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Discussion Starter · #1 ·
The rings are bad, I have determined this using the compression test stickied here. I have a few questions...

I plan on getting the Wiseco Piston kit, .020 over. Will this be ok? I am not looking for a huge bore, just something reliable.

Also while I have it torn apart what parts should I replace? Valve Guides/Seals? Valves? Springs? Etc. I tried checking all of these things but can't really see anything physically wrong with them, but who is to say they don't leak under pressure. I bought the quad for cheap and ran it until I could get sometime to tear into it.

Going by looks I will feel safe saying this one has never been rebuilt. (2001 model)

I was thinking replacing the cam chain as well? I hear they can be problems.

Any help is greatly appreciated. I just need more opinions. I am looking for reliability.
 

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The rings are bad, I have determined this using the compression test stickied here. I have a few questions...

I plan on getting the Wiseco Piston kit, .020 over. Will this be ok? I am not looking for a huge bore, just something reliable.

Also while I have it torn apart what parts should I replace? Valve Guides/Seals? Valves? Springs? Etc. I tried checking all of these things but can't really see anything physically wrong with them, but who is to say they don't leak under pressure. I bought the quad for cheap and ran it until I could get sometime to tear into it.

Going by looks I will feel safe saying this one has never been rebuilt. (2001 model)

I was thinking replacing the cam chain as well? I hear they can be problems.

Any help is greatly appreciated. I just need more opinions. I am looking for reliability.
i can't say much about over boring..as i stick to stock..but..if you do decide to bore it over..have it honed..new rings..new cam chain..top end gasket kit..check your oil pump..clean the bottom oil pick up filter ( dont forget to install it back ).i hardely ever replace valve springs..the valve guide seals yes !!..these should be in the top end gasket kit..the only gasket i never use..is the valve steem guide o-rings...you have to press the valve guide steems out to replace these..most ppl..including myself never replace them..get new rings..new oil filter..clean or over haul your carb..new spark plug ( in the right heat range )..and you should be good to go.
 

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Discussion Starter · #3 ·
Well it looks like I have some things to order. lol

Now that you mention it I will put clean oil pump on my todo list...


Fortunately I have a press to easily press the guides in and out. :)


Everything else has already been checked off... thanks for the input hopefully I can get a little more by the morning.
 

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Well it looks like I have some things to order. lol

Now that you mention it I will put clean oil pump on my todo list...


Fortunately I have a press to easily press the guides in and out. :)


Everything else has already been checked off... thanks for the input hopefully I can get a little more by the morning.
your welcome..someone else will come along and give you some tips on the rebuild.everyone here is very helpful..hang in there..it will live again !..lol
 

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I would just have it bored to the next oversize or just enough to clean the cylinder up from being scarred, out of round, or tapered. The cylinders tend to wear "egg shaped". Take the cylinder to the shop where you're having the boring done and they will be able to determine how much you need to bore to clean up the cylinder and what size piston and rings that you will need.
 

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.020 bore is only a 74.5mm piston you should be fine with that. if you take the head and clean it up (the piston side) you can dump some fuel on top of the valves let it set for a few and check the intake and exhaus ports if it's dry you're good to go just replace the valve stem seals, definitely a timing chain and the guides.
 

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Discussion Starter · #7 ·
Finally ordered the parts. I am ready to get this thing running again! Thanks for all of your help!
 
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