My 2015 900s has 1800 miles on it. It’s all stock with Racer Tech heavy duty spring. I like the 900 and it’s almost paid off, so I’m not buying another machine. The queen gave me the ok to add some power. The BMP kit is $2k (25hp), the silber turbo is $3k (50hp). Should the mileage concern me with either kit? I’m leaning towards the turbo for the hp vs cost. I’m just concerned about having reliability issues down the road. We ride mostly trails here in Eastern Pa. I’m looking for some outside opinions. Thanks