This was my original post in 03 or so, I was going back & forth w/a brit racer who was the beta tester & first 2 make the Mod.
After he sent me his Dyno test I was the next 2 make the Mod , test it & post it.
Spade drill three 1 1/4 holes in the filter bottom (in a triangle pattern) then place back in air box, mark holes. (with grease pencil) take out filter & spade drill out the same holes in airbox bottom. Y can stager the holes if U want (so they don't line up but U WILL get MAD AIR!
This works because our air boxes have no breather valves (or vents) & require no airbox for engine to run correctly. More air & fuel combined w/ sync of carbs = POWER
My bike is TOTALLY different since & I highly recommend the Mod.
Another Mod: I also noticed that the Pingle petcok made a diffrence as well, stock filter is restrictive & made like crap! Bike was looking for more fuel & breaking up @ high speeds
I have made the Mod on a few TBA/Speedmasters w/nothing but + results & big smiles! O-yea,
Also: Valvoline 4 stroke wet clutch motor oil ($4 a qt. NAPA & other stores) w/half quart of lucas oil treatment has been my secret weapon mixture since 02.
No dry starts in summer or after sitting. Take off your valve cover & look @ how the Lucas coats the top end!
It's in all my vehicles & my compression tests prove how great the product works, crazy cool!
Sincerely
G@ry J@mes
