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followup to cdi question
Posted: Thu Jul 10, 2008 11:50 pm
by Al T
So I decided to look beyond the CDI at things that are connected to it
and might affect it. I discovered that the resistance of the pickup
coil is infinite (meaning that there might be a break in a wire or the
thing is pooched). Does anyone know if it would be possible for a
broken pickup coil to fry the CDI? It seems possible to me since the
exciter coil provides energy to the cdi which waits for a signal from
the pickup coil to release the energy to the spark plug. Could there be
too much energy put into the cdi since it stops discharging or do the
capacitors in the cdi have some sort of overload protection?
Al
rattling dead klr. :-(
Posted: Fri Jul 11, 2008 9:09 pm
by n1rzc
Sigh, bummer. I was hoping that there was clearance, but the noise he
describes is starting to make sense. I'll have the bike here in the
morning to begin the teardown. Sounds like I may as well plan on
having an engine sitting on the bench for a bit. The AR15 will have to
find a new hangout for a bit.
Thanks for the quick response!
E
> If the cam timing changes enough, the valves can hit the piston, or
> vice versa.
>
> Broken "doohickey" springs have been known to go through the cam chain
> and cam chain sprockets, changing the timing. Occasionally a piece of
> the doo/lever itself has also done this, but the spring does it more
> often. the lever/doo more often causes issues in the transmission - if
> one is unlucky enough for the broken part to do damage. I know of
> several people that had the broken spring cause a cam timing change.
>
> Take a look at this site. It also has a lot of useful links. The
> marknet site has some detailed maintenance info. On the valve
> adjustment, if the valve clearance is over spec, the valves are bent.
> Just be very careful if/when you install the upper cam bearing halves
> - don't force anything.
http://www.bigcee.com/klr650faq.html
>
> all the best,
>
> Mike
>
followup to cdi question
Posted: Sat Jul 12, 2008 9:00 am
by Curtis Van Weelden
I work with coils and electronics for my job (solenoid engineer). That doesn't make me an expert about CDI, but a break in the coil wire would cause a voltage spike at the break (if there was current flowing) not at the CDI.
Curt
Curt Van Weelden
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