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Re: Rotax - no top end, help please
Posted by 'raceinstructor' on 18 Jul 2011 @ 21:18


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raceinstructor
Joined: August 2007
Total Posts: 2
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Hang on Chris there could be another cause! Check the fuel pump pulse pipe. I encountered exactly that problem on a Snr Max that would not rev beyond 12500, tried all the normal suspects, carb exhaust, valve etc even extreme gearing to no avail. The culprit was a very soft / leaking pulse pipe. I simply replaced the existing pipe with a new piece of fuel pipe and Hey presto 14000 + revs and normal service resumed.
Somtimes it is a simple and cheap fix, about 30p fixed this one!

Message Thread:

Rotax - no top end, help please  by 'Laney'   (18 Jul 2011 @ 12:57)
Re: Rotax - no top end, help please  by 'ScoobyScene'   (18 Jul 2011 @ 13:13)
Re: Rotax - no top end, help please  by 'Laney'   (18 Jul 2011 @ 20:49)
Re: Rotax - no top end, help please  by 'ScoobyScene'   (18 Jul 2011 @ 21:11)
Re: Rotax - no top end, help please  by 'raceinstructor'  << You are here!
Re: Rotax - no top end, help please  by 'Bigjim1978'   (18 Jul 2011 @ 22:07)
Re: Rotax - no top end, help please  by 'Laney'   (19 Jul 2011 @ 12:51)
Re: Rotax - no top end, help please  by 'PaulMRotax'   (19 Jul 2011 @ 13:22)
Re: Rotax - no top end, help please  by 'John'   (19 Jul 2011 @ 17:15)
Re: Rotax - no top end, help please  by 'Bigjim1978'   (20 Jul 2011 @ 8:42)
Re: Rotax - no top end, help please  by 'Laney'   (20 Jul 2011 @ 12:49)

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