SKU PISTONKIT-TSP-300 Category Tags ,

TSP Top End Rebuild Kit – KTM, Husky & Gas Gas 300cc Carb & TPI Models

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Everything you need to rebuild the top end on your 2018+ KTM, Husky and Gas Gas 300cc Carb and TPI models.


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TSP Top End Rebuild Kit – 300cc Carb & TPI Models

This TSP Top End Rebuild Kit will fit KTM, Husky and Gas Gas 300cc TPI models from 2018-on. (It will not fit TBI models)  This is a complete top end rebuild kit that comes with everything you need to rebuild the top of of your 300cc TPI two stroke.

The TSP Top End Rebuild Kit includes:

  • Meteor piston kit with your choice of an A, B or C piston size. Piston kit includes rings, pin, circlips and a high quality cast piston. These pistons are made by Meteor in Italy and are THE BEST available. The current Meteor piston features a special coating on the crown to reduce temps of the incoming charge and reduce detonation. This is a cutting edge piston developed especially for KTM.
  • Top end gasket kit.  Includes two gaskets to achieve the stock 0.60mm thickness base gasket, power valve cover gaskets, copper washers and O-rings. All O-rings are the correct size and made from the correct material, unlike the cheaper aftermarket kits.
  • TSP little end bearing
  • EZ clips free of charge ($20 value) for ease of piston installation

TSP rebuild kits are put together by TSP using parts sourced direct from OEM manufacturers in Japan and Europe. The parts we select are THE BEST available for each make/model and many are the exact same parts as the genuine items.

Piston Sizing: ideally you should measure your bore with a dial gauge to work out the correct piston sizing. If you cannot do this then a general rule of thumb is to install an “A” piston on any new cylinder or a cylinder that was just replated.  Install a “B” piston on the first top end rebuild between 80 – 90 hours. Install the “C” piston on the second top end rebuild at 150+ hours.  The 300 C piston kit is unique to the TSP Top End rebuild Kit collection. TSP recommends a minimum piston to cylinder bore clearance of 0.07 mm.

Piston Diameters:

  • A Piston = 71.93 mm
  • B Piston = 71.94 mm
  • C Piston – 71.95 mm

9 reviews for TSP Top End Rebuild Kit – KTM, Husky & Gas Gas 300cc Carb & TPI Models

  1. Brian (verified owner)

    Everything I have from tsp has been extremely good quality and can’t recommended them enough

    (0) (0)
  2. Brian A. (verified owner)

    (0) (0)
  3. Zak Jackson (verified owner)

    Good service and fast shipping! 🤘

    (0) (0)
  4. Doug A. (verified owner)

    Steve was really helpful answering questions. Very responsive! Quick shipping too!

    (0) (0)
  5. TERRY CONSTANTINE (verified owner)

    (0) (0)
  6. John G. (verified owner)

    Products are of high quality and kit came with all the components necessary to do a top end rebuild. Shipping was fast and parts were well packaged.

    (0) (0)
  7. joseph w. (verified owner)

    Quite happy with the kit and customer service provided. I had some dumb questions and they were helpful and respectful. Parts arrived quick. I wouldn’t hesitate to buy from them.

    (0) (0)
  8. Matthew Nelson (verified owner)

    (0) (0)
  9. Jeremy P. (verified owner)

    (0) (0)
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Below are the make(s) and model(s) that will fit this part.

YearMakeEngine CCModel
YearMakeEngine CCModel
2018Husqvarna300TE Carb
2018Husqvarna300TX Carb
2018KTM300XC Carb
2018KTM300XC-W Carb
2019Husqvarna300TX Carb
2019KTM300XC Carb
2019KTM300XC-W TPI
2020KTM300XC TPI
2020KTM300XC-W TPI
2021Gas Gas300EC TPI
2021Gas Gas300EX TPI
2021KTM300XC TPI
2021KTM300XC-W TPI
2022Gas Gas300EC TPI
2022Gas Gas300EX TPI
2022KTM300XC TPI
2022KTM300XC-W TPI
2023Gas Gas300EC TPI
2023Gas Gas300EX TPI
2023KTM300XC-W TPI
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