TS 50 Maintenace

Part 1: TS 50 1st time start up and maintenance procedures. 

Part 2: TS 50 Starting issues.

Part 3: Clutch talk

Part 4: water pump talk.



Before starting the entire list should be accomplished.

The bike comes with oil in it but there is no way to verify the amount, it’s best to drain it and measure10oz of any good gear oil like Kawi 80/90, Walmart carries this. The drain bolt is on the very bottom, careful not to over tighten the drain bolt, just needs snugged up good.

Service air filter with air filter oil like K&N oil from Orielly's.  If you don't do this sand dust will go right through it and gum up your carb and ruin your top end. Oil gas mixture 40:1, preferably good synthetic 2 stroke oil such as Klotz. If it seems too boggy you can adjust the small brass fuel screw next to the idol screw inwards. You can also lien the oil to 50 to 1 as well. Make sure you use 91 to 93 pump gas. Do not use high octane fuel OR pre-made fuels it won’t run right.

Make sure everything on the bike looks correct and nothing is loose.

Make sure tires are aired up. they come low on air so they aren't stressed in the create.  Pressure should be 15 to 20 lbs

Pull choke up and twist to keep it up and turn idol screw all the way in and kick start it. You shouldn’t have to give it any gas to start.

Once started turn choke off and adjust idol screw to set idol. To warm the bike up: put bike on a stand with back wheel in the air and slowly start to give it gas until it can take full throttle and running smoothly.

Its best to do a few heat cycles to break the engine in. means get it warmed up and shut it down until it cools then get it warm again.

Always ride safe, wear a helmet and proper gear.



Change the clutch oil in the dirt bike every two to four hours of ride time with 10oz of Kawi 80/90. Carful with oil drain plug.

Air filter should be cleaned and re sprayed every 2 to 4 hours of ride time.

Keep bike clean and oil the chain with chain lubes every time you ride it.

Change the spark plug if bike is not wanting to start or not running as good. 2 strokes foul plugs often. Spark plug is NGK BP7HS if this isn't in stock the auto parts store can cross it over.

Go over the bike and make sure nothing has come loose on the bike before rides and be sure not to over tighten anything! 

Rear wheel spokes will usually come lose with hard riding and will need to be evenly snugged up around the wheel.

Engine bolts can come lose with vibration, make sure these stay tight, if they go unchecked it could cause a broken engine mount.

The automatic clutch will wear over time and will need to be changed. You will know when it has worn down when it’s not taking off as hard or going as fast or can even want to move when it’s just idling.

If you cannot rev up the bike on the ground some without it moving the clutch is getting weak, see clutch section.



If your bike is having a hard time starting or not starting, here are things to check

If your bike is running bad: Make sure you have good fuel, 91 to 93 pump gas and the mixture is correct in the 40 to 50 to 1 range.

Change spark plug, even if it doesn’t look bad, it can still be bad.

Weak stator or coil

Dirty filter, or dirt in carburetor.

Compression in top end getting low and ready for a rebuild, you will just need a piston kit, you shouldn’t need a cylinder and piston kit. Top ends generally last 20 to 40 hours.

If bike will not start at all: Remove and change spark plug and check and make sure it’s firing correctly, if it’s not firing, change the coil and stator.

If it is firing good, it should be a fuel issue in the carburetor. Clean the carburetor jets or replace it.

If bike still won’t start and you have fire and fuel, it’s more than likely it needs a new top end kit.

You can do a compression test with a test kit from the auto parts store, install it where the spark plug goes and kick it several times with the throttle wide open, compression should be over 100 and up to 120 to 130. If compression is below 100 you will need to rebuild the top end.


Part 3: Clutch talk  JKS TS 50 Clutch Parts and Kits – JKS Powersports LLC

You will need a 2008 KTM 50 clutch puller to remove the clutch, they are on amazon.

Clutches are now built at the time of ordering, so they are fresh and ready to go.

This ensures you are getting a fresh clutch that hasn't been sitting on the shelf with the washer stacks compressed. 

If you cant rev your bike up some without it moving, your clutch is getting weak.

You can freshen your clutch with new pads and stacks without having to purchase a complete clutch or you can ad very thin washer at the bottom of the stack shown below.

Stock: From bolt head to pad. )()()()()

Also stock for super hard hit  )()()()()| has a very thin shim at bottom of stack and this is how we build and send them to you.

Adding shims: From bolt head to pad. )()()()()|| this is for when it gets weak, these washers added need to be paper thin.

This is to keep your clutch hitting hard at higher rims. Don't add any washers or shims until the clutch is engaging to early as you can go to far with it and the clutch won't engage, this is a very fine line. 

For beginner parents that want your bike to take off like a pw flipping the top washer around and remove the bottom shim will make it engage when you barley touch the throttle, if to much put the bottom shim back in.

From bolt head to pad (()()()()


Part 4: Water pump talk. JKS TS 50 WATER PUMP PARTS AND KITS – JKS Powersports LLC


2 bearings




Screw : make sure this gets lock tight, it will back out and ruin you water pump.

Make sure when you rebuild this, your bearings and seal stack up is together tightly and the water pump turns freely before install.