Thanks Afastcar, got more. Pretty important for # crunchng.
On th e 39mm carb:
is a keihin
What main series 170 or 190 ( has to do with intake velosity)
Stocke intake;
89 or 90 ( 4 or 6 pettal) ( has to do with area related to velostiy)
Reeds:
single or dual stage ( has to do with flutter at rpm levles)
fiber or carbon ( has to do with the rise in natural freq from porting and flow rate for high rpm porting)
Note;( need to be with in .75 to 1.25 times of peak rpm freq)
Reed spacer ?
If yes how thick. ( has to do with area and reed timing on blow down)
Reed stops ? ( has to do with deflection and port blocking)
Not falimular with the 88 cr reeds, what thickness ( need to calculate reed deflection and tip ratios)
Rev pipe good for peak power of ex port change ( maybe), the golden rule for discussionis 500 rpm for every 1 mm of rise. Note: not changing the width I will use port open speed only for ratio comparison. 5mm rise equls 250 peak power rise. I will use the base peak rpm for stock of 7600 rpm with alt drive. And the change to 7850 to 7900 rpm for rev port. Not knowing frq of pipe i will assume the rev pipe is designed for over rev of 500 rpm based on max piston speed of around 8,000 rpm.
Rev delete
CDI (Capacitor Discharge Ignition): good for over rev and lower power range. Thought on this are heavier drive poundage spring to get on the pipe. I will use mybase line info I have for this using your mods.
Alt drive: how many disc. in the pucks? Engagement speed?
Plug type and number?
What cranking pressure #, if available.
What air box set up. Pic if available
The head info will help once "H" does C S I.
"H" did ATVR clean up the itake any and make any changes other than casting flaws
I will have more question in the future.