staycasted
Posts: 38 Joined: 5/15/2009 Location:
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10/6/2009 4:14 PM Has anyone put a pipe on a YZ450 and afterwards it pops on deceleration. Heading into a corner after I let off the throttle it started popping and cracking.
Any suggestions would be huge. |
The Rock
Posts: 1095 Joined: 3/21/2007 Location:
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williamsmotowerx
Posts: 932 Joined: 4/01/2008 Location:
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10/7/2009 12:40 AM try turning your idle down a bit.
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motofab36
Posts: 400 Joined: 4/01/2008 Location:
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10/7/2009 5:59 AM Go one size bigger on the pilot jet.
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Cygnus
Posts: 7304 Joined: 8/15/2006 Location:
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10/7/2009 6:21 AM Edited Date/Time:
10/7/2009 6:22 AM Adjust the fuel mixture screw.
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staycasted
Posts: 38 Joined: 5/15/2009 Location:
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10/7/2009 6:25 AM thanks guys.
hey The Rock the muffler is brand new, so figured it was jetting related thanks for the ideas though. -ryan |
davis224
Posts: 1479 Joined: 8/15/2006 Location:
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10/11/2009 8:11 PM first check to make sure you tightened everything correctly and you aren't getting an exhaust leak. Look for for some black marks right around the exhaust port, unless you've already fixed it.
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The Rock
Posts: 1095 Joined: 3/21/2007 Location:
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10/12/2009 9:50 AM 
thanks guys.
No worries mate.
How much time does the brand new muffler have on it? Not all aftermarket companies use high quality packing. However I should have asked you first how old was the muffler. I just repacked Rick "Too Tech Racing" Johnson's OEM muffler off his 2008 CRF450 Honda and it cured the backfiring so this is why I offered this suggestion. Rick ripped off four holeshots at the Old Timers International race at GH weekend before last and was very surprised how much better his bike ran particularly in the mid range. His muffler was EMPTY so I wasn't that surprised....I am surprised though at how many racers never repack. |
Cygnus
Posts: 7304 Joined: 8/15/2006 Location:
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10/12/2009 11:00 AM
No worries mate.
I need some packing for my bike Rock. Vital drive discount? I own a track so I could sell a bunch I am sure.
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BUTCH
Posts: 3043 Joined: 8/15/2006 Location:
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10/12/2009 1:11 PM This would be my guess.
Holy Schnitzengruben!!!
Speaking to Dirty Filter......... Kid_N_Playah wrote: If it means anything I think you're one of coolest peeps on here. Void, Kawi and Indy-maico are cool peeps too. I hate snobs |
450
Posts: 20 Joined: 9/30/2009 Location:
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10/29/2009 3:26 PM Make sure you dont have a leak where the headpipe connects to the cylinder head. My 08 started to pop when the headpipe had a small crack in that area. Also when I first installed I had to open up the fuel screw a little bit.
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staycasted wrote: Has anyone put a pipe on a YZ450 and afterwards it pops on deceleration. Heading into a corner after I let off the throttle it started popping and cracking.
Any suggestions would be huge.