Cagiva Mito no spark

[davthegreat]

Hello everyone, I have a Cagiva mito evo 2000 and I cannot get a spark from it ? any help would be much appreciated.

I have done a google search and a search of these forums and cant find anything of help.....

There is enough power in the battery as I have been trying it with another power source strapped onto the battery therefore power from the battery is not the issue

Also I have obviously took the spark plug out the barrel and have it resting by the side of the barrel looking for the spark?

I have checked nearly all the leads, connectors, fuses ect and have not found the fault there, but dont know what to do now?


Thanks
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1st (derbi senda 50)
2nd (mito which is in bits )
3rd (kawasaki kh125 "83")

[jimmyRS]

Have you tried a different plug?

Have you taken the cap off of the HT lead, cut the lead back about 1cm then recrewed the cap back in? Same for CDI?

Do you have a DMM at hand to check your getting any current through it at all?

[MaybeGuy]

have you hotwired it?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Kickstart]

Hi

When testing for a spark you need to make sure the plug is touching securely something that provides a good earth (normally the engine). Make sure it is really on the engine, not just close.

Well worth triming a bit off the HT cable as suggested above (on many systems the cap and the coil have what is basically a self tapping screw poking out, and the cable screws onto this self tapper - and the copper cable eventually breaks up on the self tapper making it a poor connection).

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[davthegreat]

thanks for your help guys,

Its a Brand new spark plug however I can always get another just incase its a duff one ill see what I can do tomorrow. jimmyRS and kickstart great idea I will cut back the HT lead tomorrow to see if thats the problem.

Also when looking for a spark I made sure it was touching the head therefore earthing it.

Im not sure what a DMM is, if you mean a muilti meter I do but not sure where to test from (where to put the prongs of the multi metere)......

mattsprattuk, hotwired ?


cheers
____________________
1st (derbi senda 50)
2nd (mito which is in bits )
3rd (kawasaki kh125 "83")

[Kickstart]

Hi

You check the resistance over the 2 circuits and compare it with what it should be (from the manual).

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[jimmyRS]

Yeah either test the resistance of the circuits or use the half-split method to locate your fault (Earth at one end of the circuit, or just earth it, and use the live to see where the connection actually makes it before it stops)

Try using one of the cylinder head bolts for earthing, ive tried earthing on the head/barrel/frame before and i find the cylinder head bolts work a charm and nice and easy to see the strength of the spark aswell.

If you try all this still to no avail, try a different CDI. Shouldn't be much to buy second hand off a scrappy or ebay

[davthegreat]

Hello again

ok today i cut back the HT lead and everything seem to be ok with that also tried another spark plug still no spark, then I took the coil off the bike and tried a 12v supply on it and still couldnt get it to spark ? does this mean the coil is gone ? and is there a way to test the coil ?

also when you say test the 2 circuits how do you mean exactly test where ?

how I understand this is as follows:

Battery>CDI>Coil>Spark plug ? is that correct ?


Thanks for all the help
____________________
1st (derbi senda 50)
2nd (mito which is in bits )
3rd (kawasaki kh125 "83")

[Kickstart]

Hi

The coil is essentially 2 coils of wire. One is the low tension side and connected to the battery. Power through this builds up a charge in the other coil on the high tension side. When the power through the LT side is interupted the charge in the HT side is discharged via the spark plug to cause a spark.

As such you can check the resistance over each of those pairs of coils to check they are within specs. The manual should give you the specs and where to check on each circuit.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[jimmyRS]

well its a bit more indepth than battery > cdi, I could be talking crap here but i know with my RS its fed through the cdi > ht lead > spark plug cap > spark plug

jus checked and yeah the coil is after the cdi on yours, my bad ^^

Have you tested the CDI? And how are the lights, or the electrics as a whole, do they work? Could eliminate any problems with earthing, but i know with a lot of italian stuff that the lights wont come on unless the engine is

One problem i had with a very very weak spark was the stator had gone. Literally wasn't building up enough to create a decent spark strong enough to barely see let alone fire up the bike.

While your at it take a reading off the battery and see if its still pushing more than 12v, keep it charged for all this testing

[Mikey3]

Theres something before the CDI to tell the CDI to start the sparking process.
a magnet on the rotor usually - passes a corresponding magnet on the pickup coil which sends a pulse/pickup to the CDI - starts the sparking process...

HTH
mike
____________________
'04 Yamaha WR450F
'99 SV650 Streetfighter Project - mid build
'Motorcycling is about what you do; not about what you own, or how much you spend on it'

[davthegreat]

Thank you for all this help, I have work till late so I will get the muilti meter out tomorrow.

Im going to start with what Kickstart has said with testing the Coils resistance and comparing with the manual

Then next the CDI as Jimmy RS has stated and all the other electrics seem to be working fine.

After that I will proceed with the stator, as mredhead has put in plain language thanks I will have to read up how to test it.

Ill keep you all updated, hopefully should have it running soon again

cheers
____________________
1st (derbi senda 50)
2nd (mito which is in bits )
3rd (kawasaki kh125 "83")

[Mikey3]

Your problem is unlikely to be with the pickup coil/stator because theyre pretty well protected by casings so corrostion or bad connection there is very unlikely. Its more likely to be possibly the connection from this to the CDI, or as everyone has said, from the CDI onwards
HTH
Mike
____________________
'04 Yamaha WR450F
'99 SV650 Streetfighter Project - mid build
'Motorcycling is about what you do; not about what you own, or how much you spend on it'

[davthegreat]

Hmm I see ok.... I have just looked through the manuals and cant find anything that says how to test the coil or the resistances im looking for ?

Thanks
____________________
1st (derbi senda 50)
2nd (mito which is in bits )
3rd (kawasaki kh125 "83")

[jimmyRS]

connect it up and use the dmm and see if you're getting any voltage through it at all

[davthegreat]

Hmm ok I put the coil back on the bike and tested across it and nothing coming out of it at all......
____________________
1st (derbi senda 50)
2nd (mito which is in bits )
3rd (kawasaki kh125 "83")

[jimmyRS]

this is whilst pressing the starter button right?

no current will flow through it unless the circuit is actually engaged, e.g. ignition circuit

if youve pressed it and its reading nothing at all, then likely your coil has packed in

[davthegreat]

Yeah this is with the button pressed in, maybe I have been putting the multi meter prongs in the wrong place ? there seems to be 3 cables coming off the coil one being an earth the other 2 im not sure about ?
____________________
1st (derbi senda 50)
2nd (mito which is in bits )
3rd (kawasaki kh125 "83")

[jimmyRS]

earth, input, output

twas explained earlier properly, but im guessing one is the feed from the cdi, the other to the spark plug cap.

just earth the negative on the dmm anywhere where its definitely capable of earthing, and put the positive on the lead to spark plug. If it gives no voltage at all try the input from the CDI, see if its actually being fed it.

[Mikey3]