October 12th, 2018, 07:50 AM | #1 |
ninjette.org newbie
Name: Todd
Location: CA
Join Date: Oct 2018 Motorcycle(s): '07 250 Posts: 1
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Bike died, won't start
My '07 250 died on me while riding last week. Electrics just turned off. All fuses are good and a new battery didn't help. Occasionally the electrics will work and the bike will start and run poorly on one cylinder with the tach jumping all over the place.
I'm thinking bad ground. What do you think? Anyone know the ground locations on these bikes? |
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October 12th, 2018, 08:57 AM | #2 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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Just follow the negative wire from the battery to the frame.
Are you certain the "new" battery is good and fully charged? That's typically what they do when they have a dead battery, but poor connections are also a good possibility. |
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October 12th, 2018, 09:37 AM | #3 |
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Name: -
Location: -
Join Date: May 2009 Motorcycle(s): - Posts: A lot.
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The EX250 ground point is not on the frame.
On my '05 EX250 the main ground is a dedicated engine case bolt on the right-hand side of the bike, look just above the clutch cover, slightly above and behind the clutch actuator arm. You'll find the small bolt that serves no other purpose than to provide an attachment point for a thick black (color coded) ground cable. For verification that you've found the correct item you can back-track the black ground cable to confirm it goes to the battery negative pole (cathode). |
1 out of 1 members found this post helpful. |
October 12th, 2018, 11:55 AM | #4 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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The big battery-ground to engine is primarily for starter.
All other circuits have their own ground-wires connected to main black/yellow trunk that goes to battery ground terminal. Since everything is not working, I suspect one of main trunks that everything connects to. Inspect ground-terminal clamp at battery. Then measure resistance to battery negative terminal from opposite ends of ALL other ground wires (bulb-sockets, igniter, etc.). Make table in Excel and record your readings, a pattern may appear that helps. Or it could also be power-distribution. Pretty much ALL circuits get power through ignition-switch. So measure resistance between power-input terminal of ignition-switch to power-output terminals. Also measure resistance from ignition-switch power-outputs to opposite ends of each circuit. For example, between ig-switch output to positive-terminal of tail-light socket (with key on). This measures resistance of power-cable to ignition-switch, to output terminals, to wire between ig-switch to fuse-box, then through fuse, then through wire between fuse-box to tail-light socket. Could be power-wire between ig-switch and igniter. |
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