Broken Crank Causes???

K

Klimbing Kitty

Well-known member

Oct 28, 2008

1,060

352

83

Whistler, BC and Skagway, Alaska

www.mtbakermoto.com

• Nov 22, 2008

• #1

Last year my brother and I broke our cranks. We were both riding 2007 m1000's with slp pipes, cans, BD boxes. Now I have sold mne and bought an 09 and my brother has bought an 08 but we can't afford to have it happen again. Can anyone please tell me the cause and what can be done to avoid this, or is it possible that we both just had cranks with flaws? As well, when they let go we were riding in about a foot and a 1/2 of fresh pow. Any advise appreciated!

 

D

diggerdown

Well-known member

Apr 25, 2004

3,452

677

113

Deer Park Wi.

• Nov 22, 2008

• #2

Some of the four tower clutches were very unbalanced and took some of the cranks. Thats a big part of the reason they dropped them and went back to the three tower.

 

K

Klimbing Kitty

Well-known member

Oct 28, 2008

1,060

352

83

Whistler, BC and Skagway, Alaska

www.mtbakermoto.com

• Nov 23, 2008

• #3

Thanx 4 the input. I should be good then with my 3 post.

 

M

Madscientist

Free Member

Oct 21, 2008

30

1

8

Newfoundland

• Nov 23, 2008

• #4

Did you have your primary clutch apart to install a clutch kit for your mods you have done? If so check to make sure all the clutch markings line up so it will still be in balance.

 

H

hellclimber

Free Member

Nov 26, 2007

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norwegen

www.hellclimbers.com

• Nov 23, 2008

• #5

we had one 07 M1000 break the crank the first year but it looked like material failure, bad casting, and he got a new crank on the warranty.

the cranks on the 1000cc are quite badly balanced from AC and alot of our 1000cc's have cranks out of balance causing belt failures etc, and one brand new, was out of balance, right out of the box...