quality cdi's

belldude · #1 08-21-2009, 06:56 PM

Hey there. I have gone thru 2 cdi's now and am wondering if there is anyplace that one can purchase a better quality cdi to work with the 2stroke motor?

Cabinfever1977 · #2 08-21-2009, 08:12 PM

are you sure its hooked up right or maybe your mag is blowing them.

**Norman** · #3 08-22-2009, 09:52 AM

Don't know if your doing this or not. Keep your bike out of the rain if you can a little silicone on where the wires to the cdi come out (sealing that area might help on the cdi) I don't know of a better cdi.
Norman

Pablo · #4 08-22-2009, 12:12 PM

Quote:

Originally Posted by Norman

Don't know if your doing this or not. Keep your bike out of the rain if you can a little silicone on where the wires to the cdi come out (sealing that area might help on the cdi) I don't know of a better cdi.
Norman

THAT IS AN EXCELLENT TIP.

I noticed on very moist days my engine was having some issues, even when warm - I could not attribute the sluggishness etc to the fuel or anything else. As soon as it warmed and dried, bike went like a raped ape. So I decided to pull the wire and goozed it up with silicone grease and threaded it back in. Problem went away completely.

To the OP - how do you know your CDI is crapping, and do you try to fire it up with no spark load?

EnFlaMEd · #5 08-26-2009, 03:47 AM

HP CDI Ignition Box

How do people pull the wires or change the wires on their CDIs? Mine is completely sealed and does not look user maintainable. The wires do come out of rubber boots but these are totally sealed in.

Bikeguy Joe · #6 08-26-2009, 07:07 AM

Our CDI's are sealed in epoxy and are non serviceable.
As far as I know, there are two CDI's- 2 wire and 3 wire.....but they aren't cheap.

Hasn't anyone experimented with a box from a motorcycle?

I have never had a CDI problem, so I have not tried anything else.

**Norman** · #7 08-26-2009, 01:47 PM

Your cdi's only wire that is removable is the spark plug wire it unscrews just like a cheap wine bottle cap lefty loosie righty tighty. Both ends of the spark plug wire unscrews cdi's end and the spark plug boot end.
Or like a pop bottle cap/ water bottle cap, if you have never messed with wine or pop.
So far I've never had a cdi that didn't work.
Norman

Bikeguy Joe · #8 08-26-2009, 06:34 PM

Those HP boxes look like they have a good wire, but other than that just an expensive chinaunit.

noco · #9 09-29-2009, 03:43 PM

hey norm...have you ever heard of someone using a real cdi...what we are calling a cdi is just a coil pack...i was thinking of trying a cdi from a 2 stroke scooter....the one i found had a b+,b-,coil power and ground(primary igition),and 2 wire to the mag for a tack signal...this one is actually electronic i think...im really asking this because i was interested in variable spark timing...any thoughts???

**Norman** · #10 09-30-2009, 09:37 AM

Noco
It's your money if you want to spend it on one thats up to you. I don't know if it will work or not.
Have you ever put a timing light on one of these engines? I have the timing doe's change with
the rpms. these so called cdi's that are on the china bikes do have more than just a coil in the little black box by the way.