04-17-2017, 09:05 AM | #16 |
Join Date: Jun 2011
Posts: 1,335
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The smog system on motorcycles are nothing but air injection systems that injects air into the exhaust stream, just past the exhaust port. It fools the emissions test into thinking the engine is running cleaner than it actually is.
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Tags |
apollo 250, cat removal, emissions control, epa |
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