Engine Earth Strap - Gen 1 Fazer - Running Voltage

[Gaz66]

Chaps

Is there a engine to frame earth strap? And if so, where is it located?

The battery negative attaches to the start motor mount.

I am getting 13.5v at 5,000 rpm across the battery which feels low. Normally charging systems are 14v+

So, cleaning up contacts/connectors. Battery to starter strap is good. Need to check the other .... if it's there.

Thanks

BSR67


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Yes mate, the ground from battery does indeed run direct to starter motor, which is really a balls up on Yamaha's part.
Front engine mount to frame is rubber damped, so no ground there, only part of motor that's in direct contact with the frame is the rear mount & since the frame & motor are factory painted, there's likely little grounding going on there either, amazes me these old Yams run at all.

It'll pay dividends to add a new copper ground from battery direct to a bare metal point on the frame, lights will work better too as they're pretty dog shit at best, also running a heavy gauge ground from headlamps direct to battery will improve current flow to lamps even further, it's an old copper loom that's well past its best, a better ground is an instant cheap upgrade, charging will be optimised too, minimal cost & time for big benefits, no brainer, testing as is will likely result in poor/incorrect result.