And they can not because they copied it again from a motorcycle.....

I actually was just thinking something like that.
It offcourse could have been that this system was already existing somewhere.....

For everyone in Australia kelletts hobbies/ace hobbies now have the new .12EVO4 and sirio 7 plugs which are now marked.

is there anyone familier with the sirio EVO4 tuning setup? i've tried mine and it seemed the power is not as satifying as the EVO3 STI. Any advice on the clutch tuning for this EVO4. I've tried the same clutch setup as the EVO3STI but the engine became lag, then i tried to increase the clutch engagement (tighten more) and it increased a little but runtime was effected. I've even tried various clutch gap but still the same. Can anyone suggest me the needle setting or power setting for his engine. TQVM

is there anyone familier with the sirio EVO4 tuning setup? Please advice...TQVM

Anyone in the US have the Evo4 yet? I am looking to pick one of these up as soon as I see them in the U.S.

Got mine from Italy they are not available in the U.S. yet hopefully before the year ends

Sneaky pm I got my Evo 4 from www.capricornrc.com

have u tested the engine? how the clutch setup? is it similiar to the Evo3STI? how the power? I hope it is the same because it uses the STI conrods, crankshaft, and the design of the piston and sleeve looked similiar to the Evo3STI

On my Evo3 STI, the plug seems to be leaking. This really sucks. Is it just me or is the button head material too soft?

Haven't heard about that problem. I assume you are using Sirio glowplugs.

Evo 4 Piston & sleeve looks identical to the 3 I have not inspected the crankshaft yet & have not had a chance to break it in as for the power I've seen Toso running it for a couple of races & there's no doubt that it is fast
as for the clutch it is way lighter than the standard RRR system & will be getting it ready for my next race so I will be able to give you more info but the clutch is really sweet

Been running the Sirio for 2 years now & have not come across this issue

Never experienced this before. Are u using the correct sirio plugs? or have the threads on the plugs or at the turbo head been compromised? probably u screwed it (plug) in to fast without matching the thread correctly, and damaged the thread on the turbo heads?

Does anyone have a crank for a sirio kanai evo2 motor, or know of any other crank that works in this motor.