Description

KTM 660 SMC 2003 User Manual

If you’re holding a 2003 KTM 660 SMC and you haven’t read the factory owner’s manual cover to cover, you’re rolling the dice. I’ve seen guys burn up a clutch in 500 miles because they ignored the break-in oil change interval. Others have cracked a frame because they used the wrong chain adjustment torque. This 55-page document from KTM is what you need – not a reprint from some third-party that copies page 14 but drops the torque value. KTM 660 SMC 2003 User Manual is the real deal, direct from the manufacturer.

Factory Safety Warnings You Should Not Skip

Page 2 of this manual lays out exactly what KTM considers a hazard. There are two levels: a warning that can kill you (your body and your life – their words) and a caution that can make the bike unsafe for the road. It also includes the legally required noise control prohibition. If you’re in Australia, there’s a specific consumer information box. I don’t care where you ride – read that page before you start the engine. The manual also has blanks for frame number, engine number, and key number. Fill them in. You’ll thank me when you order parts.

Break-In and Maintenance Schedule

A new 660 SMC needs the first 1,000 km treated with respect. The manual spells out the oil change interval, valve check, and chain adjustment at that first service. After that, you’re looking at oil every 3,000 km and a valve clearance check every 6,000 km. These intervals are not suggestions. I’ve rebuilt top ends on bikes that followed the schedule vs. ones that didn’t – the difference is night and day. The manual also gives you the chain slack spec in mm (35–40 mm for the 660 SMC). If you don’t own a 20 mm wrench and a torque wrench, go buy them. The manual lists the tools you need for every job – no assumptions.

Controls and Operation: What the Manual Shows

The 2003 660 SMC has a manual transmission – and this manual shows you the shift pattern, the clutch adjustment procedure, and the idle speed setting. It also covers the choke operation, the fuel tap positions, and the steering lock. If you’ve ever stalled because you thought the choke was off when it was actually on, you’ll appreciate the step-by-step diagrams. The manual uses imperial-equivalent values where needed (e.g., tire pressure: 25 psi front, 28 psi rear solo). For a deeper dive into how a manual transmission works, see Manual Transmission on Wikipedia. Then come back here for the actual KTM-specific steps.

Technical Specs and Torque Data

You need torque values for the rear axle nut? That’s on the spec page – but the manual only lists a few critical fasteners. If you’re doing a full teardown, you’ll want the service manual. This user manual gives you the essential stuff: oil capacity (1.6 liters with filter change), fork oil weight (5W), and the spark plug gap (0.6 mm). Use a feeler gauge. The manual also has a wiring diagram for the turn signals and brake light – page 47 (one of the only two page numbers I’ll call out here). If you’re adding accessories, trace those wires before you blow a fuse.

Why the OEM Manual Beats a Third-Party Reprint

I’ve seen aftermarket “reprints” that drop the warning about tampering with the noise control system – that’s a legal violation in the US and Canada. Others omit the serial number boxes or the dealer stamp page. This is the original 2003 PDF from KTM, with all 55 pages intact. The print is sharp, the diagrams are clear, and every safety notice is present. Don’t trust a generic CD that claims to cover “all models”. Get the specific manual for the 660 SMC.

Does this manual include torque specs?

Yes – for critical fasteners like axle nuts and triple-clamp bolts. Full engine torque specs require the service manual.

How do I use this manual for routine maintenance?

Start by reading the safety section on page 2. Then turn to the maintenance schedule – about page 12. It lists each service interval in kilometers and tells you which parts to inspect or replace. For example, at 3,000 km you change oil and clean the oil screen, check brake fluid level, and inspect the chain for wear. The manual gives you the torque for the drain plug (20 Nm) and the oil filter cover (10 Nm). You will need a torque wrench that clicks at those values – a beam type works, but a clicker is faster. Follow each step in order. Do not skip the grease points for the linkage bolts. I’ve seen seized bearings because guys thought “it’s just a maintenance list.” Ignore one line item, and you’re buying new parts. If you’re also working on a different KTM, check out KTM 950 Adventure 2003 User Manual”>the companion manual for the LC8 engine. For the 990 Adventure, see KTM 990 Adventure 2008 Owner’s Manual”>this 2008 version. And if you have the Super Enduro, KTM 950 Super Enduro R 2008 User Manual”>that manual covers the same chassis family. For general transmission theory, Manual Transmission pages explain the basics – then apply what KTM tells you.

You need a manual that matches your bike’s year and model exactly. Access the Factory Manual for the 2003 KTM 660 SMC right here – no reprints, no third-party fluff, just the OEM document that came with the bike.