JE Pistons Wire Lock .708 X .050

Most JE shelf pistons include double spiro locks as standard equipment. These locks are installed by spreading the lock between 1/8" and 1/4" and rotating the lock into the groove in the piston pin boss. Wire locks are installed in much the same manner but require chamfered wrist pins. Wire locks tend to spread side loads over more of the piston pin boss area and are considered to be a stronger method of holding the pin in place. Hook wire locks have a built in hook at the end gap. The purose for this style of wire lock is to prevent rotation within the lock groove itself. Tru arc locks fall between these two and can be used with the stock sharp edge wrist pins. The advantage of tru-arc locks is ease of installation and they can be re-used unlike spiro locks, however they are not recommended for medium to high horsepower applications.

Fitment

Most JE shelf pistons include double spiro locks as standard equipment. These locks are installed by spreading the lock between 1/8" and 1/4" and rotating the lock into the groove in the piston pin boss. Wire locks are installed in much the same manner but require chamfered wrist pins. Wire locks tend to spread side loads over more of the piston pin boss area and are considered to be a stronger method of holding the pin in place. Hook wire locks have a built in hook at the end gap. The purose for this style of wire lock is to prevent rotation within the lock groove itself. Tru arc locks fall between these two and can be used with the stock sharp edge wrist pins. The advantage of tru-arc locks is ease of installation and they can be re-used unlike spiro locks, however they are not recommended for medium to high horsepower applications.

• 2003–2013 Yamaha YZ450F Base
• 2003–2015 Yamaha WR450F Base
• 2011–2015 KTM 350 SX-F Base
• 2012–2016 KTM 350 XCF-W Base
• 2014–2016 Husqvarna FE350 Base
• 2014–2018 Husqvarna FC350 Base

Specifications

Manufacturer part number

708-050-MW

UPC

193564006325

Shipping weight & size

0.01 lb, 3 × 2 × 0.13 in

Notices

• Not legal for sale or use in California on pollution-controlled vehicles.
• WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
• Special order item — ships direct from the manufacturer; extended lead times may apply.