[cassos]

Guys, I just received my Trail Tech trip computer kit for XR/CR http://www.trailtech.net/motorcycle.htm and getting ready to install it on my XR400 with the Motomaster Supermoto street/Sportsman kit http://www.moto-master.com/engels/brakediscs/smstreet.html. It looks like I will not be able to use the replacement magnetic rotor bolt, but I will have to stick the spare neodymium magnet. Did anybody else install it on these Motomaster aluminium alloy adapter bracket, where did you drill?

 

[phlat65]

I made a small bracket to bolt the pickup to the pinch bolts, with the sensor pointed at the magnet. I used some quick set epoxy to attach the magnet to the hub on the non rotor side. has worked like a champ for 5,000 miles. I did the measure the rolling distance of the tire to get the input number, but found the speed to be WAY off. (measured 5 rotations and divided by 5) I just paced a buddy, and changed the # until close. Rode by one of those "your speed" things @45 indicated =46 on the radar readout. :thumbup:

 

[blueblack]

i just sandwhich it between the fork and motomaster bracket. Then just place the magnet on the brake disc.

 

[cassos]

Thanks for the tips, I will mount it this weekend, I might try the "sandwhich" method first, easy to try did you use the upper or lower bolt for that "sandwhich"? did it offset the bracket too much? and un-even? I'll post pics when I am done, do you guys have any before I start? Cheers.

 

[blueblack]

i sandwhich is inbetween both bolts. I guess the mounting point is very different between a WR and XR, here's a picture. I'm kind of geitto on this.. hehehe

http://www.imagestation.com/album/?id=4285880501&p=4146813623&idx=28

 

[cassos]

No simple projects...

As usual, there are no simple projects, the Trail Tech is now working great, but I have a few lesson learned that I would like to share if you get to install one. First TrailTech has a great FAQ http://www.trailtech.net/faq's.htm, among which: “How can I be certain the magnet and sensor are lined up correctly”. The diagram showed the sensor/cable assembly perpendicular to the magnet path and above the magnet path. I drilled a 1/8 hole and installed the trailtech sensor/cable assembly at the bottom of the MotoMaster relocation bracket (see picture) so that it is protected and easy straight wiring of the cable alongside the brake hose (I knew it was not perpendicular to the path). I then used the magnet bolt on the rotor and could get a pulse when spinning the wheel, so far so good. First bad news, I broke the magnetic bolt head, before I even had a chance to pick my torque wrench…they gave warnings, but boy they are fragile. Well, I then used epoxy to glue one of the provided magnets to the brake rotor. I was happy and went for ride to find out I was getting a double pulse (as they warned us…). I had to break the epoxy, and glue the magnet as low as I could (see left of the fork on the photo). So, first big lesson, don’t put the sensor/cable assembly were I did, I think and ideal location would be to drill on the “-“ of the SM-101 mark. As for the display unit, I simply tied it on top of my original odometer (I still want to be able to convert the bike back to dirt riding quickly). Finally, in theory, a 120/70 tire on a 17” wheels has a circumference of 1884mm, in practice you have to take into account the tire pressure and all sorts of crap. I measured ten rotations of my front wheels on my driveway, and came up with 1850mm which seems to about right (I mounted Kevin’s GPS on my handlebar to verify it…). That’s all folks…

 

[omegas]

Just to warn you, the trailtech does not like vibrations. Try to find a way to coshion it. I killed mine in 3 months on the road. When you shake it, something raddles inside now.

 

[cassos]

Just to warn you, the trailtech does not like vibrations. Try to find a way to coshion it. I killed mine in 3 months on the road. When you shake it, something raddles inside now.

I think I read that comment from you before, how was it mounted when it broke from vibration?
I thought I would avoid vibration by mounting the TrailTech on top of the existing Odometor beacuse it is itself rubber mounted (plus I also inserted rubber in the Trailtech mounting brackey). Should I worry?

 

[omegas]

you should be fine, mine was mounted directly to the bars with a metal housing and no cushion.