BIHR 165 cc Piston Kit - without Homologation

The increase in displacement is achieved by a different piston diameter (from 57 mm to 65 mm), the cylinder needs to be resleeved and drilled out.

The kit for the conversion to 165 cc contains these items:
- piston and piston rings
- piston pin and clips
- cylinder head gasket
- cylinder sleeve

Suitable for:
- all TW125
- all SR125
- XT125 (not XT125X/R from 2005)

Important information:
Additional parts are required for a correctly and safely funktion of the engine.
You can find a list of other recommended parts in the "Engine Conversions" category.

Installation tips and what you can do yourself when installing the 165cc piston kit (Link to the www.bigwheels.fr forum)
(This article was written to the best of my knowledge and belief. I assume no liability for any damage to my own vehicle that may have occurred during or as a result of the conversion.)
This guide was written for the 165cc piston kit for the Yamaha TW125. However, it can also be applied to other motorcycles.