Honda CX 500 Forum banner
1 - 20 of 24 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter · #1 ·
I have a UK, Cx500 1980. Ran fine until it started to miss at about 5000 to 6000rpm. Can't go above about 55mph. I initially suspected fuel starvation and changed the air and all fuel filters to no avail. Then, having read some of the past posts figured I might have a stator problem.



The check for this, according to the Haynes Manual is to check the resistance on the wires which join at a block mounted under the seat on the rear mudguard. There are three blocks, one big and two small. The manual suggests checking only the big block starting with white to blue and white to green, However the big conblock doesn't have a white or a blue. So I assumed they must mean the big block and the smaller block which has two wires, white and blue.



My Big block has 2x4 = 8 terminals they are, on the top row, Light blue, blank, Light blue with red, Light blue with white.



On the next row they are, Orange, Green, Orange with red, Orange with white.



Using both the larger and the White/blue smaller block I got the following readings compared with the Haynes suggested tollerences.



White to blue, 77 to 95 ohms was found to be 172 ohms.



White to green, 387 to 473 ohms was found to be 286 ohms.



Orange to green, 95 to 116 ohms was found to be 112 ohms.



Light blue to green, 95 to 116 ohms was found to be was found to be 111 ohms.



Orange with red to green, 81 to 99 ohms, was found to be 92 ohms.



Light blue with red to green, 81 to 99 ohms, was found to be 96 ohms.



I took it from this that the stator had failed and ordered one on the net.



Problem was, I didn't realise there were more than one component in the alternator which had windings on. There was the Alternator stator, which I ordered, and the advance pulsar coil which I removed from the small alternator cover at the back of the engine/gear box 395 thinking it was the same thing.



Anyway, the problem is, which one do I need? the Advance pulsar stator or the Alternator stator or both? If I need to remove the alternator stator, do I need to remove the engine and split it and is this easy or require special tools?
 

·
Registered
Joined
·
18 Posts
Discussion Starter · #2 ·
The 2nd last paragraph doesn't make perfect sense. It should have read that the advance pulser was taken out and tested independently and registered a resistance of 395 ohm.s
 

·
Registered
Joined
·
4,104 Posts
The white to blue and white to ground are the usual suspects

and your readings strongly indicate a failing stator.

To be precise, not the whole stator. Just the two coils that power

the ignition.

Your options are a rewind ( engine out job)or fit an Ignitech



The advance coils at rear dont sound too healthy so

the Ignitech which doesnt need em, looks like a good option
 

·
Registered
Joined
·
4,104 Posts
yes and yes, oils quite normal



the one you ordered looks like an Electrex

Some people had a few probs with em but from what I gather it was due to

the charge coils chafing and grounding on the rear cover.

As your going that route, I suggest you take your time and do some test fits

to check theres no chafing before final bolting up.

I'm not aware of a source for new advance coils

the bike may not have quite the get up and go with out good ones.
 

·
Registered
Joined
·
18 Posts
Discussion Starter · #8 ·
I could always send the stator back and go with an ignitech.



Their web site doesn't look very user friendly, where can I order one from and do they come with clear instructions?
 

·
Registered
Joined
·
402 Posts
our forum here does a group buy it get the ignitech cdi units i have one in my bike it is awesome but my cam chain ate my engine
 

·
Registered
Joined
·
4,104 Posts
Thats the thing with CDI bikes

At this age the stators have always been an Achilles heel, the advance coils can quietly

go and let the bike run run but not quite as well as it should and the CDI boxes

are NLA new so you have to buy second hand and hope.



Even with an Electrex stator You still need a good CDI box and good working advance coils

for it to run at its best ( all other things being equal)

Mind you I had a CDI bike that ran great for nearly 6 years without any ignition probs

until I snapped the crank but had others that were struggling



At 30 odd years old its all a bit of a lottery.



Ignitech is dead easy to fit you'll see lots of info on them here
 

·
Registered
Joined
·
3,999 Posts
Thats the thing with CDI bikes

At this age the stators have always been an Achilles heel, the advance coils can quietly

go and let the bike run run but not quite as well as it should and the CDI boxes

are NLA new so you have to buy second hand and hope.


Actually, there is a replacement CDI that you can buy,,but it ain't cheap




http://www.regulatorrectifier.com/catalog/1978-1986-Honda-CX-500-CX500-CDI-Unit-83488



http://cx500forum.com/index.php?/topic/2134-does-ignitech-bypass-stator-on-a-cdi-bike
 

·
Registered
Joined
·
4,104 Posts
279 dollars eh? yer right it aint cheap

the last time I saw a Honda CDI for sale new it was

about £220

I wonder if they sell many, if any?.

DC CDI devices like the Ignitech which no longer rely on the stator and advance coils

have stolen a march on it.

I think you guys were paying about 130 USD for your Ignitech?

thats what, about 1500 Canadian ?

























I'm kidding ! I'm kidding !!!!
 

·
Registered
Joined
·
2,601 Posts
Saw a CDI go by on eBay at $100, tested good, expired with no bids. It's probably been relisted.



The pulsar coils they can hardly give away, you've almost got to ask someone that's pulling a bike apart if they'll remove and list them.



Have you tried the "white wire fix" on your stator yet to make sure it's the problem?
 

·
Registered
Joined
·
3,999 Posts
I wonder if they sell many, if any?.
Scooby bought one and someone left a review on the website so they must have sold at least two


If there were no ignitechs, we would probably think they were the greatest thing since sliced bread and be doing group purchases on them.



stolen a march on it.
????????????




I think you guys were paying about 130 USD for your Ignitech?

thats what, about 1500 Canadian ?
One dollar Canadian = 100 cents Canadian
 

·
Registered
Joined
·
18 Posts
Discussion Starter · #17 ·
Saw a CDI go by on eBay at $100, tested good, expired with no bids. It's probably been relisted.



The pulsar coils they can hardly give away, you've almost got to ask someone that's pulling a bike apart if they'll remove and list them.



Have you tried the "white wire fix" on your stator yet to make sure it's the problem?




I'll try the white wire fix as soon as I get a chance to put the bike back together again.
 

·
Super Moderator
Joined
·
15,414 Posts
I could always send the stator back and go with an ignitech.



Their web site doesn't look very user friendly, where can I order one from and do they come with clear instructions?




Or go with the ignitech and a cheaper g8 stator.
 

·
Registered
Joined
·
4,104 Posts
stolen a march on it.

????????????




Allan

I meant that in terms of developing alternatives to the standard parts

the 279 dollr item is basically a copy of the original and still relies on the

CDI stator and advance coils etc

More of the same really



The Ignitech DC CDI concept doesnt try to copy but leaps ahead with a more modern design and folk no longer have to rely on the flakey stators and advance coils.

and it cheaper too !!



Blindstitch

Yep, the G8 type stators are cheap and easy to get hold of and Eurovee even rewinds his own
 

·
Registered
Joined
·
3,999 Posts
stolen a march on it.

????????????




Allan

I meant that in terms of developing alternatives to the standard parts

the 279 dollr item is basically a copy of the original and still relies on the

CDI stator and advance coils etc

More of the same really



The Ignitech DC CDI concept doesnt try to copy but leaps ahead with a more modern design and folk no longer have to rely on the flakey stators and advance coils.

and it cheaper too !!


Reg,

I gathered that was what you meant,,kinda like music CD's stole a march on cassettes,,,,

but I had never heard the saying before. You English people have a word for everything
 
1 - 20 of 24 Posts
Top