What causes Stator/regulator-rectifier charging failure on the Suzuki Gsx-r750 (k6/k7 Generation)?

Battery voltage at idle, check for melted connector pins Estimated fix cost: $150-$350

What causes Cam chain tensioner wear and rattle on the Suzuki Gsx-r750 (k6/k7 Generation)?

Cold start rattle from top-end, inspect tensioner condition Estimated fix cost: $80-$200

Staining around hoses, water pump, and thermostat housing Estimated fix cost: $50-$150

Oil residue on fork legs below seals Estimated fix cost: $100-$250

Known issues to inspect before buying a used Suzuki Gsx-r750 (k6/k7 Generation). What to check and how much repairs cost.

SERIOUS

Battery voltage at idle, check for melted connector pins

Fix cost: $150-$350

MODERATE

Cold start rattle from top-end, inspect tensioner condition

Fix cost: $80-$200

MODERATE

Staining around hoses, water pump, and thermostat housing

Fix cost: $50-$150

MINOR

Oil residue on fork legs below seals

Fix cost: $100-$250

☐Check charging voltage at 3000rpm

☐Listen for cold-start top-end rattle

☐Inspect fairings for crash damage repair

☐Pull service history, verify valve clearances done

Solid engine, electrical gremlins are main concern