Author Topic: Spark doesn't show (Read 21518 times)

banditcilik · « **Reply #45 on:** April 07, 2005, 11:30:04 PM »

I really doubt that my problem is caused by fuel/air problem. Just before I do anything to the CDI I started the bike and it was OK, except for time consuming cranks it took to start.
Now I already got two capacitors replaced but the engine is still difficult to reach higher RPM. It starts instantly though.
I checked the sparks and wow it is clearly stronger than it was before.
I'm not yet installing new transistors since I just found out that it is quite expensive.

badidou · « **Reply #46 on:** April 11, 2005, 12:30:39 AM »

Is your byke working only with 2 cyl?

Bandit · « **Reply #47 on:** April 13, 2005, 06:18:21 AM »

I have check with a local electronic shop, the transistor on the CDI board is D1976 made by Hitachi and the direct replacement for D1976 is BU806.

This was check on their catalogue book, so its not hoax, however I am skeptical he told me BU806 is better than D1976. :blahblah:

Things I have change on my spare CDI board are

Capacitors

47uF35v (85deg c) - 2pcs
10uF40v (105 deg c) - 2pcs

10uF25v (85deg c) - 1pc near the kokusan

Transistor
BU806 - 2pcs

However when I installed this faulty spare CDI on the bike, it wont fire.

while the one on my bike fires up in 1 click.

There is 1 more transistor on the board, I can't see what is the part number, I will check with the electronic shop once I got it out.

banditcilik · « **Reply #48 on:** April 13, 2005, 11:30:02 PM »

Rob, sorry that I used to many space in this thread.
Thanks to all of you that contribute so many useful information to my problem. This morning I went to my office riding my B4. It went smooth as before. Apparently the answer to my last problem posted is that I should reattach gas supply aka gas tank. Shortly after I did that the abruption has gone. Bike start with only one push and I never has to replace the transistor (thanks again to you Bandit, I would like to keep your info. maybe for a future 'upgrading trial' I will replace those TR).
This board is so helpful, in fact I never get any help from internet that is so comprehensive as this board.
If you guys happen to visit my neighbourhood just contact in case I can help.
You guys rock!!