Hiflo HF156 engine oil filter for KTM 400 and 620 EGS, Duke 620, Duke 640 99-06, LC4 640

The Hiflofiltro HF156 oil filter is the replacement for KTM LC4 single-cylinder engines: 400 EGS, 620 EGS, 620 Duke, 640 Duke from 1999 to 2006 and 640 LC4. It is a spin-on cartridge from the Premium Filters range, equivalent to the original KTM codes 583.38.045.000, 583.38.045.100 and 583.38.045.101.

On these engines the HF156 works as the second oil filter, alongside the main one, and should be replaced at every oil change to keep the lubrication circuit clean. Hiflofiltro is one of the benchmark names for motorcycle and scooter air and oil filters.

What the second oil filter on KTM LC4 engines is for

LC4 single-cylinder engines have two oil filters: the main filter and a dedicated second filter, which traps dirt, metal debris and harmful particles before they reach bearings and moving parts. If it stays in use beyond the intended interval it clogs, the oil circulates less well and internal wear increases, so it is best changed at every oil change together with the main filter.

Features

• Hiflofiltro HF156, Premium Filters range
• Spin-on cartridge with black metal body
• Equivalent to KTM codes 583.38.045.000, 583.38.045.100 and 583.38.045.101
• TÜV SÜD tested, as shown on the packaging
• Second filter on KTM LC4 engines and first filter on the 660 SMC and Rally Factory Replica

Compatibility

The HF156 is listed by the official Hiflofiltro catalogue for:

• KTM 400 EGS (second filter)
• KTM 620 EGS (second filter)
• KTM 620 Duke and 620 LC4 (second filter)
• KTM 625 SXC and 625 SMC 2004-2005 (second filter)
• KTM 640 Duke 1999-2006 (second filter)
• KTM 640 LC4 (second filter)
• KTM 660 SMC 2004-2005 and 660 Rally Factory Replica 2006-2007 (first filter)

Check your KTM's model and year: some retailers list slightly different years, for example for the 640 Duke.

Original references

The HF156 replaces the original codes KTM 583.38.045.000, 583.38.045.100 and 583.38.045.101: compare them with the one on the fitted filter before ordering.

When to replace the oil filter

Replace it at every oil change, or at the intervals given in your KTM's manual. A clogged filter no longer traps dirt and can compromise the lubrication of an LC4 single, which runs at high revs and temperatures.

Fitting and tips

• Drain the oil with the engine warm and unscrew the old filter
• Lightly oil the new filter's gasket with engine oil
• Screw it on by hand until it touches, then tighten to the torque shown on the filter and in the manual
• Refill with oil, start the engine and check for leaks after a few minutes

Frequently asked questions

Which KTMs does the HF156 fit?

400 EGS, 620 EGS, 620 Duke, 625 SXC and SMC, 640 Duke 1999-2006, 640 LC4 and, as first filter, 660 SMC and 660 Rally Factory Replica.

Which KTM codes does it replace?

583.38.045.000, 583.38.045.100 and 583.38.045.101.

Is it the main filter or the second one?

On KTM LC4 engines it is the second oil filter; on the 660 SMC and Rally Factory Replica it is the first.

How often should it be changed?

At every oil change or at the intervals in the manual.

Is it a spin-on filter?

Yes, it is a spin-on cartridge.