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ministar
 Post subject: 998 Twin SU's
PostPosted: Tue Aug 07, 2012 9:34 pm 
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848cc
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Just a quick question.

Which are more suited to a 998, 1 1/8" or 1 1/4" twin carbs?

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simon k
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PostPosted: Tue Aug 07, 2012 9:37 pm 
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1 1/4"

1 1/8" were too small for anything

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drmini in aust
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PostPosted: Tue Aug 07, 2012 9:52 pm 
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simon k wrote:
1 1/4"

1 1/8" were too small for anything

Well, they did put em on the Mk1 Sprite (948cc bugeye...). :lol:
But yeah, I agree... :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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ministar
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PostPosted: Tue Aug 07, 2012 9:55 pm 
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Ok. So 1-1/4" are the biggest most suited to a 998cc?

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drmini in aust
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PostPosted: Tue Aug 07, 2012 10:02 pm 
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ministar wrote:
Ok. So 1-1/4" are the biggest most suited to a 998cc?

I'd use twin 1-1/4" on it, unless it's a racer...

I had twin HS2s on my 1st 850 with a Waggott 23/60 cam and a worked head, and it was a wee rocket :P
... for a while- then the 850 crank broke. :cry:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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XC9000
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PostPosted: Wed Aug 08, 2012 8:22 pm 
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1-1/4" for sure. I too had a 948 Mk1 Sprite with 1-1/8" standard and it could have used 1-1/4" SUs. The Sports 850 developed in Australia used twin 1-1/4" SUs - I doubt the smaller option was considered.

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