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best modern motorcycle carbs for 948 engine

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best modern motorcycle carbs for 948 engine #1
cranberrysprite Milo S Lyle, WA, USA Sign in to contact	Topic Creator (OP) Apr 25, 2024 12:14 PM Joined 8 weeks ago 2 Posts

i have a 948 with a 40 over cylinder bore and i want to mount twin modern motorcycle carbs to what would be the best carb for this setup?

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Re: best modern motorcycle carbs for 948 engine #2
refisk Rick Fisk Frankenmuth, MI, USA Sign in to contact	Apr 25, 2024 12:57 PM Top Contributor Joined 12 years ago 14,703 Posts

SU HS2's. Oh wait, they are not motorcycle carbs. They are about the best though. smiling smiley

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Speedracer thanked refisk for this post

Re: best modern motorcycle carbs for 948 engine #3
pbcjr peter cantamessa east brunswick, NJ, USA Sign in to contact 1971 MG Midget MkIII	Apr 25, 2024 04:17 PM Top Contributor Joined 10 years ago 642 Posts

In reply to # 4789140 by cranberrysprite i have a 948 with a 40 over cylinder bore and i want to mount twin modern motorcycle carbs...

Why?...

In 1974 when I was 18, I passed on buying a running and driving 1966 Jaguar E-Type coupe for $1,500, which is what they were selling for at the time.
Fifty years later, I'm still kicking myself...

Edited 1 time(s). Last edit at 2024-04-25 04:17 PM by pbcjr.

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Re: best modern motorcycle carbs for 948 engine #4
ice Larry Ice Lawrenceville, GA, USA Sign in to contact 1971 MG Midget MkIII	Apr 25, 2024 05:31 PM Top Contributor Joined 12 years ago 6,119 Posts

Very few motorcycles have carbs now. As was mentioned, why? You prob won't get as much power with non-OEM carbs as you would with tuned OEM carbs. You don't have but 40 some HP so why waste it? To get the max power for the BE, follow tune up specs as in the manual!!

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about 2 weeks and 1 day later...

Re: best modern motorcycle carbs for 948 engine #5
ajbowles Adrian Bowles Westport, CT, USA Sign in to contact 1976 MG Midget MkIV	May 10, 2024 08:26 PM Joined 10 years ago 614 Posts

Check with John Parker at http://www.v-performance.com/

I bought his 42mm Mikuni HSR kit for my 76 Midget 1500. I don't know if he's done a 948, but he specializes in Mikuni conversions for cars. He's done a lot of Triumphs.

Adrian

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Re: best modern motorcycle carbs for 948 engine #6
Mtn Sprite Layne M Santa Cruz, CA, USA Sign in to contact 1969 Austin-Healey Sprite	May 11, 2024 07:34 AM Top Contributor Joined 5 years ago 2,731 Posts

I was at a friends Harley shop the other day and he is building a 104ci Harley with twin Mikunis. Extremely fast bike.
He runs an SU on his own “Gasser” and loves it. The bike version is popular on Harleys.
Why reinvent the wheel, SUs work well.

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Re: best modern motorcycle carbs for 948 engine #7
Speedracer Hap Waldrop Taylors, SC, USA Sign in to contact 1967 MG MGB Racecar "The Biscuit"	May 11, 2024 10:19 AM Top Contributor Joined 18 years ago 43,813 Posts

In reply to # 4789172 by refisk SU HS2's. Oh wait, they are not motorcycle carbs. They are about the best though. smiling smiley

Yep, no reason to reinvent the wheel, the twin HS2 are simple, easy to rebuild, and work great.

Hap Waldrop
Acme Speed Shop
864-370-3000
Website: www.acmespeedshop.com
hapwaldrop@acmespeedshop.com

Acme Speed Shop www.mgexp.com

MG/ Triumph Performance Street Engines - Cylinder Head Porting for street performance and race - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sports Cars, and others

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