whilst riding my D7 it suddenly stopped. all i have found is a lack of spark,there is a pulse but not enough to form a spark. even with the plug cap off. i am running a rooster booster junior ignition and that seems to be working . It has a wipac ac generator and i have changed the coil for a new one still a feeble output at the plug lead. any ideas anyone.
October 4, 2011
Check/replace the condensor.Or quickly clean up the points that may have arced and insulated themselves.Also check the resistance reading from the coil to the engine with the points open and then with them shut..It should be open circuit (not connected) so you have no shorted out lt lead.And the points closed check for high resistance accross the points and lead crimps should be about .002 ohms ish.
October 7, 2011
As the Rooster Junior is quickly removeable, I would start by removing it and refitting a condensor for testing. Even if the bike starts following this it is possible the RBJ is not at fault.
Most common issues are:-
1/. Insulator on points post (rear of magneto housing) failing.
2/. Bad connections.
3/. Failing coil. (even new ones die).
4/. Failing HT Lead.
5/. Bad Spark plug (esp. under load... sometimes they work outside the engine but not in.)
6/. Closed points (less likely with an RBJ)
and of course it could be the RBJ itself... if this is the case just return it for replacement.
November 10, 2011
hi mates, i had the same problem with my d7, changed everthing it turned out to be lack of magnetism in the flywheel after replacing it with n.o.s item the bike starts after a couple of kicks even after a week or so,a big fat juicy spark....only about a third of the circumference of old one had magnetism easily checked by holding a piece of metal around the circumference of the flywheel. Paul
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