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YEL 663S

1977 Mz Unknown

Blue Petrol 243cc
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MOT Status

Valid
Expires11 Jul 2026
Tests1 (1 pass, 0 fail)
Pass rate100%

Mileage

22,860 mi
Last recorded22,860 miles
Recorded on12 Jul 2025
4 checks still locked for this Mz
Stolen
Finance
Write-off
Keepers
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Vehicle Details

RegistrationYEL 663S
MakeMz
ModelUnknown
Year1977
ColourBlue
Fuel typePetrol
Engine243cc

All premium checks include

50+ data points
Finance Check (Experian) Insurance Write-off Salvage Auction Stolen Check Previous Owners Ex-Taxi, Police, NHS Mileage Anomaly Import / Export Scrapped Check Plate Changes

MOT History

1 pass
Pass 12 Jul 2025 22,860 miles

Shock absorber has a light misting of oil Both front forks (5.3.2 (b))

How Reliable is the Mz Unknown?

Based on 1,190 MOT tests across 590 vehicles.

88.2%
Pass Rate
324
Miles/Year
47
Year Lifespan
590
On UK Roads

Top MOT Failure Points

Headlamp aim too low 2
Full Mz Unknown reliability report

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YEL 663S is a 1977 Mz Unknown in Blue with a 243cc petrol engine. This vehicle has been through 1 MOT test with a personal pass rate of 100%.

The most common reason a Mz Unknown fails its MOT is headlamp aim too low, accounting for 2 recorded failures. If you're considering buying YEL 663S, it's worth having these areas checked by a mechanic before committing.

The Mz Unknown typically stays on UK roads for around 47 years. At 49 years old, this Mz Unknown is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of YEL 663S?

You can check the full history of YEL 663S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was YEL 663S registered?

YEL 663S is a 1977 Mz Unknown, first registered on 31 December 1977.

Is YEL 663S safe to buy?

The MOT history for YEL 663S shows 1 test with a 100% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does YEL 663S have outstanding finance?

Finance checks require a premium vehicle report. This checks against all major UK finance providers to see if there is any outstanding finance on YEL 663S. If you buy a car with outstanding finance, the finance company can repossess it.

No warranty or guarantee of accuracy is provided for any free data on this page. The data guarantee applies only to information obtained through the purchase of a full check.