I need a set of tyres for a CBR1OOOFJ88 the original are Metzeler ME99A2 140/80 v17-v270 &ME 110/80v17 skinny for a litre sports/tourer,whats the modern equivalent options? I've looked at manufacture & suppliers sites typing in bike model ,but some options available are for commuters & retros (enfield & guzzi) One manufactures best choice 150/70 & 110/70 I didn't think you could use different sizes? What should I budget for supplied &fitted? Thank you for any help you can give.