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I stretched my XF9000 137 to a 146 with a 1.75 track, I'm looking to put a torsional secondary on it, just looking for opinions on what helix I should get and what spring, the sled is going to be 50% powder, 50% trail

thanks!
 

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I stretched my XF9000 137 to a 146 with a 1.75 track, I'm looking to put a torsional secondary on it, just looking for opinions on what helix I should get and what spring, the sled is going to be 50% powder, 50% trail

thanks!
Tell STM what you’re setup is and riding style and they should help you out.


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Bikeman torsional conversion top notch, just look at the helix On bikeman and then look at setup on STM both work but which one do you want, this is for 1100 or 998
 

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I would put a stm torsional clutch on it. Works way better than those crappy kits
I just threw an STM complete secondary on my sled and it made a huge difference. The sled pulls like it has another 50hp.

STM does make a kit if a complete secondary is not in the budget.


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