SKU: AD-BV57
Hilborn #57 Rotator Spool Small Engines , gas, methanol, under 150 cu in generally

Factory Hilborn rotator spool

This fits all Hilborn barrel (metering) valves

#57 spool

For small engines like 1 cylinder and motorcycles - Alky or Gas ok. ( not for Big Harley engines -  use a #54 for alky or #56 for blown alky )

.100" wide ramp

Non-turbo
Non-blown

These rotors are for the standard Hilborn metering valve. O-ring included. Choose from:
A - #57 Small motor on GAS 40-100 cu in  or methanol for 1 cyl engines
B - #54 Medium to large motor GAS or ALCOHOL
C - #56 Medium to large motor, moderate to high percentages of NITRO. Slot width:
A = .100"
B = .187"
C = .312"