Do get that pipe (if not now then in the future) There's something about it that will make you smile if not the cool sound, then it will be the power gain it will give you, it's especially good on that engine design

sweet-as il have to look into it ... why ya online bro .. does the engine i have , have much crank and sleeve work done or is it just a straight re-badged sirio with a mag head ?

As for as i know it's a rebadged Sirio CL7B (no STI), there is a tuned (by Sirio) version however. Not sure if you have that one. That tuned version will probably be close to or the same as the CL7B STI version.

STI = ceramic rear bearing, more agressive crank, better rod and selected parts (with serials/blueprinted) including matched piston and sleeve.

ok cool no stress .. for wat i use it for being a sti or not does not matter .. its all fun . thanks for the info tho ..

It's plenty fast, no matter what version

yesterday arvo had a lil play with my buggy .. got the SM.21 tuned in real nice .. the things a screamer and after a full tank of being driven hard just sat there idleing .. ha love it... now i had a look at the pipe that im running and its a 9886 novarossi pipe .. dunno if it suits this engine but judging from what AMAIN has on its site its a top end pipe with ok bottom. dunno how i pipe can be good at both lol but any ways , if its a top end pipe thats wat i wanna stick with SPEED! :P . also when i got the engine it had a fin broken off the MAG head ,then i broke one off it yesterday , i think because of it being MAG it does not hold up the best to lil crashs .. so might look for a siro head or orion alpha head to swap it out .

SWEET-as .. www.the-border.com has the MAG sirio s21 head in stock .. so i can now replace the broken fin one i have .. it was only $35 or so .. bargin they only had 1 i think, so i thought id snap it up befor ya cant get em any more ..

Nice, hope this head last longer Magnesium is lighter but also more brittle.

yeah i hope so too , i looked around for a siro head like a evo or cl3b ect .. just hard on the net to find any , yet a good price but finding the MAG head which is for this engine was a fluke .. .im happy .. thats the first time iv used that website to buy anything and i have to say .. the price's are dirt cheap .. .

I've ordered there before aswell, usually they are pretty quick with shipping. They had/have a big sale and yeah, some parts are really cheap

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 ..

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

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.

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

Anyone knows the rear bearing size in Boss engine?