AFAM steel front sprocket 420 pitch for GAS GAS EC 50 ROOKIE, SM 50, TXT ROOKIE 80 and GILERA GSM 50, H@K 50, ZULU 50 1999-2008

AFAM offers this front sprocket for GAS GAS EC 50 ROOKIE, SM 50, TXT ROOKIE 80 and GILERA GSM 50, H@K 50, ZULU 50 1999-2008. The front sprocket sits on the gearbox output shaft and passes the engine’s power to the chain, which turns the rear sprocket and the rear wheel.

Why replace the front sprocket?

The benefits:

• An inexpensive part that protects a new chain and rear sprocket.
• Made of steel to withstand much heavier wear than the rear sprocket.
• Changing the number of teeth is the simplest, cheapest way to alter the gearing.

When should you replace the front sprocket?

Dished or hooked teeth: replace it straight away, otherwise it will ruin a new chain within hours.

Specifications and fitting tips

• Chain pitch: 420
• Material: Steel
• Front sprocket version: Standard
• Standard steel front-sprocket
• Top of range manufacturing and quality

Choose the number of teeth from the list: fewer teeth on the front sprocket (or more on the rear) gives more acceleration, the opposite gives a longer gearing.

Cross-Mania tip: Replace the front sprocket together with the chain and rear sprocket, renew the sprocket nut or circlip and check the output shaft seal.

Also needed with this part

• Rear sprocket : AFAM
• Drive chain : AFAM A420R1-G · AFAM A420MX2-G
• Chain lube : LIQUI MOLY 400 ml · LIQUI MOLY 250 ml

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
GAS GAS EC 50 ROOKIE 2005
GAS GAS EC 50 ROOKIE 2004
GAS GAS EC 50 ROOKIE 2003
GAS GAS EC 50 ROOKIE 2002
GAS GAS EC 50 ROOKIE 2001
GAS GAS SM 50 2005
GAS GAS SM 50 2004
GAS GAS SM 50 2003
GAS GAS SM 50 2002
GAS GAS TXT ROOKIE 80 2008
GAS GAS TXT ROOKIE 80 2007
GAS GAS TXT ROOKIE 80 2006
GILERA GSM 50 2003
GILERA GSM 50 2002
GILERA GSM 50 2001
GILERA GSM 50 2000
GILERA GSM 50 1999
GILERA H@K 50 2002
GILERA H@K 50 2001
GILERA H@K 50 2000
GILERA H@K 50 1999
GILERA ZULU 50 2003
GILERA ZULU 50 2002
GILERA ZULU 50 2001