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Old 08-08-2013, 08:00 AM   #1
bernardofeio OP
Bernardo Feio
Joined: Feb 2011
Location: Portugal
Oddometer: 31
Siebenrock Big Bore Kit 1070ccm fuel consumption


Does anyone has experience with Siebenrock Big Bore Kit 1070ccm fuel consumption?

What should I expect not changing any think else in the engine (Im even thinking of keeping the current R100GS camshaft)?

Thanks in advance
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Old 08-08-2013, 09:40 AM   #2
Beastly Adventurer
Joined: Feb 2006
Location: Bath Uk
Oddometer: 2,352
It depends on how you use it!

My full 1070 kitted bike gets between 40 and 50 imperial MPG, dells twin plugged etc erc. It goes well.
R90s 1070 replica, R90/6, 1958 R50
1971 Commando Fastback
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Old 08-08-2013, 10:05 AM   #3
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Joined: Jan 2006
Location: Atlanta
Oddometer: 7,611
Deadly99 will chime in here I bet. He has a 1040 kit 327 cam and mikuni vm 38s. His bike is a drinker.
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Old 08-08-2013, 12:32 PM   #4
Beemerguru...G/S guy
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Joined: Nov 2006
Location: Foster City, CA
Oddometer: 1,030
Built 2 bikes with the 1070..40mm Bings on both even though I have a set of Mukunis and Dellortos on the shelf..too many changes in altitude around here.

MPG all depends on the right hand...crank it hard and you get mid 30s...keep it smooth and around 64 mph and you can get low 40s.
Greg Hutchinson
BMW Club of Northern California, Ambassador, BMW MOA, Vice President Vintage BMW Club
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