Stock clutch spring

[tc1550]

Aprox how much hp tq numbers before se spring or upgraded clutch swap ?

[kd]

Bike weight, gear ratio etc?  More info may get you a better guesstimation.  That's all you can count on with no details.

[Chippitt68]

When I did my 103, made 115 foot lbs. I had to get the spring and take to tuner because it was slipping on the dyno

[tc1550]

2010 fat boy 6 speed fm 110 kit  rider is 160 lbs 50mm tb 625 lift tman cam bike has 113hp 125 tq no slip as of yet  on dyno owner rides easy / normal no burn out should se spring be put in or wait till see if it slips at all