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TJT RED performance clutch springs for derbi clutch!
perfect springs for flat reed, piston port or pyramid reed. you don't need the flat reed reinforced clutch to run these as you do with some springs. if you have a kit on your derbi you need some performance clutch springs! great tension for the around town ripper. too weak for the extreme racer but you already know that if you're an extreme racer.
length = 34mm
OD = 10.5mm
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Gets Them RPM's Up 
