Quantcast
Jump to content

  • Do you own an ATV or UTV? Join our Forum!

    Join QUADCRAZY ATV Forum today for FREE! We keep these forums clean and user friendly. All first posters will have to wait to have their content reviewed and approved. Once your first post is approved, you will no longer need to got through an approval process. To gain immediate approval and a NO ADS experience, consider subsribing to our Premium Membership.

400ex a ton of black carbon on valves why


wheelewilly
 Share

Recommended Posts

My 2003 400ex has been smoking forever so I broke down and bought a new wiesco 416 piston and stage 2 hot cam,but when I tore it down the bottom of the head where the valves are was covered with black really hard carbon and I mean a lot also my spark plug was one big ball of the same stuff my head pipe looks the same inside is it valve seals or just bad rings Im going to replace the valves any way with the rebuild but I m just wondering if it could be anything else?

Link to comment
Share on other sites

Dream Car Giveaway

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...