orion Posted December 12, 2009 Share Posted December 12, 2009 I hava a Yamaha YQ50 Aerox R 2009 and i have changed the exhaust to a technigas but the old std exhaust has 2 metal pipes at the front end, one thats welded up and one that goes to a black box which could be a sensor of some sort, which then goes else where? The new exhaust does not have these pipes on, so i have tucked the rubber pipe away, with a bolt in the end to stop any dirt getting in etc. Anyway the bike now performs worse than before, so i took out the bolt possibly a slight improvment but still runs bad, Wont go up hills very well, not that it did before. I have not done anything else to the bike like removing the front washer or changing the rollers, filter or jet size changes etc yet as i wanted to do one job at once to see how each improvement went on. Does anyone know what that sensor thing is? or any help Link to comment Share on other sites More sharing options...
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