Hey all, I picked up an '02 blaster for $350 with a blown top end. I want to rebuild it for my 9 year old brother. It doesnt need to be made into some monster bike. I just want it to run and be reliable. My family lives in a village in alaska with little resources so I want to build a simple, reliable, easy to work on bike. I'll be deleting the oil injection system and rebuilding the top end. Other than that it wont get anything exciting.
The only modification I can see is FMF exhaust.
I am a 4-stroke guy and I've never rebuilt a top end before. The kickstarter was stuck when I got it. turns out it was because of metal chunks that broke off the piston. I flushed the bottom end out and now I need to rebuild the top end. Here is what the cylinder/piston looks like:
The piston is obviously toast. It looks like the previous owner tried to hammer on it when the kicker got jammed or something. There is some scoring in the cylinder that you can physically feel. It isnt awful or deep but it isnt smooth either.
The main question is can I just hone the cylinder and get a stock piston kit or will I need to bore because of the scoring on the cylinder? And if I need to bore what is the process? Do I have to send my cylinder somewhere to get bored out?
Any help would be appreciated. It looks like Vito's sells a complete top end big bore kit for a healthy chunk of change. If i can use a stock piston kit i'll rebuild it myself, but if i have to bore it might be cheaper for me to find a used top end on ebay or something.
Any opinions/guidance would be much appreciated.
The only modification I can see is FMF exhaust.
I am a 4-stroke guy and I've never rebuilt a top end before. The kickstarter was stuck when I got it. turns out it was because of metal chunks that broke off the piston. I flushed the bottom end out and now I need to rebuild the top end. Here is what the cylinder/piston looks like:
The piston is obviously toast. It looks like the previous owner tried to hammer on it when the kicker got jammed or something. There is some scoring in the cylinder that you can physically feel. It isnt awful or deep but it isnt smooth either.
The main question is can I just hone the cylinder and get a stock piston kit or will I need to bore because of the scoring on the cylinder? And if I need to bore what is the process? Do I have to send my cylinder somewhere to get bored out?
Any help would be appreciated. It looks like Vito's sells a complete top end big bore kit for a healthy chunk of change. If i can use a stock piston kit i'll rebuild it myself, but if i have to bore it might be cheaper for me to find a used top end on ebay or something.
Any opinions/guidance would be much appreciated.