i have ordered a clutch from outlaw racing and they sent the wrong clutch. they have a mistake on their websites and charts. they say you need the ORC158 clutch for the superduke 990 but thats actually a kawa klx 450 clutch. so if your ordering a clutch from them you need to get the superduke R or the 990 adventure clutch which is the ORC177 clutch. if anyone is ordering a clutch from them or from ebay it will save you time since this mistake is on all of their listings.