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The 1988 Individual Speedway Junior World Championship was the 12th edition of the World motorcycle speedway Under-21 Championships. It was the first Championship open to all nations, which was why it was renamed the World Under-21 Championship from the European Under-21 Championship.
m - exclusion for exceeding two minute time allowance •
t - exclusion for touching the tapes •
x - other exclusion •
e - retired or mechanical failure •
f - fell •
ns - non-starter •
nc - non-classify