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

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 :cool:

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 :nod:

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?