KTM 85 SX User Manual (English)

Other manuals for KTM 85 SX

Questions and Answers:

K
kyle49Aug 22, 2025
What to do if KTM 85 SX engine is overheating?
- M
  Megan SuttonAug 22, 2025
  If your KTM Motorcycle engine is overheating, it could be due to insufficient liquid in the cooling system, clogged radiator fins, frothing in the cooling system, pinched water hoses, incorrect ignition timing because of loose stator screws or an incorrect compression ratio. To resolve this, top up the coolant and bleed the cooling system, checking for leaks. Clean the radiator fins with a water jet, renew the coolant using a branded anti-freeze/anti-corrosive, replace any incorrectly routed hoses, readjust the ignition timing and secure the screws, and measure and adjust the compression ratio.
M
Mary GentryAug 25, 2025
Why is my KTM 85 SX engine spluttering into the carburetor?
- P
  pterryAug 26, 2025
  If your KTM Motorcycle engine is spluttering into the carburetor, it could be due to a lack of fuel, a spark plug with an incorrect heat value causing ignition by incandescence, or the engine taking in air uncontrollably. To fix this, clean the fuel pipes, examine the tank aeration, and clean it. Also, fit the correct spark plug and check the intake flange and carburetor to ensure they are firmly secured.
A
Abigail KellyAug 27, 2025
What causes a KTM Motorcycle engine to not rev up and run in a four stroke cycle?
- M
  mitchellmarieAug 28, 2025
  If your KTM Motorcycle engine revs aren't up and it's running in a four-stroke cycle, the carburetor may be overflowing due to a level that's adjusted too high, a dirty or enlarged float needle seating, or loose carburetor jets. Clean the carburetor, and if necessary, replace the float needle and adjust the level. Also, tighten the jets.
D
dtrevinoAug 30, 2025
Why KTM Motorcycle engine without idle running?
- R
  Ryan HernandezAug 30, 2025
  If your KTM Motorcycle engine is not running smoothly at idle, it may be due to an improperly adjusted idle screw, damage to the ignition system, or general wear. Readjust the idle running or replace the idle adjusting screw. Also, examine the ignition system and consider overhauling the engine.
C
calvin38Sep 2, 2025
What causes high rpm misfiring in a KTM 85 SX?
- K
  Karen CarrollSep 2, 2025
  If your KTM Motorcycle engine is misfiring at high RPM, it could be due to an incorrect heat range spark plug or a low-quality spark plug, or a loose, corroded, or non-conductive ignition socket connector. Refer to the technical data section for the correct spark plug and check and seal the ignition socket connector with silicon.
A
Anna SchneiderSep 5, 2025
What to do if KTM 85 SX engine has not enough power because of reed valves?
- R
  Ryan PrattSep 5, 2025
  If your KTM Motorcycle engine lacks power and has reed paddles that are tensionless or damaged, or if the surface of the reed valve housing is damaged, you should replace the reed paddles or the reed valve housing. Also, consider overhauling the engine due to wear.
J
John TorresSep 7, 2025
Why is my KTM 85 SX emitting white smoke (steam)?
- F
  Felicia WilliamsSep 7, 2025
  If white smoke (steam) is emitting from your KTM Motorcycle, it indicates a leak in the cylinder head or O-ring of the cylinder head gasket. You should check the cylinder head and replace the O-ring.
J
Joshua SpencerSep 10, 2025
Why is excessive oil escaping from the transmission breather tube on my KTM Motorcycle?
- T
  Tonya RodriguezSep 10, 2025
  If excessive oil is escaping from the transmission breather tube of your KTM Motorcycle, it is likely due to an excessive quantity of oil in the transmission. Correct the transmission oil level to resolve this issue.
J
Justin LittleAug 19, 2025
Why does my KTM Motorcycle engine have not enough power?

KTM 85 SX Specifications

General

Engine Type	1-cylinder, 2-stroke engine
Displacement	84.9 cm³
Starter	Kickstarter
Transmission	6-speed
Cooling	Liquid cooled
Front Brake	Disc brake
Rear Brake	Disc brake
Weight (without fuel)	68 kg
Front Brake Diameter	240 mm
Rear Brake Diameter	220 mm
Front Suspension	WP XACT USD, 43 mm
Fuel Tank Capacity	5.2 l
Front Tire	70/100-17
Rear Tire	90/100-14
Bore x Stroke	47 x 48.95 mm
Wheelbase	1, 290 ± 10 mm