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Koso Digital Speedometer

daddynia

daddynia

Veteran
haen said:
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..
Click to expand...
bro haen, if i'm using 90/80 tyre...whatis the correct calibration i need to enter? i did post a video at youtube after i install the koso gauge..
 
joecast

joecast

New Member
if the reference tire size for koso meter is 70/90-17 at 100% then at 90/80-17 it would be 103.23 % as per calculation of the tire circumfirence.
 
joecast

joecast

New Member
wider mags and narrow mags will make the circumference differs a bit. the ans is no.. i doesn't matter what size your mags is... cause we only calculate the circumfirence of the tire... as for the gps, we can get different reading iterms of time and places, depending on the location of the satelites above cause were constanlty moving, thats why they put a % error of every gps item we sold.
 
mingomz

mingomz

Super Veteran
A couple of days from now, I will buy my KOSO digital meter.

Looking forward for your assistance on how to install Ü. hope it's has a friendly DIY manual.

Thanks.
 
daddynia

daddynia

Veteran
joecast said:
if the reference tire size for koso meter is 70/90-17 at 100% then at 90/80-17 it would be 103.23 % as per calculation of the tire circumfirence.
Click to expand...
thanks for the info bro...
 
john_carlo

john_carlo

Super Veteran
daddynia said:
liezel_anne22 said:
just sharing where i put the termo sensor

http://i633.photobucket.com/albums/uu57 ... 1286250861
Click to expand...
is it the where you drain the engine oil? do you need to customly when installing it?
Click to expand...
yes sir its the oil drain bolt i made a hole in the center and make a thread make sure to put a copper washers in the sensor to prevent the oil leakage also i put a nut in the other side of the sensor to make sure that no leakage will occur
 
hatred07

hatred07

Super Veteran
@ traxx

paps anong circumference ang 80x80 F at 90x80 R enkei mags ng sniper natin,
mahina ako sa math di ko masundan ang formula hehehe

thanks po!
 
2

2b1ask1

Super Veteran
bakit dun po sa video pag kastart ng engine nasa zero padin yun tacho? dba po dapat nasa atleask 1k rpm na yun pag idle?
 
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