BIKERELIABILITY Reg check
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Kawasaki Z1100 R1: MOT pass rate by registration year

Which Z1100 R1 years pass first time, and which fall short of the model's 89.5% average, from 704 DVSA tests.

1984
highest-passing year · 90.9%
1986
lowest-passing year · 87.4%
3.5pp
spread across 3 years

Pass rate by registration year

first-time pass rate · cohorts with 50 or more tests · registration year from first use date

Highest pass rate: 1984 (90.9% of 208 tests). Lowest: 1986 (87.4% of 103). Years more than two points below the model average: 1986.

87%89%92%1984: 90.9% pass (208 tests)1985: 89.4% pass (349 tests)1986: 87.4% pass (103 tests)198419851986
RegisteredTestsFirst-time passvs model (89.5%)
1984 208 90.9% +1.4 pp
1985 349 89.4% -0.1 pp
1986 103 87.4% -2.1 pp

Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years. A first-time MOT pass is a roadworthiness check, not a full mechanical inspection.

Pass rate over time

first-time pass rate by test year · 2006–2023
73%86%100%2006: 89.3% pass (56 tests)2007: 80.0% pass (50 tests)2008: 78.3% pass (46 tests)2009: 82.9% pass (35 tests)2010: 84.2% pass (38 tests)2012: 84.4% pass (32 tests)2013: 88.4% pass (43 tests)2014: 94.9% pass (39 tests)2015: 91.4% pass (35 tests)2016: 93.8% pass (32 tests)2017: 100.0% pass (39 tests)2019: 93.9% pass (33 tests)2021: 90.9% pass (33 tests)2022: 96.9% pass (32 tests)2023: 100.0% pass (31 tests)20062023

Questions

Which Z1100 R1 years have the lowest MOT pass rate?
1986 registered examples pass first time less often than the Kawasaki Z1100 R1 overall (89.5%); the 1986 cohort is lowest at 87.4% from 103 tests.
Which Z1100 R1 year has the highest MOT pass rate?
1984, at 90.9% of 208 first tests (2005–2025).
How much does the Z1100 R1 pass rate vary by year?
3.5 percentage points between the highest (1984, 90.9%) and lowest (1986, 87.4%) cohorts with at least 50 tests. Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

Full report: Kawasaki Z1100 R1 reliability, failures and mileage · ranked #1113 of 5428 models· other Kawasaki models: ZX-6R, ZX-9R, ZZR600, ER5, ZZ-R1100, ZX