07 YZ450 sputter at 1/4 throttle?


1 reply to this topic
  • cnorton

Posted September 01, 2007 - 07:07 PM

#1

Just bought an 07 YZ450, starting getting it ready to ride, warmed it up and took it down the block, but a 1/4 throttle riding it was sputtering a bit and surging, but when I cracked it open it was fine, the stock setting for the fuel screw is 1 1/4 turn out, I turned it as far as 2 turns out and still does the same thing, Im coming off an 05 RMZ450 so I'm a little new to the Yamaha game, I love the bike, worlds better than the zuk, just need a little advise on tuning it in, can anyone out there give me some tuning advise, jetting, suspension etc, thanks.

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  • twenty34

Posted September 01, 2007 - 07:38 PM

#2

Just bought an 07 YZ450, starting getting it ready to ride, warmed it up and took it down the block, but a 1/4 throttle riding it was sputtering a bit and surging, but when I cracked it open it was fine, the stock setting for the fuel screw is 1 1/4 turn out, I turned it as far as 2 turns out and still does the same thing, Im coming off an 05 RMZ450 so I'm a little new to the Yamaha game, I love the bike, worlds better than the zuk, just need a little advise on tuning it in, can anyone out there give me some tuning advise, jetting, suspension etc, thanks.


There's a thread on top of this forum for all jetting specs. You need to change your jetting a bit or have ZipTy racing take care of it for you. This should help solve your problem.





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