got my mag head today .. turns out its just the sirio one not the SM one but im not fussed i think it looks better anyways ..

Attachment 790929
Attachment 790930

The engine is a Sirio design anyway, and yeah...nice looking head :nod:

blowing the cobwebbs out on my Schepis Model SM21 in my old heavy tank jammin x2 ... its got a dynamite top end pipe on it .. still needs a lil tuning but its a nice and smooth power band engine .. nothing crazy "anywhere"in the band ,just smooth .. .

+ YouTube Video

http://youtu.be/5NbgFO_o6W4

Dont know if this has been brought up yet, but Schepis is the global distributor for Sirio. There engines arent Sirio-based, they ARE sirio engines. If you are a Sirio distributor, you buy through Schepis. Unfortunately, the euro to dollar exchange rate is not favorable at the time I spoke to both Sirio and Schepis. It's even worse now. You can thank our government for not paying it's bills. :deathstar

Unfortunate, because both the rossi tuned 5-port ("boss") and 7-port ("sirio") looks sick.

Rear Bearing
 

Anyone knows the rear bearing size in Boss engine?

....

I'm running the R5R in truggy with a S header and 2104 pipe. Anyone running a medium header with that pipe?