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PSB Moto Italiano Per i proprietari dei motocicli italiani

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Old 23-08-2008, 05:35 PM   #1 (permalink)
Ducati 998, CBR1000RR Track, XR600 Thumper
 
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Ported Flowed-Testastretta Head
Over size Inlet Valves - 42mm
Ported and flowed head.
My 998's are very similar.

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Old 23-08-2008, 06:07 PM   #2 (permalink)
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So these ports are flowed?
All the head work i have seen done has a kind of "D" shape for the porting.
I was told it also helped excite the gases.
Given that i have only seen jap fours ported how are the twins different?
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