Fishfiles 20,147 Posted January 18, 2021 28 minutes ago, Airbusboy said: Update..... I think I pulled it off. black goo stuck to it. It was almost the consistency of super-fine/600 grit valve grinding compound. That is a good description black goo grinding compound ---- give it time , the dreaded black goo usually takes between 50-100 hours to do it's thing Share this post Link to post Share on other sites
_Wilson_™ 6,591 Posted January 18, 2021 thanks for the update, your better off with that 03 then a new bike, and good choice going with a magnetic plug (thumbs up) Share this post Link to post Share on other sites
Airbusboy 14 Posted August 8, 2021 (edited) UPDATE.... I wasn't happy with the smoke coming from the exhaust. Overly worn valve guides I assume from the lack of oil during my screw-up. My solution was to buy the Rancher Big Bore Kit that included the head assembly off the Ebay dealer at about $240. The kit arrived and quality looked good. I did the swap and she fired up nicely. The kit took it from 329cc to 355cc. I've already noticed an increase in power during the break in period and no smoke! I've changed the oil and filter 3 times already and find very little (and decreasing) substance stuck to the tip of the magnetic oil plug and zero visible particles in the filter pleats. Oddly, she is running better than ever. I plan on changing the oil and filter one more time before hunting season starts and after that....roll the dice, but so far, she looks good! Thanks for all the help, folks! Edited August 8, 2021 by Airbusboy 1 Share this post Link to post Share on other sites
jeepwm69 7,719 Posted August 9, 2021 Good deal. Let us know how that 355 top end holds up. I looked at that when I rebuilt the kid's 350 but decided to leave it stock. Share this post Link to post Share on other sites