Hey There guys,
i have picked up a mc16, 42000km on the clock, this bike was sitting in a shed on a farm, asked the farmer if he wanted it and he said i could take it away. have had one of these years ago and remember it having issues with the cdi's dying all the time. this one has the same issue, front cdi is dead and has no spark, swapped it with the other one and its fine. i want to rebuild it but was wondering if there is a mod to get past this fault on this model or can rewire it and bypass the cdi alltogether.

P.S. i have resoldered the faulty one but it still not sparking.

any ideas appreciated

Jimmy13 posted this a few months back, several people tried it with great results. do a search for MC16 CDI issues DO NOT DESPAIR

To all you MC16 owners out there......

I have recently had issues with the CDI units on my bike well one in particular (MC16 has 2). This unit controlled the tachometer/rev counter also and so the key symptom was the rev counter going nuts when the ignition was turned on and dropping a cylinder when started.

Having searched the globe I found various used units at rather high prices in south africa and australia but considered £120+ to be excessive for a used unit.
I finally gave in and rang Wemoto for ideas they put me in touch with David Silver spares who I currently have a brand new unit on order with from Japan for £103 inc vat and delivery. GREAT !

In the meantime I found this guide on a XL600R forum ref CDI's of the same year...ironically the part number is almost identical and the XL also had 2 x CDI units made by the same manufacturer.

http://www.ta-deti.de/ta/knownproblems.html#blackbox

This guide highlights design floors with the CDI's and how to repair them.

So, as I had a new unit on the way I took the dremel to the faulty unit and quickly identified (after picking of rubber sealant under cover) a component leg with no solder.
I then resoldered the leg and tested.
Started first kick !! SUPERB

I then replaced cover and used a silicone sealant to finish the job.

I am going to keep the new unit as a spare but the bike has started and ran perfectly ever since.

So to summerize this repair technique does work if you have a little electrical knowledge and a keen eye and can save you £100.
I'd be happy to perform the repairs on your broken CDI's for a small fee also so please pm me.

I saw that post previously, and tried to resolder all of the board, its strange tho, cos when u resolder the joints has anyone notticed the bubbling that happens, this pretty much ensure's a **** joint. tried different heats settings too, but the same again. i think its hot air racing up from the enclosed cdi cos it has nowhere else to go due to the black sealant.

I think im gonna have to use a after market cdi and adapt it to this bikes setup, never done that b4, bout time i used my elect skills for sumthing constructive.

has anyone done that b4?

Hey moonfish, fwiw i have a new in the package mc16 cdi that is surplus. Drop me a pm if you are interested.

Cheers,

C13

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