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YLT 91S

1978 Yamaha RD400

Yellow Petrol 398cc
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MOT Status

Valid
Expires4 Sep 2026
Tests15 (14 pass, 1 fail)
Pass rate93.3%

Mileage

21,606 mi
Last recorded21,606 miles
Recorded on5 Sep 2025
Typical for 1978 Yamaha RD40020,029 mi

Below or average mileage for this year

4 checks still locked for this Yamaha
Stolen
Finance
Write-off
Keepers
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Vehicle Details

RegistrationYLT 91S
MakeYamaha
ModelRD400
Year1978
ColourYellow
Fuel typePetrol
Engine398cc

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

14 pass 1 fail
Pass 5 Sep 2025 21,606 miles
Pass 9 Aug 2024 21,197 miles
Pass 17 Jul 2023 21,135 miles
Pass 18 Jun 2022 21,087 miles
Pass 9 Jul 2021 20,927 miles
Pass 11 Jul 2020 20,688 miles
Pass 6 Jul 2019 20,466 miles
Pass 30 Jun 2018 20,042 miles
Pass 1 Jul 2017 19,930 miles
Pass 9 Jul 2016 19,836 miles
Pass 11 Jul 2015 19,511 miles
Pass 31 May 2014 19,264 miles
Fail 8 Jun 2013 18,931 miles

Headlamp at least one does not illuminate on main beam (1.2.2a(ii))

Pass 8 Jun 2013 18,931 miles
Pass 19 Jun 2012 18,096 miles

How Reliable is the Yamaha RD400?

Based on 3,222 MOT tests across 643 vehicles.

89.4%
Pass Rate
174
Miles/Year
50
Year Lifespan
643
On UK Roads

Top MOT Failure Points

Direction indicator not working 19
Roller brake test indicates a binding brake 19
Stop lamp does not illuminate immediately a brake applies 15
Horn not working 9
Horn not loud enough to be heard by another road user 9
Full Yamaha RD400 reliability report

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YLT 91S is a 1978 Yamaha RD400 in Yellow with a 398cc petrol engine. This vehicle has been through 15 MOT tests with a personal pass rate of 93.3%.

Across all 1978 Yamaha RD400 models, the average MOT pass rate is 89.0% with a typical mileage of 20,029 miles. This particular vehicle has performed better than the average for its year.

The most common reason a Yamaha RD400 fails its MOT is direction indicator not working, accounting for 19 recorded failures. If you're considering buying YLT 91S, it's worth having these areas checked by a mechanic before committing.

The Yamaha RD400 typically stays on UK roads for around 50 years. At 48 years old, this Yamaha RD400 is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of YLT 91S?

You can check the full history of YLT 91S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was YLT 91S registered?

YLT 91S is a 1978 Yamaha RD400, first registered on 12 April 1978.

Is YLT 91S safe to buy?

The MOT history for YLT 91S shows 15 tests with a 93.3% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does YLT 91S 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 YLT 91S. 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.