weak spark - CDI problems ?

[Tainted-Meat]

For Suzuki Bike:
Katana series and Bandit series

SUZUKI GSF400 BANDIT
32900-10D60 – BB7258

SUZUKI GSX400 KATANA
32900-33C01 – BB7212

and etc..

32900-46D00
32900-10D00
32900-10D10
32900-10D20
32900-10D30
32900-10D40
32900-10D60 – BB7701
32900-10D60 – BB7217

Case Study:SUZUKI GSF400 BANDIT



If the primary pulse voltage is less than Vpp= 360v, then the voltage applying to the spark plug is very weak.As the result, your bike’s power is very weak.
After reconditioning of the CDI with performance kit, the primary pulse voltage will be greater than Vpp=570v.

Component view


Waveform view


Root cause: shorten the life cycle of key components due to high temperature inside of black box. For example, the initial value of capacitor is 10uF, it will change to 2uF after 3 years.

Advantages of performance kit:

15% more power as compared with original
shorten the pickup time
higher km/l fuel ratio


The main benefit of repairing a unit in contrast with buying a more expensive new one is an indication of the possible cause on the bike that appears from the partial broken electronic parts.

Original components list:

for SUZUKI GSF400 BANDIT 32900-10D60 – BB7258

C1 = 100u, 50v, 105 deg
C2 = 100u, 50v, 105 deg
C5 = 10u, 50v, 105 deg
C6 = 10u, 50v, 105 deg

Correction on 1 Feb 2008
T4= 2SD1976
T5= 2SD1976

V1 =
F1 =MURATA DSN6NC51H102Q55B

Hopefully , the above info may help all the owners who are able to fix it.



the site is worh a peak if you have digi odometers

taken from:
http://x9dashboard.spaces.live.com/