XR650L Porting Question

4 replies to this topic
  • machman

Posted November 04, 2006 - 11:40 AM


Hey guys,

Who here has ported and/or polished their own head and/or could tell me exactly what needs to be done?

  • goblin127

Posted November 04, 2006 - 06:37 PM


The last I knew you wanted to keep the intake sorta rough so the air fuel mixes well,and only polish the exaust and match that to the exaust.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • cantregister

Posted November 07, 2006 - 01:57 PM


I asked the guys at XRs only about porting, their response was don't. He said that XRs respond with very little gain, and if not done just right you will actually lose power at low and midrange rpm.

  • rebelventurer

Posted November 07, 2006 - 03:33 PM


If you want hp gains your money is best spend on a good set of stainless valves with the nitromeg coating, and kibblewhite springs and hrc camshaft in the head dept. You can go oversize valves but get ready to spend some $$$$ leave the ports alone especially the intake!

  • machman

Posted November 08, 2006 - 08:17 PM


I'm cool with leaving the ports alone. Less work = less money/less risk

Related Content


Post Apocalypse, ThumperTalk style! by Justin Pearson

Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  35 replies

Fell Off Trailer by usafxr

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  43 replies

Supercross Preview 2017 Part 1: Championship Contenders by Chris Cooksey

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  186 replies

Wiseco 101MM Spark Knock Low Engine Temps by imandrewparks

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • 9 replies

Honda XR650L 2016 by Chris.GVS

Honda XR650L 2016
  • - - - - -
  • 0 reviews

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.