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Fast singles, slower twins! (Read 59 times)

zipidachimp Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1391 surrey, b.c. Gender:	Fast singles, slower twins! 08/15/21 at 23:45:46 If anyone has been watching MotoAmerica roadracing this year, this is interesting: in Junior Cup, the kid on the KTM 390 single has won or led every race. The horde of Ninja 400 twins are having a hard time keeping up. Anyone have an idea what KTM is doing to these motors? Cheers! ps: almost as entertaining as MOTO GP !
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Fast 650

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Re: Fast singles, slower twins!
Reply #1 - 08/16/21 at 07:53:34

The 390 is a big bore short stroke engine. The bore is almost the size of the Savage but has only a 60 mm stroke, and it breathes through a 46mm throttle body. So it is happy to rev high enough to make the big horsepower numbers while having a better torque curve than the 400 twins. And the Euro spec 390 makes several horsepower more than the US spec version does.

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zipidachimp Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1391 surrey, b.c. Gender:	Re: Fast singles, slower twins! Reply #2 - 08/18/21 at 00:57:22 Watch the kid on #70 KTM ! https://www.youtube.com/watch?v=skZR3TI6eQY I'm not suited for this bike, but it would be a hoot to try one !!!!! Singles forever!!!! Cheers!
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twhitus

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Re: Fast singles, slower twins!
Reply #3 - 08/21/21 at 13:09:57

zipidachimp wrote on 08/18/21 at 00:57:22:

Watch the kid on #70 KTM !
https://www.youtube.com/watch?v=skZR3TI6eQY
I'm not suited for this bike, but it would be a hoot to try one !!!!!

Singles forever!!!!
Cheers! Cool

he straight up drifted that bike in about the 3rd to the last turn. i wonder how the bike can go that fast carrying those massive balls.

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