I would get a k&n mate, it has a lower profile which makes getting it in easier and also has a build in nut on the end to aid fittinghttp://www.ebay.co.uk/itm/K-N-Filters-Performance-Oil-Filter-Yamaha-1998-FZS600-Fazer-KN-147-/141171396321?pt=UK_Vehicle_Oils_Lubricants_Fluids&hash=item20de788ee1