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Old 02-01-16, 09:27 PM   #1
neArly50yrsold
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Default Sv650s 2008 hunting/surging btw 3k-4k!!! Arrrgh

Is it my bike or do the later twin plug euro bikes hunt/surge between 3000-4000 rev range? On constant throttle at that rev range my bike just want settle, jerking and so on, especially in 2nd/3rd gear.
Anyone know about this? The bike has only done 6500 miles and has been meticulously maintained.
Many thanks
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Old 03-01-16, 02:28 AM   #2
Fen Tiger
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Default Re: Sv650s 2008 hunting/surging btw 3k-4k!!! Arrrgh

If it helps, there is no surging as you describe on my twin spark with about the same mileage. I would try a tank of super unleaded before anything else.
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Old 03-01-16, 09:46 AM   #3
Craig380
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Default Re: Sv650s 2008 hunting/surging btw 3k-4k!!! Arrrgh

At those rpm in 2nd/3rd gear, you're probably using only very light throttle, which could highlight the throttle bodies perhaps being very slightly out of sync. Check the caps / tubes on the TB sync stubs aren't cracked or leaking. Has the TPS set-up been checked recently?

Might also be worth checking the spark plugs are nipped up snugly, they can and do loosen in use.
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