BIKERS ADVENTURE GROUP MALAYSIA

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

Sigma bicycle trip computer
http://www.sigmasport.de/us/produkte/bikecomputer/topline_wired/bc1606l/

How it is done on motorcycle
http://www.canyonchasers.net/shop/generic/sigma.php
http://mywebpages.comcast.net/billingsley/sigma.htm
http://www.angelfire.com/ia/z/FZ1sigma.htm
http://www.fjrtech.com/getdbitem.cfm?item=27 (this site offers detailed installation)

Price range about RM70 for 906 to RM90 for 1106 to RM130 for 1606L

906 would suffice but 1606L got smart backlight .. nice for night riding

I probably would install a 906 on my bike.
My Bike not so high-tech so the little trip computer can be useful for long journey

Kenny

rashid · Joined: 26 Jul 2007 Posts: 66 Location: shah alam

ken,i may join you if it is workable on my peg,esp my speedometer has jammed up,thus only estimating on what rpm in what gear...

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

I installed it yesterday
Took about 45 min ..
Now I have
Speedo (not that I need it) calibrated to actual tire condition
Average Speed
Maximum Speed (so can brag about how fast I go)
Trip distance (useful for Rashid as his odo and speedo is cracked)
Total Distance (useful to keep check of service interval)
Trip Ride time
Total Ride time
Clock

Total cost
Sigma BC906 (www.sigmasport.com) RM70
Magnet from GIVI used for tank bag RM10

You can actually use any strong magnet .. like the one from mini headphones but I have that spare GIVI Tank Bag magnet in my tool box.

Here the pics

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

Rash,

Really simple thing to install
You have all the information you need to replace the crack od/speedo for less than RM80 !

Any good bicycle shop sells it
google "sigma bicycle trip computer installation on motorcycle" or something like that ... a lot of motobikers got it installed and gave thumbs up
afterall it is cheap thrill for so little investment

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

modified my installation today
cannot tahan the white cable tie
so changed to black and looks so much better
I also experiment with a cheap magnet from
the hardware shop .. the one found in the door magnet
It small and powerful enug and cost RM1 !!!
and works
Got it epoxy-glued to the disk already ..
would be buying a spare to put in the bike juz in case the one installed falls off

picture tomorrow
+
part 2 --
on calibrating that devil

rashid · Joined: 26 Jul 2007 Posts: 66 Location: shah alam

ok if thats the case i want one,get one for me..pleaaase

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

why not u find it at a reputable (ie selling better models) bicycle shops
should have a few in Shah Alam or even in Klang
try the shops in the link below

http://www.lerun.com.my/dealer-rodalink.html

http://www.bikeprobicycle.com/

http://bikeshops.mtbr.com/cat/around-the-world/asia-and-pacific/asia-and-pacific-other/bikeshop/PRD_370365_6219crx.aspx

http://www.velo4.com/

http://www.eguide.com.my/productservice-174-bicycleshops-Malaysia,Asia.html

cheers

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

Part Two

Calibration and Testing

I Replaced the cable ties with black ones

Of course the position of sensor varies but do secure them properly with enough force to hold them in place

Sensor Magnet
I used the magnet from the hardware shop that cost RM1 with great success. Small and powerful enough to register proper readings

Note: ditch (keep la) the supplied magnet as it is not strong enough as the distance between magnet and sensor is more than 5mm. The supplied magnet/sensor cannot be fixed more than 5mm apart

Calibration
Sigma Trip computers allows very precise calibration of wheel sizes
You can calculate the wheel circumference via

measuring the length the wheel travels in one full revolution
or
calculate via the diameter of wheel (rim+tire) x 3.14 (that phi)
input the value into the setting in 'wheel size'

HOWEVER
I got the little computer to give some 15% below the reading given by my bike speedo

FINE-TUNING

Option 1
Ride the bike with road side mile markers
take note how much it give vs the actual mile (or km) traveled/rode

Option 2
Ride at steady speed ie 20km/h then 30km/h then 40km/h
Take note of speedo readings and Sima's readings
Take the difference example

Setting in computer 1620
Reading in Speedo 30km/h
Reading in Sigma 27km/h

Then you should adjust value = (30/27) x 1620 = 1800
to be re-entered into Sigma

Option 3
Take Bike's odo (trip) meter reading
Do same for Sigma reading
Compare the two and adjust as Option 2

Please note that the bike's speedo is calibrated for fresh tires
worn out tires (lower circumference value) give wrong readings

I am done with my bike with value set to 2040 to sync with my bike's speedo which theoretically is 10% higher compared to calculated values

Actual value should be 1840-1850 for most 120-70R17 wheel size depending on tire depth and rider/bike weight

Here the FINAL view from the rider position

klpegaso · Joined: 25 Jul 2007 Posts: 217 Location: Tmn Melawati

Dearest

Does it have a clock and can the unit be removed for safekeeping. I am more interested in the clock.
_________________
What? Me Worry?

rashid · Joined: 26 Jul 2007 Posts: 66 Location: shah alam

i had tried at lee run,dont carry this brand,has the more expensiv ones,start at 85 up to 200rm.Where didyou buy?

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

List price is about RM89 so street price should put it at RM68-RM70 or so
I can buy it for you but I would only go to the shop next week Wed as it is near my son's tuition centre.

Yes, it can be removed for safe keeping and it comes with a clock function with numbers BIG ENOUGH to see while riding

BTW,
Local distributer for SIGMA Products is
KSH Bicycle Sdn Bhd
3 Jalan SS2/3 PJ
Tel 03-7877 0450
Mr Yap

rashid · Joined: 26 Jul 2007 Posts: 66 Location: shah alam

okay,pls buy one for me,i guess it's better to use the same proven set,easy back up.you may let me know when going ,i may meet you there.

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

next week then
as I go there Tmn Len Sen . that's 20 min from my house
on wed to send my son to his class in the evening

rashid · Joined: 26 Jul 2007 Posts: 66 Location: shah alam

i just receive reply fro bike pro,they only handle cateye and garmin,but they give NG remarks on Sigma.

I feel that my exhaust is too loudd,do you think there is another unit around of the same model,i want to add one more.

kennylee · Joined: 25 Jul 2007 Posts: 348 Location: Cheras

rashid
sudah beli

so need deliver to you and hopefully you come with your bike
I show you how to install it and calibrate it to your wheel's size