Koso Digital Speedometer
- Thread starter skuter
- Start date
kilbz
Super Veteran
give it to me, i will teach you how to install 
installation is pretty straightforward for this meter since the details are well explained on the manual.. every cable is labeled..
but one thing still bugging me..
the RPM wire cable supposed to be connected / jumpered to the white pulser cable on the CDI.. but it gives inaccurate rpm reading.. it doesnt read anything under 3000 rpm..
http://www.youtube.com/watch?v=Ap4tAXlAjdY
one of the Malaysian user said connect it to the ORANGE cable.. which gives quite accurate reading.. although seems it still need rpm signal filtering..
also about tyre calibration.. i found for 70/90 tyre size the 100% setting is quite accurate contrary what was written on the manual.. (looks like it was a copy paste from a matic manual since tire size is about 14" rim)
doing some manual calculation :
70/90 tire size means = tyre height = 70 * 90% = 6,3 cm
add to 17 inch diameter = 17 x 2,54 cm = 43,18 cm
plus tyre height = 2 x 6,3 cm = 12,6 cm so total diameter of the tire is 43,18 + 12,6 = 55,78..
so.. total tyre circumference is = 3,14 x 55,78 = 175,1492 --> 100% value on the speedo
for 80/90 tyre i use 103% just do the same recalc as above..
i tried both method (using that calc above and doing a tyre roll measurement on the floor using a meter) and the results are about the same..
but one thing still bugging me..
the RPM wire cable supposed to be connected / jumpered to the white pulser cable on the CDI.. but it gives inaccurate rpm reading.. it doesnt read anything under 3000 rpm..
http://www.youtube.com/watch?v=Ap4tAXlAjdY
one of the Malaysian user said connect it to the ORANGE cable.. which gives quite accurate reading.. although seems it still need rpm signal filtering..
also about tyre calibration.. i found for 70/90 tyre size the 100% setting is quite accurate contrary what was written on the manual.. (looks like it was a copy paste from a matic manual since tire size is about 14" rim)
doing some manual calculation :
70/90 tire size means = tyre height = 70 * 90% = 6,3 cm
add to 17 inch diameter = 17 x 2,54 cm = 43,18 cm
plus tyre height = 2 x 6,3 cm = 12,6 cm so total diameter of the tire is 43,18 + 12,6 = 55,78..
so.. total tyre circumference is = 3,14 x 55,78 = 175,1492 --> 100% value on the speedo
for 80/90 tyre i use 103% just do the same recalc as above..
i tried both method (using that calc above and doing a tyre roll measurement on the floor using a meter) and the results are about the same..
sniper135lc
Super Veteran
i am not sure but how bout we connect it directly on ignition coil to that it can read accurately the rpm. i am correct any effect if i just connect it directly?
( If you can, show me some pic. 
express unlimited
Super Veteran
subscribing....
doraemondizon
Super Veteran
so easy to kabit..
lahat pwede paganahin..
lahat pwede paganahin..
sniper135lc
Super Veteran
bro any update after you jumper it on the orange cable? no problem ecountered on the cdi unit?haen said:
did you connect rpm in orange wire?
the manual says the rpm must be connected to the WHITE (pulser) wire in cdi.
whats the purpose of orange wire?
TIPS:
instead of using the midway connector for rpm.
its better to directly solder it in the white wire.
why?
because theres a chance that midway connector
will cut 1 or 2 strands of your white wire
when you use it. as times goes by if you remove
or moved the cables, it will flex and cut again additional wires.
or it will not connect correctly if its pressed lightly
thus providing inaccurate rpm.
i do suggest to solder it directly the rpm sensor wire to white wire.
thats what i did and runs perfectly!
@haen
ive done GPS testing with koso.
