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Re: rotax max jetting
Posted by 'HappyWheels77' on 11 Jul 2010 @ 10:35


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HappyWheels77
Joined: May 2005
Total Posts: 1
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cobleya: No need to get obsessed with reaching 13,500 - 14,000 rpm [unless optimising the kart for racing]. Max power is reached at 12,000rpm so if it's pulling c.12,500rpm by the end of the longest straight [with suitable jetting and gearing] then all's well. Additionally, not using the last 1,000rpm available [13-14k] you are prolonging the life of the engine significantly.

Try to optimise the main jet first [to give max rpm available] then the gearing, or else you find you are gearing up to an engine that is down on power in the first instance - hope that makes sense!

Message Thread:

rotax max jetting  by 'cobleya'   (20 Jun 2010 @ 21:05)
Re: rotax max jetting  by 'LeeMurray'   (20 Jun 2010 @ 21:52)
Re: rotax max jetting  by 'cobleya'   (20 Jun 2010 @ 22:20)
Re: rotax max jetting  by 'Ditch'   (21 Jun 2010 @ 3:50)
Re: rotax max jetting  by 'cobleya'   (21 Jun 2010 @ 20:32)
Re: rotax max jetting  by 'Ditch'   (22 Jun 2010 @ 4:49)
Re: rotax max jetting  by 'cobleya'   (22 Jun 2010 @ 21:27)
Re: rotax max jetting  by 'Ditch'   (22 Jun 2010 @ 21:42)
Re: rotax max jetting  by 'dad99'   (21 Jun 2010 @ 11:13)
Re: rotax max jetting  by 'alanrr'   (21 Jun 2010 @ 13:10)
Re: rotax max jetting  by 'cobleya'   (21 Jun 2010 @ 20:47)
Re: rotax max jetting  by 'alanrr'   (21 Jun 2010 @ 23:55)
Re: rotax max jetting  by 'cobleya'   (22 Jun 2010 @ 21:38)
Re: rotax max jetting  by 'UHSimon'   (24 Jun 2010 @ 23:11)
Re: rotax max jetting  by 'HappyWheels77'  << You are here!

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