Main Motorcycle: Yamaha TDM 900
Join Date: Aug 2012
Location: Bollnäs, Sweden
Speed Triple -03 slow cranking, bike won't start
this is my first post on this forum (apart from the one in welcome center), I have been lurking around for a couple of years though.
My friend has a 2003 Speed Triple which will not start on starter. On a running start however the bike fires up quick and nice. The problem started last summer, so he has had a lot of exercise while running with his bike.
The bike cranks rather slow and won't start. We have installed a new starter motor and tried with three different batteries. Even on jumper cables we can't get the bike to start on the starter motor.
We have followed DEcosse's excellent electrical troubleshooting thread and have done the following measurements.
Battery voltage ignition off: 12.0 V (yes, this is weak)
Battery voltage ignition on: 11.35 V
Battery voltage engine on idle: 12.5 V, drops to 11.3 when revving.
Resistance check on R/R three pin plug to 4-pin plug: About 500 Ohms when we get a reading.
Resistance check on stator: 1 Ohm on each.
Quick check for stator problem: Open circuit
AC voltage output from the stator: All combinations 20 V - 70 V (idle to 5000 rpm)
We have not yet pulled the stator cover.
In all the threads I have read I haven't as of yet come across an identical problem, of course I can have just missed it.
I would need some help in interpreting the measurements and any ideas and experiences about this problem are more than welcome.
Thanks in advance