Kyosho – Sirio Engine – S21BKEVOIIISTI

s21bkevoiiisti.jpg

New for 2007 Sirio has introduced their EVO III STI line up of engines.

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The EVO III line of engines feature a new crankcase to increase flow to the combustion chamber. Port timing and induction timing have been changed to increase torque and driveability. The result is an engine with tons of dirveable power and it’s easy to tune.

STI engines have all the “extra” touches that a true “team” engine has and they are now available to the public.

STI engines feature serialized crankshafts, cases and rods for better quality control. Each crankcase is hand selected and blue printed for the best tolerances. The sleeve is hand matched to the case to improve the flow through all the ports. The connecting rod features a surface treatment that ensures maximum strength. The crank shaft has an aerospace coating to improve durability and performance. Premium bearings are hand matched to the crank shaft and case tolerances. Add this all up and you have true factory team performance.

Designed for the Off Road buggies, the S21BK EVOIII STI is one of the hottest engines for 2007. The the new port timing along with the STI modifications make this engine a must have to 2007! There is no more technically advanced buggy engine on the market.

SKU: S21BKEVOIIISTI
Street Price (Approx.) – $399.99
Available – Late February

s21bkevoiiisti-3.jpg  New carburetor body design for off-road.

Features :

Displacement:
4.67 cc
Stroke:
16.62mm
Bore:
16.35mm
Ports:
5+2
Piston:
CNC
Sleeve:
ABC
Exhaust:
Rear
Weight:
370 grams
Crankshaft:
14.20mm SG Type
Carburetor:
Composite / Slide / Single Adj.
Plug Type:
Std/Turbo
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