GPS TIRE CIRCUMFERENCE SETTING: 100%
FRONT TIRE: 90/80x17
Readings:
Koso speed: 137 kph
GPS Nokia N82: 133.2 kph
GPS Holux M1000: 135 kph
so a 90/80x17 tire front and
100% setting tire circuference on koso meter
will have 2% advanced inaccurate to REAL GPS SPEED
Heres a sample of the koso meter in action using tire circumference of 100% on 90/80 tire
[flash width=480 height=385]http://www.youtube.com/v/mxX3QYTTGW8&hl=en_US&fs=1[/flash]
FOR ACCURATE GPS SPEED :
use the ff setting:
90/80x17 front tire= KOSO TIRE CIRCUMFERENCE 98%
mine i set tire circumference to 100%
the manual says the rpm must be connected to the WHITE (pulser) wire in cdi.
whats the purpose of orange wire?
TIPS:
instead of using the midway connector for rpm.
its better to directly solder it in the white wire.
why?
because theres a chance that midway connector
will cut 1 or 2 strands of your white wire
when you use it. as times goes by if you remove
or moved the cables, it will flex and cut again additional wires.
or it will not connect correctly if its pressed lightly
thus providing inaccurate rpm.
i do suggest to solder it directly the rpm sensor wire to white wire.
thats what i did and runs perfectly!
@haen
ive done GPS testing with koso.
GPS TIRE CIRCUMFERENCE SETTING: 100%
FRONT TIRE: 90/80x17
Readings:
Koso speed: 137 kph
GPS Nokia N82: 133.2 kph
GPS Holux M1000: 135 kph
so a 90/80x17 tire front and
100% setting tire circuference on koso meter
will have 2% advanced inaccurate to REAL GPS SPEED
Heres a sample of the koso meter in action using tire circumference of 100% on 90/80 tire
[flash width=480 height=385]http://www.youtube.com/v/mxX3QYTTGW8&hl=en_US&fs=1[/flash]
FOR ACCURATE GPS SPEED :
use the ff setting:
90/80x17 front tire= KOSO TIRE CIRCUMFERENCE 98%
mine i set tire circumference to 100%
@traxx : i connect it to the white wire (pulser) and the result is just what the video shows, erratic behaviour.. its not a connection problem since i've already hardwired it..
anomalies i've found :
1. that orange wire gives more accurate signal (i asked mr. Vincent Tsai from KOSO TAIWAN about this and he suggests the same thing IF the WHITE WIRE doesnt work)
2. The turn signal light got reversed incorrectly in our wiring harness e.g : Left became Right and vice versa. Did u Sniper users got this kind of problem too ?
3. Regarding the GPS measurement, so far mine on 80/90 - 17 got it correctly on 103% compared with two GPSs same as yours traxx
N82
and
iGO GPS
if i set it on 100% i got slower about 3-4 km/h compared to GPS.
4. THE MOST ANNOYING is the bolt size of the temp sensor, why they give big size compared to 10 mm plug on the oil and water check bolts on the cyl head and block.. this requires us to get additional accessories from KOSO like that Water Temp Sensor Adaptor.
anomalies i've found :
1. that orange wire gives more accurate signal (i asked mr. Vincent Tsai from KOSO TAIWAN about this and he suggests the same thing IF the WHITE WIRE doesnt work)
2. The turn signal light got reversed incorrectly in our wiring harness e.g : Left became Right and vice versa. Did u Sniper users got this kind of problem too ?
3. Regarding the GPS measurement, so far mine on 80/90 - 17 got it correctly on 103% compared with two GPSs same as yours traxx
N82
and
iGO GPS
if i set it on 100% i got slower about 3-4 km/h compared to GPS.
4. THE MOST ANNOYING is the bolt size of the temp sensor, why they give big size compared to 10 mm plug on the oil and water check bolts on the cyl head and block.. this requires us to get additional accessories from KOSO like that Water Temp Sensor Adaptor.
blueblink182
Super Veteran
hello po!mga paps ask lang po kung magkano? and san makabili?