Drilling out exhaust

4 replies to this topic
  • glabudde

Posted November 08, 2005 - 10:25 PM


One of mods to uncork is to unrestrict the exhaust. New HRC tip is around $115. Lots of talk about drilling existing out with a 2-inch hole saw. Is that all it takes? Will the spark arrestor still be in place, local ohv park requires spark arrestor and they check each visit? Any pics of others so I can get a feel for how to do this.

  • kehale

Posted November 09, 2005 - 01:06 AM


yes, a hole saw.. you can't drill out the spark arrestor.
Why not pull the three bolts to see what it's like on the inside?

Also, tie your bike down (with the insert installed) when drilling. it will tip your bike over if you don't. Tie down in your truck or whatever. :applause:

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • bootlegger2

Posted November 09, 2005 - 04:19 AM


check this out they have pictures of how to's

  • roadcam

Posted November 09, 2005 - 06:47 AM


yes, please retain functionality of a spark arrestor, no matter which mod you settle on ... forest fire country folk get riled easily, we've lost a lot already :applause:

  • babbs

Posted November 09, 2005 - 09:21 AM


Take the tip out of the bike and secure it in a vise or with vise-grips. Use plenty of oil when drilling, the holesaw will heat up and it will smoke like hell, but it will work.

Related Content


XR650L super moto wheels by greggkklee

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  29 replies

2015 XR650L Squeaking noise by Crayjay

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

Wiseco 101MM Spark Knock Low Engine Temps by imandrewparks

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

ignitech programmable XR650L CDI by brianhare

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  60 replies

Would a Young Scott Summers still be Competitive today on an XR600R? What would he ride to be competitive today? by Jayzonk

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  159 replies

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.