.It is not standard camshaft.Changing the large angle camshaft can increase the time of air inlet, change the engine performance, the power of the compression explosion increases greatly, and the horsepower and torque increase are significantly increased!
The camshaft is one  of the key components of the engine. The hardness of the cam tip and the depth of the white layer are key technical indicators that determine the service life of the camshaft and the efficiency of the engine.The large angle  camshaft can extend the valve opening time, increase the valve lift, and make the intake and exhaust valves open early and late, allowing more air to enter the cylinder to improve the engine's medium and high speed power and output.It can enhance 20% output power.
.Compatible for YAMAHA :
 TTR125 2000-2016
 TT-R125 2005-2016                                                                    
 TTR125E 2000-2009
.The original crank housing must be enlarged to fit the cylinder block, professionally and thoroughly.
.The gasket must be cut to fit the hole, avoiding abnormal sound.
.Please buy carefully if you do not have professional work.
.Pic shown is of exact item you will receive.
.Displacement (ml): 185cc
.Bore diameter :65.5MM(Not Standard 54mm or 150cc 57.5mm)
Package Includes:
  .1*UPGRADE 65.5mm bore cylinder block
  .1*UPGRADE  High Performance Camshaft
  .1*piston kit
  .1* ring kit
  .1*gasket kit
  .Installation Instruction NOT Included

.Important Notes: If you have any questions,Please feel free to contact us.