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Sputtering

1K views 4 replies 4 participants last post by  Zed-xer 
#1 ·
I have a 2012 zx10r and under heavy throttle in 1st it sputters around 7500k rpm only does it in first under heavy throttle and occasionally when I'm running out wide open in 6th gear... Bike had 25k on the clock I'm assuming all original coils and plugs... I've done the water test and the manifold seems to be heating all four exhaust manifold tubes evenly.... Any suggestions
 
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