I havent been on in a while so i just saw this post. Me and my brother race metrakits and a couple other people we race with often. Me and my brother started on the battle ax's and they worked fine except they wore out after just 3 weekends. Then we went to the tt91's, which most of the metrakits have now, and the dont ware out that fast and they stick very good even in the rain. we havent tried the IRC's. In the metrakit calss for a while the sava's was part of the spec for that class. Well they dont ware any faster then the tt91's but on the metrakits they are very slippery. All the riders that had the sava's didnt seem to like them. After a couple races the were not the spec for the class anymore either. Now i dont know how the sava's would be on a ysr that wasnt racing, they might be good, but racing wise they werent that good for anyone i kno. | 
