Totaly agree with the 18ins comment, question is why fit them in the first place.sunny scott said:I have used uniroyal rainsports for years on my 'R'. only downside is they have a soft sidewall so can totally scrub a set after a few laps but excellent for everyday use and in the wet. don't think you'll be doing much racing with 18's though as you're handling will be crap anyway so the uniroyals would be a good choice if they do them in the size you want.
Apart form the looks and the fact you could fit HUGE brakes they will not work on a Pulsar. Best all round size for tyres, brakes, handling etc is 16ins.
Best of luck anyway.
Phil