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 & 115cc to suit either the normal Junior class  (100cc with  3 weights / Carb Restrictor sizes) or the Junior & Senior Extreme classes (115cc with 24mm Purple Carb Restrictor and Mandatory Clutch for Junior Extreme and No Carb Restrictor and Optional clutch for Senior Extreme). 100cc engines can inexpensively be upgraded to 115cc.

JUNIOR TKM (Junior 128 / Junior 136 / Junior 142)
New Junior 100cc engines come either in direct drive form or with a clutch. If clutched then an off-board lightweight electric starter is required at additional cost. To make for fairer, safer and closer racing suiting all sizes and weights of the Junior drivers whose ages in theory can vary from 10 – 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 128 with a min 128 Kg race finish weight use a 20.5mm GOLD anodised carb restrictor.

Juniors 136 with a min 136 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.

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

128 Gold band is 94 Kg / 136 Blue band is 89 Kg / 142 Purple band is 83 Kg

Driver must be a minimum of 34 Kg with all race gear to race in the Junior TKM 128 Band with Gold Carb Restrictor

Driver must be a minimum of 47 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

Junior Extreme
Uses a 115cc engine which mandatory clutch and 24.0mm Purple Carb restrictor. This larger capacity engine with its restrictor gives greater power for the more experienced Junior with a starting age of 13 yrs.

Senior Extreme
Uses same base 115cc engine as Junior Extreme without any carb restrictor. Can be raced in direct drive format, or with the optional clutch and electric lightweight starter. This larger capacity engine with no restrictor gives greater power for seniors with increased mid range torque. Conversion from Junior Extreme to Senior Extreme is now very easy and any clutched engine can quickly be converted to direct drive if required. 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.

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 100 hours between rebuilds.

	Information at a Glance
	Capacity   Juniors 128 / 136 / 142 100cc Junior & Senior Extreme 115cc Max Power   Junior 128 14.5 BHP with 20.5mm GOLD restrictor Junior 136 15.5 BHP with 22.0mm BLUE restrictor Junior 142 16.2 BHP with 24.0mm PURPLE restrictor Junior Extreme 17.6 BHP with 24.0mm PURPLE restrictor Senior Extreme 18.5 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 clutch option Weight   12kg engine only 14.5kg complete 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, Junior Extreme & Senior Extreme. Carb air restrictor takes only minutes to change engine power bands.