1985 CR500RF Rebuild

[Hoony]

i have just managed to track down a pulse coil and it should arrive mid next week. this hopefully should solve my no spark issue, its got me stuffed as it ran before i pulled it down. i have swappped the CDI and Ign' coils that i have spare to no avail.

Anyone really good on bike electrics? i have checked resistance of all coils and they are all within spec, output of alternator is ok. so this is why i suspect a pulse coil.


Anyone know how to test a 2 wire pulse coil other than resistence check ?
are they a like a proximity switch ?

[VMX Andrew]

a pic of another big red at full song....

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[VMX Andrew]

quote of the day from my 5 year old son when i was workin on my CR500RE yesterday...mind you when he said it he was sittin on his pw50 practicing pullin supermans and can cans right beside me...(dad why do you always buy wrecked bikes) cheeky little bugger...

[marshallmech]

hey hoony check your getting a good earth.

[YSS]

Hoony did you fall for the old powder coating trick?  Scratch some paint of somewhere  and very likely you will get earth and spark 

[Lozza]

Best earth is to run a separate wire from the coil to the stator plate.Off the trigger a 0-4V peak signal is OK

[Hoony]

Thanks Guys for the input, yes i have a good earth and no i did not powercoat frame.

pulse coil should arrive on wednesday so i will have another crack at it then. A big pissed off at present and i will wait for my frustration to subside before i attack it again.

Lozza, thanks mate i will check output for 1-4 V (i assume this is an AC voltage)

[VMX Andrew]

here hoony this pic might cheer you up mate.... its david baileys factory honda RC500 84 model...

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[YSS]

Sorry to high jack , but I have this Suzuki Ignition Test Kit that we never use .
Any one interested ? I am open to offers.

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[Lozza]

Normaly DC*, How about a swap for a carton Walter


* Relying on my dodgy memory

Here are the specs for a CR 480 will be very similar

Trigger coil Blue to green wires, 21-25 ohm, 5 Vpeak
Low Speed coil white to green wires 100-120 ohm 120 Vpeak
High Speed coil White to Red wires 21-25 ohm 15 Vpeak

[Hoony]

forken thing.

pulse coil arrived, still no spark. it has to be the stator breaking down as i have spares for all other items.

Boy am i pissed off. i will have another go tomorrow when i cool down.

[yzhilly]

Whats the plan now Hoony ?. I'm just about to start loading the trailer for broadford hope the rain holds off.

[DJRacing]

Dont ya just hate electrics. I hope you get it going soon Hoony.

[VMX Andrew]

how did you go hoony...you get her goin...im not goin near mine until i get some new boots..after kickin the beejeezuz out of mine last weekend me boots just fell apart...

[Hoony]

no joy as yet guys. i have sourced a stator from ebay and hopefully and i maen hopefully i will get it from the US by next weekend as the Viper Social day is on. if not i will ride the 250.

I am very dissapointed at present, i either have 2 faulty CDI's or its the stator. time will tell.