Post by rockinez on Mar 7, 2014 4:21:02 GMT -5
Intermittent issues with my 2008 Tank 150cc Urban Sport were driving me crazy. I couldn't reproduce the strange electrical problems.
I have the body off for a seasonal refresh now and am waiting for parts, so am using the time to check and tighten up everything.
Tank scoots, as do all China Scoots, have their quality issues. I checked the ground to chassis bolt, and it was stripped and not providing a real ground. Both the bolt and the captive nut welded to the frame were cheese metal, and were worthless. I used a longer higher quality bolt, and a second capture nut to provide a good ground.
Just to be sure, I found an unused bolt hole on the frame, cleaned it out and connected a second ground wire to it. I remember doing this to my first Yamaha 100 45 years ago.
As 
% of motor vehicle electrical faults are in the ground, I figured I would use both belt and suspenders.
One thing these China Scoot projects are teaching me is to never overlook the obvious. Even if it tested good during last years refresh, doesn't mean anything today. I suspect the metal in the fasteners actually melts in the rain, not rusting, it just turns to goo.