Front Sprocket 520 Fit For Husqvarna Motorcycle TC610 TE410 SMR450 TC450 TE450 SM510R TC570 TE350 TE400 TE610 SM610 TE630 SM630 Works with TC610 TE410 SMR450 TC450 TE450 SM510R TC570 TE350 TE400 TE610 SM610 TE630 SM630;serves as 520 series front sprocket replacement output shaft spline specification;realizes direct mounting without extra or machined gear teeth fit 520 size chain tightly;ensures stable power transfer during offroad riding Adopts solid forged blank;polished tooth surface lowers abrasion extends lifespan Made to unified 520 standard dimension parameters; vehicle transmission assembly space