Question about 2010 Yamaha Cygnus X

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Starts up no power then cuts out coz no power when rev pulled back and before that wouldnt not go faster then 20 mph

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That's a fuel issue you need to either pull the carby out and pull it down and clean and replace- or take it to a shop that can do it if you cant.

That is not something you will fix with short cuts.

Posted on May 19, 2014


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Posted on Jan 02, 2017

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SOURCE: cutting out at 20 mph

Hi, Check and/or replace SPARKPLUG also check plug wire(s).

Posted on Jun 20, 2011

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Top speed

a crash. The reason I ask is with all my mods my bike doesn't stop pulling. If I crack the throttle at 70mph it just climbs. 8090,100,110 with no sign of slowing or mellowing out. But once I hit 110, I get scared of the rev limiter and back off. I mean, if 120 was the true ungoverned top speed, I'm sure the power would mellow off at around 110mph and just slowly inch it's way to 120, right? Anyone with more guts that can shed some light on this subject?? Remember, it's a 750, so your 900cc opinion should differ greatly,i have an 800 so probably just a little difference from your 750. not much though i wouldnt think. first the rev limiter is not so bad. i have not hit it in 6th gear, but have hit it in just about every other gear including 5th. just try it out in a lower gear to see for yourself. it will just kind of cut out. nothing violent. definately makes you wanna ease up or shift up though. mine also pulls very strong up to about 120 mph. 120-130 takes some time. and 130-140 takes quite some time. i have only seen low 140's (speedo indicated. reality is probably about 130 mph as everyone says there is about a 10 % error on the optimistic side) i have run out of road before hitting the rev limiter in 6th everytime. just takes so long to get there. but i would think up to about mid to upper 140'S (again indicated) would be about it. doubt 150 mph could be hit just based on rpms at 140 ish (8000 ish) and how slowly it gains speed on the top end.,,,

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