This is the most popular engine raced in the UK. Originally a favourite in the USA where it dominated racing for several years. It has paved the way in low cost ultra close karting

For more than a decade it has been the power pack for the Formula TKM class where the accent is on equal cost effective racing for everyone, not just those with the largest pay cheque.

Although basically one engine type, this piston port style unit is available in two specifications 100cc for the Junior class with 5 weights / Carb Restrictor sizes and 115cc for the Senior Extreme class without Carb Restrictor except for the lightweight 146 class. 100cc engines can inexpensively be upgraded to 115cc.

Junior TKM ( 123 / 128 / 135 / 142 / 148 )
New Junior 100cc engines come either in direct drive, Horstman clutched, or TAG (Touch & Go). The Direct Drive unit is started old style traditional method. Horstman Clutched unit is started with a lightweight hand held electric starter supplied at additional cost and the TAG unit is started with a touch & go onboard starter system. To make for fairer, safer and closer racing suiting all sizes and weights of the Junior drivers whose ages in theory can vary from 11 - 17yrs the simple power to weight rules has been introduced.

Juniors can now all race together choosing what weight and power band that will suit them

Juniors 123 with a min 123 Kg race finish weight use a 19.5mm BLACK anodised carb restrictor.

Juniors 128 with a min 128 Kg race finish weight use a 20.5mm GOLD anodised carb restrictor.

Juniors 135 with a min 135 Kg race finish weight use a 22.0mm BLUE anodised carb restrictor.

Juniors 142 with a min 142 Kg race finish weight use a 24.0mm PURPLE anodised carb restrictor.

Juniors 148 with a min 148 Kg race finish weight. No restrictor required.

The switch from one junior power band to another takes just moments by simply changing the carb restrictor.

How to choose what band suits you taking into account the maximum permitted kart weight without driver ready to race for each band

123 Black band is 90 Kg / 128 Gold band is 88 Kg / 135 Blue band is 86 Kg / 142 Purple band is 83 Kg / 148 band is 81 Kg

Driver must be a minimum of 30 Kg with all race gear to race in the Junior TKM 123 Band with Black Carb Restrictor

Driver must be a minimum of 40 Kg with all race gear to race in the Junior TKM 128 Band with Gold Carb Restrictor

Driver must be a minimum of 49 Kg with all race gear to race in the Junior TKM 136 Band with Blue Carb Restrictor

Driver must be a minimum of 59 Kg with all race gear to race in the Junior TKM 142 Band with Purple Carb Restrictor

Driver must be a minimum of 67 Kg with all race gear to race in the Junior TKM 148 Band No Restrictor

Senior Extreme
Use the 115cc engine without any carb restrictor for the 152 & 165 bands, and with Blue carb restrictor for the lighter 146 band. Can be raced in direct drive format, with the optional clutch and hand held electric lightweight starter, or the TAG touch & go version. This larger capacity engine gives greater power for seniors with increased mid range torque. Horstman clutched engine can quickly be converted to direct drive if required by removal of the complete clutch and then fitting the special long direct drive sprocket & nut. Please note that direct drive engine with shorter style crank half can not be made into clutched engines without the fitment of a longer style clutch crank half.

How to choose what band suits you taking into account the minimum permitted driver weight in full race equipment.

146 Blue band No Min / 152 band is 68 Kg / 165 band is 80 Kg and drivers age must be 35yrs +.

There is no minimum driver weight restriction to race in the Senior TKM 146 Band with Blue Carb Restrictor

Drivers must be a minimum of 68 Kg with all race gear to race in the Senior TKM 152 Band with No Carb Restrictor

Drivers must be a minimum of 80 Kg with all race gear to race in the Senior TKM 165 Band with No Carb Restrictor

Both 100cc & 115cc TKM engines are built by Tal-Ko to its own exacting standards. Carefully developed regulations restrict tuning to very minor levels to keep down costs. So successful has been this policy that engines first made 10 years ago and more are still capable of winning.

So tough is the engine that it will often be used for a year by club racers without being serviced. In corporate use it powers the Club 100 karts used for as much 80 hours between rebuilds.

	Information at a Glance
	Capacity   Juniors 123 / 128 / 136 / 142 / 148 100cc Senior Extreme 146 / 152 / 165 115cc Max Power   Junior 120 13.6 BHP with 19.5mm BLACK restrictor Junior 128 14.5 BHP with 20.5mm GOLD restrictor Junior 135 15.5 BHP with 22.0mm BLUE restrictor Junior 142 16.2 BHP with 24.0mm PURPLE restrictor Junior 148 16.8 BHP with No restrictor Senior Extreme 144 17.5 BHP with No restrictor Senior Extreme 152 & 165 18.8 BHP with No restrictor Max Torque   10,500rpm Max Revs   15,500rpm sustained, 16,000 blip Style   Piston Port Carburettor   Walbro with no modifications permitted Ignition   PVL fixed Cooling   Air cooled Drive   Direct or Centrifugal clutch option Exhaust   TKM 2-stroke Starter   Remote lightweight electric for Horstman clutch option On board starter system for TAG clutched engine Weight   Direct Drive 14.5kg complete with all components Horstman Clutched Drive 14.8kg complete with all components TAG Clutched Drive 20.5kg complete standard battery and with all components TAG Clutched Drive 18.3kg complete LiPo battery and with all components Installation   Ultra easy fit onto any traditional 2-stroke kart Conformity   All engines must be race with minimal modifications. Rebuilds by Tal-Ko & local dealers Servicing   Servicing 8 – 20 hours depending on usage Classes   Junior and Senior Extreme. Carb air restrictor takes only minutes to change engine power bands.