2000 Grizzly 600
Top end overhaul
Tore this one down quite a while ago and finally had time to put it back together. I ended up waiting the longest for the machine shop to finish up with the cylinder which needed to be resleeved.
The owner had a friend rebuild it previously who forgot to put one piston pin circlip on... caused huge damage to the cylinder wall but still ran. Burned oil like crazy.
Now the pretty new parts
It took a long time to find a sleeve for this cylinder and then the machine shop ruined the first one and I had to track down another one...
There was serious carbon buildup on the valve train and whoever rebuilt it last time used an extreme amount of blue silicone... I hate silicone.
I'm a huge fan of Wiseco piston kits, price is good, good quality and gasket kits always fit.
Its always hard to decide where to draw the line on older machines with when to fix it or let it die. This one could easily become a money pit for the owner if he isn't careful. I went with only fixing the necessities to keep it running smoothly.
This one has a lot of cosmetic damage as well from pushing cows around and other such farm chores.
Thanks for reading through! Hope some of you liked seeing a bit of what goes into a quick top end repair on an ATV.
Peace.
I tackled that job once on my blaster/two stroke. I also used a Wiseco kit. I made the mistake of Milling down the head while I was in there. This gave it more compression. May not have been a good thing for a 2 stroke. I got it back together and took it down the street. I had that little fucker tacked out for about a mile. All of the sudden, it made a horrible noise. I had to rip it apart again. This time it was bottom-end. I ripped apart the bottom end and had no idea how to put it back together. I am not a mechanic. Thankfully I got it back together. I know now not to keep a 2-stroke tacked out for that long. Especially when you did modifications to the cylinder and head. It didn't even look cast before I put it back together. It was all nice, shiny, and Polished.
Two strokes rely on lube from your fuel so increasing load on the con rod/crank bearings is never a really good idea. Not if you want any sort of longevity out of the unit... lol! But its good for bragging rights.
True. I knew that but it didnt even cross my mind when i was doing it.
Those parts were dirty! 😱
Gotta love those wiseco pistons!!!
It's pink one!!! Don't forget to add a unicorn sticker when you're done: