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Reply To: KTM or similar Front fork springs wanted

Home Forums General Discussion Buy and Sell KTM or similar Front fork springs wanted Reply To: KTM or similar Front fork springs wanted

#34392
Box.a.Bits
Participant
  • Town/City: Wellington
  • Bike: BMW R80 G/S, R100GS & M72 Sidecar, Gilera Runner ST200
Rank: 1200cc Rider

If the springs are too long, you may be able to cut them to raise the spring rate. There are calculators out there that can tell you by how much this would stiffen things. You need to ensure that the spring won’t become coil bound. Provided that this cannot occur, then you can use spacers to get back any ‘missing’ length.

I have done this on Gus, an R100GS running YZ250 forks. Raised the spring rate from 0.41 kg/mm to 0.48kg/mm. Gus is 200+kgs & ran 250mm of fork travel. The conversion write up is here

I also did a similar operation on my R80 mono sidecar to stiffen the forks.