Theleek Posted August 12, 2009 Share Posted August 12, 2009 Hi, I just fitted a new Doppler S3R exhaust to my stock Aerox YQ50 08. The problem is that the bike will either take off very quickly and reach 55mph+ or just bog down, go very slow and not reach speeds above 30mph. I can be going fast and it will suddenly slow down. Do I need a new air filter? re-jet? lighter rollers? Please help Thanks Link to comment Share on other sites More sharing options...
ReIcE Posted August 19, 2009 Share Posted August 19, 2009 When putting on a sports pipe your best option is to change the rollers to lighter to keep the bike running smooth. i had a viper pipe on mine and had 4 gram rollers in it and it was running sweet, but then i experimented putting 6 gram rollers in for top end but then it started bogging like yours. another thing it is reccomended that you up-jet 5-10 sizes. Link to comment Share on other sites More sharing options...
barwell1992 Posted August 19, 2009 Share Posted August 19, 2009 yeh and if you do all of the above you might as well get an aftermarket filter and go 20sizes up on the jets that way you get the most out of the upgrade also i would get a selection of jets from 10 sizes biger to 25 sizes biger Link to comment Share on other sites More sharing options...
CURT92X Posted August 19, 2009 Share Posted August 19, 2009 OMG i thought it was only my ped that does that lol mine does the exactly the same i hate it, my ped is fuckin quick when it runs Link to comment Share on other sites More sharing options...
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