DT RE Chris Posted August 16, 2013 Share Posted August 16, 2013 Hi, please help, my DT broke down on me the other day, long story short, I found that there's no spark, however, I can crank it all day long with no spark but the moment I stop cranking it sparks once or twice and sometimes even fires up and runs??? so far only changed the coil but hasn't solved it. I've asked several bike mechanics but no one has an answer. Any help would be very appreciated. Link to comment Share on other sites More sharing options...
dt502001 Posted August 16, 2013 Share Posted August 16, 2013 Sounds like a cdi problem but first rule out the charging coils and the pick up coil,test them as per the manual each has a specific resistance measured in ohms if they pass the test then your cdi is most likely the problem. Hope that helps Link to comment Share on other sites More sharing options...
Moderator DirtyDT Posted August 17, 2013 Moderator Share Posted August 17, 2013 Moved to workshop. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted August 17, 2013 Moderator Share Posted August 17, 2013 For now Chris...Try bumpstarting it Link to comment Share on other sites More sharing options...
dt502001 Posted August 17, 2013 Share Posted August 17, 2013 Let me guess airhead a dtre is point fired? Why don't people add the year of the bike when asking for help!It's like saying my bike won't run . Link to comment Share on other sites More sharing options...
Moderator Airhead Posted August 17, 2013 Moderator Share Posted August 17, 2013 no mate, it's CDI but doesnt have a kicker, sounds like it's only sparking when the elec starter is dis-engaged?...Thats why I said try a bump for now Link to comment Share on other sites More sharing options...
dt502001 Posted August 17, 2013 Share Posted August 17, 2013 Oh ok that makes sence I've seen that before the starter draws so much juice that there is crap left for the primary windings in the coil,you might get a spark but it's so weak that it won't spark under compression. Still best to check the charge coils and pick up esp if it won't bump. I had a 1984rz 350 that refused to start on certin days unless you kicked it 30-40 times then it would run like nothing was wrong for days or weeks,I checked everything 2x and I had 2 rz at the time and swaped everything but the cdi,didn't want to fry a cdi if something was causeing the cdi to fail, finaly one day it wouldn't start and I swaped the cdi as a final resort,, problem solved. Link to comment Share on other sites More sharing options...
DT RE Chris Posted August 18, 2013 Author Share Posted August 18, 2013 Thanks guys, I'm going to have to buy a Haynes as I don't know the resistances/voltages components should read. i'll keep you posted Cheers again. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted August 18, 2013 Moderator Share Posted August 18, 2013 so how did the bumpstart go then ?? Link to comment Share on other sites More sharing options...
DT RE Chris Posted August 18, 2013 Author Share Posted August 18, 2013 So, I tried bumping it and got a good spark, so I then tried it on the starter and got a good spark??? thought to myself its fixed itself put it back together, no spark Again, long story short, bad connection, the 4 pin connector block which feeds the ignition had oxidised and corroded, I bypassed this block temporarily had hey presto it sparks, ordered a new connector block as the old one is irreparable so should be back on the road soon Thanks again guys. Link to comment Share on other sites More sharing options...
dt502001 Posted August 18, 2013 Share Posted August 18, 2013 I would just hard wire it ( solider and shrink wrap)if it is prone to corroison due to it`s location. Glad you figed it out,everyone in the world can give you all the advice,but if your not willing to realy search and check electrical problems then you will never find the problem and you did exactly that ,,,search seek and fix,best to sill pick up that manual for future repairs Link to comment Share on other sites More sharing options...
Moderator Airhead Posted August 18, 2013 Moderator Share Posted August 18, 2013 Thanks for the update Chris Link to comment Share on other sites More sharing options...
DT RE Chris Posted August 18, 2013 Author Share Posted August 18, 2013 Haynes manual on order, and the connector block I ordered is not genuine, I searched for a waterproof block (which comes with new pins) in order to prevent this happening again. Link to comment Share on other sites More sharing options...
dt502001 Posted August 19, 2013 Share Posted August 19, 2013 Thats another Idea the waterproff connector and now we have another fixed bike,can't take any credit at all but the next person who read's this will start thinking about connections/connectors esp you guy's on that side of the pond with the salty air and wet months,so many problems with the elect 's can be traced back to crapy connections and as I like to call it GREEN DEATH. Link to comment Share on other sites More sharing options...
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