What causes Worn piston rings, low compression on the Ural Planeta 5 (иж Планета 5 / Izh Planeta 5)?

Do compression test, listen for engine knock at idle Estimated fix cost: $20-$60

What causes Cracked or leaking points ignition on the Ural Planeta 5 (иж Планета 5 / Izh Planeta 5)?

Inspect condenser, points gap, check for weak spark Estimated fix cost: $10-$30

Look for fuel weeping around carb and petcock Estimated fix cost: $15-$40

Push down forks by hand, check for oil leaks on legs Estimated fix cost: $20-$50

Known issues to inspect before buying a used Ural Planeta 5 (иж Планета 5 / Izh Planeta 5). What to check and how much repairs cost.

SERIOUS

Do compression test, listen for engine knock at idle

Fix cost: $20-$60

MODERATE

Inspect condenser, points gap, check for weak spark

Fix cost: $10-$30

MODERATE

Look for fuel weeping around carb and petcock

Fix cost: $15-$40

MODERATE

Push down forks by hand, check for oil leaks on legs

Fix cost: $20-$50

☐Run engine cold, check startup behavior

☐Check frame for rust and cracks near welds

☐Test both brakes for fade and grab

☐Inspect gearbox shifting through all gears

Simple but aged, needs full mechanical refresh