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Old 01-22-2007, 10:04 PM   #1
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Default RB S7 worlds

hey guys i have a question for the rb drivers, do any of you know what they done different in the new S7 compared to the S7 worlds? thanks for any info.
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Old 01-23-2007, 08:31 AM   #2
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If your talking about the WS73 when you say worlds, They are 2 compleatly different motors. I think every part is different (not sure about the carb). I know the crank, case, bearings & head are different for sure. The regular S7 is nearly the same as the "old" S7 & WS7 (1). The WS73 even is a lot different from the WS72. I've been racing for years and you cannot go wrong with any RB you choose. You just need to decide how much you want to spend. I am currently running: S5, S7, WS71 and the S7 europa (very old).

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Old 01-23-2007, 12:25 PM   #3
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if im not mistaken the s7 worlds is the first s7 rb made, but they have a new s7 now, the reason im asking is i have and s7 worlds with black crankcase, and was just wanting to know what they changed compared to this one, with the new S7. thanks for any info
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Old 01-23-2007, 01:30 PM   #4
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The old WS7(black case, small orange head) is dimesionally the same as the new regular S7 I believe. The old Ws7 just has the black coating on the internals for longer wear. I'm not sure if the WS7 came before or after the S7 europa.
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Old 01-23-2007, 06:05 PM   #5
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ok thanks rbmike for the all the info, so far im very satisfied with my s7 worlds, but does lack some on bottom-end, but thats nothing a jp-1 pipe and a set of aluminum clutch shoes wont fix.
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Old 01-24-2007, 12:25 PM   #6
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The main difference between the WS7 II or III and the S7II or now III is the crank shaft, they have the same piston/sleeve/rod. Slightly different carbs. Thw WS7 line also has the caoting on the crackshaft.
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Old 01-24-2007, 08:22 PM   #7
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Quote:
Originally Posted by nitroveins
ok thanks rbmike for the all the info, so far im very satisfied with my s7 worlds, but does lack some on bottom-end, but thats nothing a jp-1 pipe and a set of aluminum clutch shoes wont fix.
Try a RB 192 header & RB 2020 pipe, That combo is killer on all the older style RB's (I only say that because I have never tried it on a S7III or C6BB).
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Old 01-24-2007, 11:57 PM   #8
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i will keep that in mind rb, but i already have the jp-1 on its way
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Old 01-25-2007, 05:47 AM   #9
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I believe that RB has also changed the size of the rear bearing in the new WS7III ,but the piston/sleeve and crank are the same. I do know that they changed the carbs to the new 2 needle unit that is the same as NovaRossi uses. I think the 7III also has a few suttle crank differences to help get the bottom end stronger and smoother transition to top end.
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