please notice !!! if you want to check you servo if it opens 100%, take off your chain and put your bike in 3rd gear
the distance between chain slider and chain needs to be at least 45mm (see picture)
What do I need to do after pressure cleaning my bike ?
Dry the bike as good as possible with air.
Drain the carburator floater bowl
Open de ignition cover , clean out possible moisture and spray in the fly wheel with Silicone spray or WD40
Lubricate the chain
Spray the bike with silicone spray or shine spray.
Place a fresh airfilter
Do I need to grease the bearings when my bike is new ?
The TM bikes come with a good load of grease out oft he factory – so no worries when the bike is new.
Please clean and re-grease the steering bearings, swingarm & linkage after 10 hours and than every 25 hrs (at least)
How much oil does my gearbox need ?
the 85/100/125/144 needs 550cc of 2stroke gearbox oil
the 250/300 needs 700cc of 2stroke gearbox oil
all engine have oil level screws – but they just tell you if you have oil in the gear box, but not the oil level height.
so if you can‘t remember if you put in new oil, use this screw to check if oil was added
You can find all the gearbox oil here:
Which gear set up would we recommend on the 2015-.... models ?
on the 85/100 16/51 for sand tracks and 16/49 for hard pack
on the 125/144 13/52 for all kind of tracks (all 125/144 in the US come with a 6 gear gearbox)
on the 250 14/50 for most of the tracks
on the 300 14/48 for most of the tracks
Which clearance do I need when changing the piston ?
If you change your piston please notice that piston rings are all the same size … so normally you need to shorten the ring to get the right piston ring gap
we recommend a gap of
an „A“ piston will have a clearance of
0.07mm on the 85/100 – 47.87
0.06mm on the 125/144 – 53.94 / 55.94
0.07mm on the 250/300 – 66.33 / 71.93
we recommend the 2 ring pistons for performance improvements
85/100 (not available as 2 ring piston – use the OEM one)
125 (OEM has a 2 ring Vertex piston 53.94 – 53.98)
144 (OEM has a 2 ring Vertex piston)
250 (OEM has a 2 ring Vertex piston) or (PROX offer a 2 ring piston)
300 (OEM has a 2 ring Vertex piston) or (PROX offer a 2 ring piston)
Which squish do I need to run on my 2 stroke bikes ?
The squish is the distance between the cylinder head and the piston (messured at the cylinder sides at the postion of the piston pin)
TM offers different cylinder gaskets, so you can adjust the squish for your personal preferences
we recommend a squish of
to improve your performance you can get the VHM heads with special squish and head volumes
those parts really work and are available in our webshop