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Discussion Starter #1
What are you'll thoughts on the 2002 450 Foreman foot shift 4x4x2 , I have a guy wants to trade me my Polaris 1999 500 for it , I am asking $1,200 but would take a $1,000 , he works for my friend and I have know him a year or so , his bike smokes 2 days after he bought it for his wife ---- mine cuts off electrically after about a minute and after 10-15 cooling off it starts back , think it is the cdi by feed up with dumping money into this unreliable money pit Polaris ------- I know a couple of people who have the 350 but no one with the 450 , good bike or not , can you pull the jug without pulling the motor out the frame
 

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450 is a pushrod engine. I can have the jug off mine in an hour or less. Pull tank plastics/tank/heat shield and you're looking at the head. I have 2, just as reliable as my 300's any day to the week. Plus use some of those 300 parts you have lying around for a free gear reduction. 300 primary and clutch basket make a 14% GR in the foreman, straight bolt in.
 

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Discussion Starter #3
I would have felt happy trading the Polaris for just the tires and rims off this bike , for those of you that notice , the jug is off the bike , I think they put a new stock piston in a jug that was extremely worn or previously bored -----double snorkels is double trouble , I am breaking one of my Golden rules , never buy a snorkeled bike , but I want to get Polaris out my life , permanently ------- good luck Ben
 

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Discussion Starter #4
Made the trade and got this 2002 TRX450FM , I was told they bought the bike for his wife and after 2 days it smoked , he took off the jug and found this piston , I didn't mic it but the piston fits very loose in the jug , it will wobble around in the hole , I think maybe they put a stock piston in a hole that was bored already ----------- what would cause a piston to deteriorate like this , no markings on the piston of who made it
 

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Discussion Starter #6
that is the question , the pieces of piston must be down in the case , I drained the oil and didn't see any chucks or specks from the pieces being ground up , I have a flexible tube inspection camera , I hope to be able to get it down there and see if I can see the pieces --------- what is weird is there are no bad marks in the bore
 

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I bet the piston fit loose and the gap made the piston bust apart
 

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Discussion Starter #8
I think you are right LBZ , you can see the gap between the piston and the wall of the jug ----going to mail the jug off to G+H this week ---------- what about a manual down load for the bike ? ------------ the search on this site never seems to work for me , when I do a search for 450 manual or ol'Pleasant Hill I don't get anything even closely related to the subject
 

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Discussion Starter #10
Thanks Mel , they are $6.95 which isn't bad , giving them my credit card is another story ---------------

I put the inspection camera down into the engine and never found anything , drained the oil . then flushed a couple of gallons of diesel thru it into a clean container and changed the filter , very clean , I doubt it has been sunk , really looks like some one put a piston that is marked standard into the cylinder that is worn or has been bored .010 , boxed up the jug , talked with G+H , mailing it tomorrow , $188 gets the boring , Shindy piston , rings , all gaskets and return shipping-------------
 

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The manual is free download from this site. I think kentco has the link in his signature. I downloaded one for my 450s a while back.
 

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Thanks Mel , they are $6.95 which isn't bad , giving them my credit card is another story ---------------



I put the inspection camera down into the engine and never found anything , drained the oil . then flushed a couple of gallons of diesel thru it into a clean container and changed the filter , very clean , I doubt it has been sunk , really looks like some one put a piston that is marked standard into the cylinder that is worn or has been bored .010 , boxed up the jug , talked with G+H , mailing it tomorrow , $188 gets the boring , Shindy piston , rings , all gaskets and return shipping-------------

Can't beat G&H.. lol I got one I'm sending them tomorrow as well..
 

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300 motor is completely different than 450.
 

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Honestly I have seen many atv engine taken apart. And the 450 seems to be the easiest by far. Could easily have top end apart in less then an hour.
Their good four wheelers all around. Like it's been said the 300's big brother
 

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Discussion Starter #16
Does any know the offset of the stock rims of this 2002 TRX450FM ? --------------right now the bike has after market rusted chromed rims with 27's Black Water tires , I like the tires but the rims are very deep dish , it is a little hard to measure but it looks like 10 inch wide rear rims with an offset of 7 inches out and 3 in , they stick out pass the fenders which I don't like for reasons of getting dirty unnecessarily and hitting trees on the tight trails ------ I am think maybe a 8 inch wide rim with a 4x4 offset would work but would like to know what is the stock offset ?
 

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Just measured an OEM front 6" rim.
Front: 4 1/2" + 1 1/2"

Didn't get a measurement for the OEM rear 7 1/2" rim. Sorry!

Just ordered Kenda Bearclaw EVO's yesterday ..... 26x9x11 fronts, and 26x11x12 rears. These will be mounted on the OEM 6" and 7 1/2" rims.
Like you, I don't feel the need to get dirty unnecessarily ..... therefore, OEM rims.
Good luck!
 

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Discussion Starter #18
Thanks, Mac' .. from your measurements , just as I thought my front are the wrong offset rims also , I also just noticed the rear width is 3 or more inches wider than the front width , I would like them to be even -------- I was going to get a set of some sporty alum. rims , and now I am thinking of just going with some used stock O.E.M. steel rims and a fresh paint job , Plain Jane
 

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Discussion Starter #19
Can't say how much I am pleased with G+H , the box has arriv'in , they bored it .025 and it had a standard piston in it , the walls were not scared , I think the P.O. stuck a new piston in a cylinder that was already bored for it to be that far off and show no signs of wear , $173 and the $13 it cost me to ship it to them , $186 total this time around for the bore , hone , piston rings and complete upper gasket set -------- but I didn't do my home work , I should have had every thing cleaned up and ready to go , just spent an hour cleaning the head and still have to change the seals and lap the valves , valves held the solvent test which is a good thing , dam dirt packed in the fins is a project , sure miss the bead blaster cabinet that went south on me
 

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-------- I was going to get a set of some sporty alum. rims, and now I am thinking of just going with some used stock O.E.M. steel rims and a fresh paint job, Plain Jane
Just measured the rear OEM's on my 450S. The offset is ..... 3" + 4 1/2"
The rim is stamped .... '12 x 7.5 AT 1606A8'
 
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