Tune Length

[MrBenelli]

Greetings all,

Im trying to find out what is the necessary tune length of an exhaust needed when running a Polini Evolution 70cc cylinder for a minarelli motor?

 

[tiba_karotsu]

is the cilinder still untuned? what rpm do you wish to start the powerband from? you can ask roost or any pipe maker in this forum for your queries. i hope this helps a bit.

 

[seba1601]

buy the book 2-stroke performances tuning by A. Graham Bell.
it's all explained in there

 

[MrBenelli]

The cylinder now is untuned... the power range on the untuned bikes are 8000-13700?

 

[Ruben]

You can buy a c20/Hebo Racing 2/3 or even 4/MHR team/EVO exhaust. But also a untuned EVO 70cc will perform nice with c16

 

[MrBenelli]

The bike is for race purposes so im looking for the most out of the un-tuned cylinder... therefore im looking for the best exhaust i can either buy or make for it...