have reminded me that I meant to do a quick review of the 2 digital speedometers I have on my TTRs.

My OE 325 had an engine transplant that didn't have a speedo drive on the output sprocket so I went for a Trail Tech Endurance II. This is the smallest of the Trail Techs - no idiot lights, rev counter or other whizzbangs like temperature or gear indicators. I initially used the ttr idiot light cluster, but later made my own and it looks like this:

3 fiddy 012.JPG

It reads the speed from a simple sensor attached to the forks which counts the wheel revolutions via a magnetic headed brake disc bolt:

bandg 006.JPG

The other bike (the black one) has the smallest available Koso digital gauge, which in addition to the basic features of the TT, has idiot lights incorporated:

3 fiddy 011.JPG

Although most of the larger Koso speedos seem to use a similar pickup to the Trail Tech, the smallest one uses a live sensor like an abs sensor and this was much more fiddly to fit. I ended up shaping the bottom lug of the brake caliper mount with a burr (like a really good Dremmel tool) and drill and tap a thread to make a clamp:

bandg 005.JPG

This again reads off a magnetic brake disc bolt.

Whilst it looks a bit more vulnerable, my brother hasn't knocked it off yet!

Both speedos work perfectly well at their job of telling you the speed. The TT did some funny readings when first fitted but settled down ok. May have been to do with the connections - the wires are really thin on both speedos. If you've been paying attention, the Koso started playing up in cold weather - switching itself on in subzero temperatures in my garage. I finally traced this to a faulty ignition switch! Nothing to do with the speedo, and it actually helped me spot a problem I might not have noticed otherwise (saw the backlight glowing in the dark one night)

Both are similarly priced (at least here in the UK) and well matched. The Koso loses in the final round though because of the fiddly sensor mounting, and although it has lights for the neutral, mainbeam and indicators, they are not bright enough/large enough to see in daylight. Maybe the larger models are brighter? I just wanted to fit the smallest most discrete speedo I could find. The bike now has an audible indicator buzzer a la TTRFan's mod.

Anybody used any of the other electronic speedos available? I'm interested in your findings.

Ride safe all (and don't spend too long looking down!)

Simon.

 



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Guru

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same as i bought simon the trailtec endurance good bit of kit £79.00 why bother with a speedo from a 1996 bike that is going to be troublesome

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Excellent info Simon!

Just a thought though. A lot of Road Angel 7000 owners are ditching them in favour of newer SatNavs or are using phones instead. This means there are a lot of them around and they often sell for next to nothing on eBay.

The RA has a good speed display and it will always be accurate as it is driven by the satellites wink

The really cheap RAs are ones with dead internal batteries but that shouldn't concern you if you just use it as a speedo. You just need a 5.4v feed (cigar lighter or whatever) that is switched so only on when the ignition is on biggrinbiggrin

Road Angel speedo display.jpg



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Brilliant, and thanks for the info. Am i right in thinking your ttr is the blue one which had an analogue speedo? Mine is a 1994, with the digital one fitted. There does not seem to be a great deal of clearance for the magnetic bolt fitted to the disk. How much clearance is on yours?

Mike

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That's a handy tip Brian.
Mike, my bikes are both Open Enduros. The M6 magnetic bolts supplied with both Koso and Trail Tech are barely deeper than the original disc retaining bolts and there are no clearance issues.

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Thanks Simon. Glad to hear that as there is very little clearance there.

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If I need just a speedo with trip, etc I use a cycle one. The pick ups are the same and as an aside they can be spliced straight into the original wiring on KTMs. There are I believe wireless ones about now but I have not needed to fit one for a while so cant comment on their reliability. They usually come calibrated to a 21" wheel too which is handy but this can be changed. I use a Montana now as the poor old eyes gave up on the etrex I was using but the advantage of that is you can configure the dash to show speed, I do this in France in km/h to avoid the hidden gendarme speed traps.

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hi herman my son needs a speedo on a trials bike a cycle one have you got any links prices you can recomend please

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Hello, I honestly walked into my local friendly Halfords and picked a digital one up for around a tenner I believe. You do pay a bit more than the ebay same item but at least if it is pants you can take it back. This kind of thing www.halfords.com/technology/wearable-technology/cycling-computers-gps/halfords-10-function-cycle-computer I subscribe to the K.I.S.S. school of tech.



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Hi, Fitted Trail Tech Vapor to the TTR the other week, using original/modified idiot lights.  Yellow tape part is spare clutch cable.

sp-1.jpg

 

sp-3.jpg

 



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It is basically cutting existing idiot light bracket along the square light section, making the large hole slightly larger to accomodate the wires and lining up the speedo and drilling accordingly, and making a small bracket to attach the whole thing to the handle bar clamp.

It appears to be the same physical size as the Striker

Mike.



-- Edited by micccki on Monday 26th of February 2018 05:29:10 PM

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