Plastic Parts; Crank Adjustment - BERG BMW Streetracer Manual De Usuario

Tensioning the front chain:
• Loosen the bolts of the crank axle at the bottom of the frame.
• Tension the chain by moving the crank axle forwards.
• Tighten the bolts again. It must be possible to push the middle of the chain downwards by 1
centimeter. To check this you must remove the lower half of the chain housing.
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3.2.5 Plastic parts

The plastic parts must be checked regularly for damage a breakage.
In the case of breakage you must immediately replace the part concerned with an original part, in
order to guarantee the safety of the user.

3.2.6 Crank adjustment

After using the new product for several days (intensive use) or for up to two weeks (normal use)
after purchase, the mounting bolts with which the left and right cranks are mounted must be
tightened again (see illustration below). Note that they must be ' hand tightened' , that is to say with a
tightening moment of 30Nm at the maximum (it is a normal effect that after a short period of use, as
a result of the force applied to the pedals, the crank assembly settles).
An effect when this isn't done regularly, is that a certain amount of play can occur, which can lead to
damage to the crank and the crank axle. This play can be taken up by tightening the bolts further.
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BMW Streetracer
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