It's not just that the 120 is thinner. The main advantage for you is that it's 6 lbs lighter than the bias ply 130. It will really help your acceleration and ultimately top end. Remember too that radial tires typically get about 3% better gas mileage than the same bias ply tires, which means that theoretically they are more effcient at applying power from the engine, so just the fact that you go to a radial may give you a liitle more mph.

Finally, have you drilled out your rear rotor? You can get rid of a lb of rotating weight there too.

I run 0W40 Mobil One in my 250. It makes a noticable difference. My bike runs very strong right up to the rev limiter.

Hey Generic Do you have any specific tire brand/type in mind?
I have looked into a front radial for the front and rear but cant decide . How about two front slicks .One on the front and one on the rear?
I am just starting to gather parts for Sept.

tape is covering the headlight till I got an airteck front end

Thanks .I hope to kill some records

Awesome Man..
what about taller windshield for your bike. Looks like you are quite a big man compared to this bike. It might help you on the straight line don't you think?

Only a year and  half. lol

lol