2000 Magnum 325 - Polaris ATV Forum
Polaris ATV Forum
Go Back   Polaris ATV Forum > Polaris ATV Technical Discussions > ATV Repair and Maintenance

ATV Repair and Maintenance Having problems? Doing a rebuild? All Repair/Maintenance Discussions here.

LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 10-14-2013, 06:21 PM
mudlife450's Avatar
Junior Member
Member #39422
Join Date: Oct 2013
Location: Alabama
Posts: 3
2000 Magnum 325

Hello all. New to the forum. I picked up a 2000 polaris magnum 325 2x4 that had been sitting for a while. Cleaned the carb and got it running. I have rebuilt several atv's over the years (mostly yamaha, honda and suzuki) but this one kinda has me stumped. I am pretty sure it is going to need a top end, but wanted to run a couple things by you guys.

1. Runs but not great. Runs better with the airbox lid off. It can be idling and when I put the lid on it dies and spits and sputters when trying to restart. Take lid off and it starts right up.

2. It does smoke a little (light blue, oil), but at idle it is smoking like a freight train out the vent that attaches to the airbox. Give it a little gas and virtually no smoke coming out of that hose. Smokes more out of the exhaust at idle as well.

Any ideas?

Reply With Quote
Sponsored Links
PolarisATVForums is the premier Polaris ATV Forum on the internet. Registered Users do not see these ads, So Register, It's Free!
  #2 (permalink)  
Old 10-14-2013, 08:24 PM
Bruce!'s Avatar
Polaris ATV Legend
Premium Member
Member #193
Join Date: Feb 2009
Location: Port Angeles WA
Posts: 20,004
Welcome to the board!
I tried setting my password to "penis" but it said my password wasn't long enough...
Reply With Quote
  #3 (permalink)  
Old 10-14-2013, 08:41 PM
GaleHawkins's Avatar
Polaris ATV Junkie!
Member #39299
Join Date: Oct 2013
Location: Murray KY
Posts: 526
mudlife450 sounds like you are making progress and I agree it would be good to put some hours on it as is as long as you do not have knocking in the lower end.

We picked up a couple of the 325 Magnums and have a lot to learn. If opening the breather box makes it run better the lid intake duct may have insect, etc nest in it like a dirt dauber perhaps so I would run with it off in clean places if the filter is intact as in no holes until you find the air flow restriction.

What kind of oil did you change to before you started it up? More as in what weight?

You may want to change it every couple hours until it says clean if the old oil was dirty.

As I type I see the ZORO tool ad on the right side of the screen promoting Marvel Mystery Oil. I am a Sea Foam addict but for some reason bought some this summer while we were waiting on some parts and replacing all the rubber hoses. Since the oil lines were off (replace them before you ride much because they blow bad) we got some heavy clear plastic tubing and looped from the exit to inlet nipples (we have the Fuji engine) on that one and the other 2002 has the Robin (owned by Fuji) that has a different set up on oil lines.

Warning read with spark Plug REMOVED we dumped in two quarts of marvel Mystery Oil into the crank case with a new oil filter. We put some in the cylinder bore too to soak a few times. About twice a day we would spin it for about 30 seconds with the starter for a few weeks. We did pull the plastic port covers where you adjust the valves to replace them (they get smaller with heat) so we could see MMO was getting to the top of both the intake and exhaust valve train. By the way both of our tappet gaps where .020 when .006 and adjusting them make the top end more quite.

We now have to rebuild the carb that I was hoping we would not because it was loading up and just got worse. We did run it about 20 minutes after the MMO Marvel Mystery Oil and all was well as far as engine sound but it was smoking some but loading up like crazy. I do not suggest to others to do this but MMO is like 5 SAE oil I read.

What I would do with your 325 is with fresh oil and filter I would add either 3 oz of Sea Foam (per label on can) to the crankcase or 8 oz of MMO (20% of oil fill) and run it for an hour or two and check what it looks like on a white paper towel.

One cause of engine smoke (blow by) is the rings, piston and bore are worn out. Another cause is stuck rings (carbon build up) that permit burning of oil and blow by. Sea Foam and MMO were invented to soften carbon build up and they do it quite well for like 75 years now.

Again I would make some rapid oil changes and if I was using Sea Foam or MMO I would just grab some 15W-40 diesel motor oil in your area. Diesel motor oil is very high detergent. Getting your ring grooves and oil path ways cleaned out is important in my mind. Seriously if you will run this for two hours and drain into something clear or like milk jug you will wonder were all the black stuff is coming from. Diesel oil typically as more zinc which is good for our engines.

Even if you are going to rebuild the top end in time you want to de crude the oil flow paths in that 12+ year old engine.

As long as the oil gets black quick I would only ride at low speeds say 30 MPH on the road. The objective is NOT high RPM's when cleaning carbon out of any engine with stuff like SF or MMO but it hours of run time that does the work. I think four 15 minute rides a couple hours apart will remove more carbon than one 1 hour ride.

De carboning a 325 can also help clean the radiator serving as an oil cooler.

Welcome and keep us posted if changing the oil every couple hours helps with the smoking.

If starting with a new filter I would not keep changing the filter each time until I was going to leave the oil in it for a while. They really need synthetic especially if ran hard. If old and ran hard I think changing the oil at 25 hours makes more sense for us that just use them has mules around the farm. I would say riding dusty trails hard for 8 hours might justify an oil change if it does not look like new. I find over time doing short change intervals in an old engine they will start staying cleaner longer because the oil pathways finally become unclogged completely. I learned the hard way dirty oil can cause the oil system by-pass valve to hang open giving little oil pressure in a GM engine.
Reply With Quote

Lower Navigation
Go Back   Polaris ATV Forum > Polaris ATV Technical Discussions > ATV Repair and Maintenance

Search tags for this page

2000 325 polaris magnum parts

2000 polaris magnum 325 4x4 adjusting valves
2000 polaris magnum 325 oil line recall

2000 polaris magnum 325 oil lines


2000 polaris magnum 325 oil type

2000 polaris magnum 325 plastics

2000 white 325 magnum polaris quad

magnum 325 tappet adjustment

polaris magnum 325 2x4 check oil


polaris magnum 325 forum

polaris magnum oil cooler check valve
why does my 2000 polaris 325 magnum make skerching noisewhen trying to start it
Click on a term to search our sites for related topics.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
2000 325 magnum grubster ATV Repair and Maintenance 0 07-04-2013 05:56 PM
First ATV - 2000 Magnum 500 4x4 olinecoach1 Polaris Magnum 3 05-29-2013 06:15 AM
2000 Magnum 500 4x4 olinecoach1 Polaris Magnum 5 05-26-2013 09:14 AM
New guy with 2000 Magnum 500 LEARNING ATV New Members 1 04-25-2013 05:56 PM
2000 325 Magnum Johndoe ATV Repair and Maintenance 2 08-14-2012 09:45 PM

All times are GMT -8. The time now is 07:54 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.