Honda Engine Serial Numbers

[MonroeMike]

1000001~ = 1973 atc70
1100001~ = 1974 atc70
atc110e-2000007~ = 1979 atc110
atc70e-2000007~ = 1978 atc70
atc70e-2100001~ = 1979 atc70
atc90e-1300001~ = 1974 atc90
atc90e-1400001~ = 1975 atc90
atc90e-1500001~ = 1976 atc90
atc90e-1600001~ = 1977 atc90
atc90e-1700001~ = 1978 atc90
tb01e-2000013~ = 1980 atc185
tb01e-2100001~ = 1981 atc185s
tb01e-2200001~ = 1982 atc185s
tb01e-3000008~ = 1983 atc185s
tb02e-2000001~ = 1980 atc110
tb02e-2200001~ = 1981 atc110
tb02e-2300003~ = 1982 atc110
tb02e-2500005~ = 1983 atc110
tb02e-2600001~ = 1984 atc110
tb02e-2700001~ = 1985 atc110
tb03e-2000001~ = 1980 atc70
tb03e-2600001~ = 1981 atc70
tb03e-2700003~ = 1982 atc70
tb03e-2800001~ = 1983 atc70
tb03e-2900001~ = 1984 atc70
tb03e-3000001~ = 1985 atc70
tb05e-2000001~ = 1981 atc200
tb05e-2100001~ = 1982 atc200
tb05e-2200001~ = 1983 atc200
tb05e-2300001~ = 1984 atc200s
tb05e-2500001~ = 1985 atc200s
tb05e-2537514~ = 1986 atc200s
tb05e-5000022~ = 1982 atc200e
tb05e-5100001~ = 1983 atc200e
tb05e-5300004~ = 1984 atc200m
tb05e-5400001~ = 1985 atc200m
tb05e-6000001~ = 1984 atc200es
tb05e-6000034~ = 1983 atc200x
tb05e-6100001~ = 1984 atc200x
tb05e-6200001~ = 1985 atc200x
tb05e-6300001~ = 1986 atc200x
tb05e-8400001~ = 1987 atc200x
tb06e-2000033~ = 1981 atc250r
tb06e-2100004~ = 1982 atc250r
tb06e-2200005~ = 1983 atc250r
tb06e-2300003~ = 1984 atc250r
tb06e-2400001~ = 1985 atc250r
tb06e-2500001~ = 1986 atc250r
te01e-2000014~ = 1984 atc125m
te01e-2100001~ = 1985 atc125m
te01e-2200001~ = 1986 atc125m
te01e-8300001~ = 1987 atc125m
te04e-5000001~ = 1985 atc250es, atc250sx
te04e-6000001~ = 1986 atc250es, atc250sx
te04e-7005001~ = 1987 atc250sx
te04e-8100001~ = 1987 atc250es
te04e-????????~ = 1988 atc250es
te08e-5000001~ = 1985 atc350x
te08e-5100001~ = 1986 atc350x
us90e-100122~ = 1970-1971 us90
us90e-200001~ = 1972-1973 us90

Any errors, let me know.

[denn]

I was hoping for that since the bike is supposed to be all original. Thanks again

[350x'inNY]

What manual by the way did you find all this info?

Bruce

[MonroeMike]

I compiled/cross checked from 25 manuals. I believe the Clymers had the most listed, some others had none.

[Bren_downe]

I got an 82 r last weekend with a second gen motor, according to your list its an 83 and 84? I've checked the number about ten time to make sure it's right.

Tb06e 2303555
Is it the first two numbers dictate the year or the last number? Both?
Just looking for answers. It'd be nice to know what I have.

[MonroeMike]

According to the list, it's an 84.

[captainweezy]

Awesome post! Just used it again.
I bought an 86 Trx250 with a black motor. I knew they did not have black motors so come to find out it is an 87 engine.

[captainweezy]

Here is a strange #. It is supposed to be a 350x but the numbers dont match up to the X listed.
Te08e-5022731

Bidding starts at 1 bagillion oatmeal creme pies if it turns out to be an 87.

[6spdls1z28]

Here is a strange #. It is supposed to be a 350x but the numbers dont match up to the X listed.
Te08e-5022731

Bidding starts at 1 bagillion oatmeal creme pies if it turns out to be an 87.

That's an 85