2002 Blaster Engine Rebuild??

[Miket1188]

Hi I am new to this forum and new to the ATV world in general. I have purchased an 02 blaster for my son. The engine came uninstalled from the atv. It also came in 3 pieces, minus the piston. I was told all it needed was to put in a new piston and rings. I'm fairly mechanicly inclined, but I have no idea where to start this project. I guess my main questions are:

1. It seems that boring out the cylinder is fairly common, if this has already been done, how do I find out what size piston to purchase.

2. Ive been told not to mess with the lower end, due to the complexity of reassembling it , should I leave it alone or rebuild the bottom too? How can I tell if it needs it?

3. Is this something that a novice should even attempt? ive priced out having the engine rebuilt at a shop and it will cost upwards of $700 dollars. Like I said i have the tools and the space, I have basic mechanical knowledge.

Thanks for any input .

 

[Awk08]

i believe the answers to all your questions will be found in the specs section of the manual, measure bore to piston clearence, check big end rod bearing play, ect, ect.........

http://www.rydindirty.com/blastermanual.pdf

and $700 sounds too high ???

 

[scotj77]

def order a clymers manual about 25 bux on ebay. that will become your bible for the next few weeks. lol this forum is all about doing it the right way first so excuse us if we jump down your throat for trying to half ass anything. lol

to answer your questions.... boring the cylinder is only needed if it is worn beyond specs. you will probably need a shop to measure that for ya. bring the piston too so you are sure what size it is. as for the bottom end. it's not that complex but you do need a few specialty tools to, split the cases, remove the flywheel, and pull the crank. a flywheel/clutch holder is also a great tool to have. all can be found on rockymountainatv.com . check the rod for any up and down play. I mean any!!!!! sided to side there will be some. also inspect the washers on either side of the rod. they should look identical to each other. if not you probably have crank problems. When i bought my blaster i knew jack and I have built it from the ground up. it's not that hard but a manual is a must

 

[bigwill]

Where are you located? We have tons of members who can help if your close. Also if you think diving into the engine is a bit much once you price out the specialty tools there is always this option, index . I don't know if its something ken would do, but it never hurts to ask.

 

[Awk08]

I don't know if its something ken would do, but it never hurts to ask.

one call does it all !!!!!!!