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Fork bottoming out when bracking hard at low speed

thierry roullier

thierry roullier

Tuned and Synch'ed
Joined
Jan 1, 2019
Messages
38
Location
Paris IL
I referenced the forum at bike-urious.com/bought-on-bike-urious-1985-moto-guzzi-le-mans-1000-mkiv/

My 85 Le mans has a oil/pneumatic fork and I am trying to understand why it is bottoming out if I brake suddenly. It is clear that when this happens the top part of the fork is hitting something hard. I added air at the required pressure and may have to replace the fork oil. Besides that anything else I should look for? I confess I have not looked at the design in detail before asking this question. I assume there is a spring that should limit or prevent this from happening. I will take any clue and report back!

Thanks
 
Thank you Per the guzziology bible version 9 page 570 the Le mans 4 did not have the bitubo until 1986 so my bike may not have it. I will try to find out the best way to handle this. Either by replacing whatever is there by progressive springs or Bitubo ( Part 28526477 is available in Italy).
 
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