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Old 01-09-2017, 08:05 PM   #1 (permalink)
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2000 TRX450F to 2002 TRX450FE

I have a 2002 Foreman 450 ES and I have rebuilt the top end twice now. The first time was done by Southern Honda Powersports and the second time, by me. After both rebuilds, it started smoking. Now I have found an engine off of a 2000 Foreman 450 F, I know that the engine will bolt right up to my wheeler but what I don't know is whether or not I'll have to change the wiring harness. Are the harnesses the same for both year models? Any info on this will be much appreciated, and thanks for reading!
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Old 01-09-2017, 08:14 PM   #2 (permalink)
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welcome to the forums. yes, you SHOULD swap/replace the wire harness in order for it to work right. or, you could just convert the manual shift motor to es ?, but i'd be stumped as heck if ya went that route !!!..lol. es models..well...SUCK !..LOL was this motor ever sunk ?, was it split all apart, and washed out if it was sunk ?, if not ?, no matter how many times you '' rebuild '' it ?, it won't last unless the motor is torn apart, flushed, cleaned, washed out the CORRECT WAY !. now the 64,000 question is , how much time do you want to invest here ?, how much cash you have on hand ?, do you really want a long lasting motor ?, or you gonna cut corners, and half azz it ??..lol. where are you in TN ?, you close to north little rock,ar ?. if your close to me ?, got some spare time and little cash ?, load that puppy up, make a road trip to me, and we'll tear it apart, and fix it, wayyyyyyyyyyyyy lower cost than a dealership..lol.
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Old 01-09-2017, 08:27 PM   #3 (permalink)
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Yes I sunk it in a creek and if the Honda dealer didn't split the case then no it hasn't been split and cleaned. Though I did have some problems with ithe after I got it back from them turNed out that it was the timing chain but a friend of mine may have split the case then, I know he didn't clean it but thought it might be worth mentioning. But thinking about it, I would say the dealer wouldn't split it for a top end rebuild. And yes, I would like to have a long lasting engine for this wheeler. If i can help it, im going to do it right, without cutting corners. I bought a brand new 2016 500 Foreman just because I was tired of fooling with the 450.
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Old 01-10-2017, 09:31 AM   #4 (permalink)
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Where are you in TN?

Harnesses are not the same, but I'm guessing that would be due to the selectable 4wd being offered on the 02-up

32100-HN0-770 WIRE HARNESS $235.49

Engines will probably swap in BUT do you know the 2000 motor hasn't been sunk?

Point being, if you're going to go through the trouble of pulling your motor, rebuild it and put it back in. Then you know it's done right, and if you do the work it shouldn't cost you an arm and a leg.

And you have another bike to ride in the meantime.

Welcome to the forum.
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Old 01-10-2017, 07:47 PM   #5 (permalink)
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Thanks, I live in Jasper, it's about 30 minutes from Chattanooga. I don't know if the other engine has been sunk, the only thing I know about it is that the guy says it's good. And I can't hear it run beforehand either because it's not mounted
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Old 01-11-2017, 08:26 AM   #6 (permalink)
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Id split the motor you have, but first pull the top end off and check for play in the connecting rod on the crank.
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Old 01-11-2017, 08:30 AM   #7 (permalink)
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I'd rebuild what you have. If you take the time to clean out the bottom end well, you will KNOW it is good.

Slapping a used motor in is a gamble. You might get one that has been sunk, has a worn out timing chain, or worse, bad crank.

How cheap is it? If it's cheap cheap, buy it and rebuild it on the bench, then swap it in.

I just picked up an extra 500 motor. I'll go through it on the bench, and then when one of mine needs any major work, just swap that one in and work on the other one as time permits, and on the bench.
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