EMIS­SIONS GUB­BINS

Fast Bikes - - USED BIKE GUIDE -

The SP-2 has a se­ries of emis­sion- curb­ing gub­bins that can quite eas­ily be re­moved to boost its midrange. The air­box flap­per comes out and the smog re­duc­tion sys­tem (a kind of valve on the ex­haust port that blows air into the pipe on over-run) can be blanked off. Do this and you will no­tice the en­gine gain a sig­nif­i­cant boost in the midrange.

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