750 record/class question

[greaser89]

I'm new to the site and have had a passion for speed for many many years, along with many speeding tickets. I've decided to take the speed off the streets and to the tracks. I'm going to be running a 1981 Kawasaki KZ750 (4cyl) that has been slightly modified both chassis and engine so what class would I run in? M-PG or M-G? and also is there a current record for a Naturally Aspirated and air cooled 750cc motorcycle or is all 750's air/liquid in the same grouping? and what is the current 750cc N/A record?
 Thanks,
Tristan

[greaser89]

I may have answered my own question. I'd run either M-AG if I modify the engine and chassis. or M-P if I modify the frame only. I saw that the record for M-AG was 164mph but dint see a record for M-P? is that correct?

[55chevr]

M/PG is for modified pushrod gas ... your bike is overhead cam so it is M/AG  modified aspirated (no supercharged) gas ... Read the posted rules on the Bub-s 2010 website ... the record for open bike (no streamlining) modified gas is 164.813.