Heavy Duty - Known as 428H with 100 Links
This drive chain measurements are:
IMPORTANT NOTE: This size chain is a very common chain for the kids atvs, dirt bikes etc. Measure your old chain to make sure correct chain is ordered.
Some of the front drive sprockets will have numbers on them which identify exactly what chain number is used.
The #428 and #428H are interchangeable and will run on the same sprockets. The H means heavy duty and the chain has thicker heavier side plates.
Other sizes will not interchange with drive sprockets
The Kazuma ATVs under 110cc but including the Kazuma Viper Dirt Bike all use the #428 chain.
Some early day Redcat ATVs are actually Kazuma brand so they will use the Kazuma sizes above. HOWEVER, please measure your chain to insure you are ordering the correct chain size.