Hi Mate,
The old spring was softer & the new one was thicker coils/harder.
The old one the coils was thinner too.
But when fitted the spur could still turn by hand.
Yes the nut was fully tightened up & the car was undriveable lifting the car front end.
Lock tightened up & checked.
When it was fully tighten the car would wheelie & then started to feel nice after first minute.
Then started to slip,was stripping it's taking the centre out of the spur.
Today in the final spur was good for first few mins then started to slip & stripped again.
Oh if you like to know I'm only running 6.5t X12 motor which i thinking of changing to 7.5t too
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http://www.pbmracing.co.uk/
Kyosho MP9 TKI2
Team Orion CRF US edition & Team Orion CRF Alpha 5port
Kyosho ZX-5 FS2
Kyosho RB5 SP2
LRP SXX TC & Brushless X12
Speed Passion
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