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The calibration of TRA.....
high number high max rpm, low number low max rpm,
but if lower rpm increase top speed ???
and high rpm decrease top speed?

Regard from Italy excusme for bad enghlis

You are losing trackspeed if you set it under or above the RPM where you have the HP -peak.

OK, but technically:
* High rpm ---> The belt is in Low position in TRA pulley.
* Low rpm ---> The belt is in High position in TRA pulley.

Correct ?

No, the opposite.

* Engine at low RPM or Idle ---> The drivebelt in LOW position in the TRA clutch.
* Engine at high/full RPM ---> The drivebelt in HIGH position in the TRA clutch.

- - - - - - - - - - - - - - - - - - - - - - - -

Every "Clicker" number ( 1-6 ) on the TRA primary cluch raises
the top RPM of the engine with 150~200 RPM.

But it is not a good thing to have the "Clickers"
set on anything else than number 3 or 4

Ok but if the clicker are at number 3 and them i fit at number 4 the max rpm is higest
( the belt in in low position TRA in comparison the clicker 3)
if i change and put the number 2 the max rpm is more low
( the belt is in high position in TRA in comparasion of cliker 3)

right ?

i am not good english.....sorry i finish the school ten years ago.

Maybe this animation of the TRA clutch will clarify some of your questions...

http://www.youtube.com/watch?v=jtKUdGL7 ... r_embedded

Open it in full screen mode !!