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UK's number 1 for BMW motorcycle parts

UK's number 1 for BMW motorcycle parts
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1. What is the power increase obtained by fitting the Siebenrock 860cc upgrade to a BMW R65?

1. What is the power increase obtained by fitting the Siebenrock 860cc upgrade to a BMW R65?

Siebenrock claim a 20% power increase and maximum torque of 75nm at 4200rpm.

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