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Discussion Starter #1
First off I'm new to the forums so hello and thanks in advance. I have a 02 foreman 450 with 29.5 outlaws (and other mods). Saturday is was loading my bike on my trailer and halfway up the ramp I heard a loud snap and it just rolled back down. It shifts with no problem but it feels like it just won't catch a gear. If I engage 4x4 the front wheels turn but not the back. So far I have torn apart the diff and everything looks fine, so I put it back together and last night I pulled open the crank case but to be honest I'm no mechanic and I'm not sure what to look for. I'm really hoping I'm not going to have to open up more of the motor, any advise you guys might have or ideas on what to look for would be greatly appreciated.
 

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going by what your saying ^^^ , my money says you broke the output drive shaft ?, or u-joint at the output ?.
 

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I agree with shade,
them 29.5's ain't doing your drive train any favors!
I just don't bother trying to reason with owners anymore about what is breaking the drive shafts, u-joints, axles, you name it !. let them find out on their own is what I do now..lol.
 
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Shade I hear you, some times its wasted energy to say things
BUT< he's a new guy here, and WHO know
's maybe he doesn;t know??
as I gather a LOT of guys see things on TV/Video?YouTube and THINK its OK, not knowing anything really,
so some times, someone has to give actual info?

I guess I can add, that if he wishes to really run them BIG tires and I gather lift, maybe he needs to extend the swing arm some and other related parts, to allow for them big things
I HOPE he has a GR already, but never know??

or maybe just say, if you want to play, be ready to pay LOL
 

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Discussion Starter #6
First off thanks for replying, I did check the drive shaft and everything looked good. I'm worried it's going to be something inside the motor, I really don't want to have to pull it.
Second, the title of the thread is what broke, not why did it break. I'm not asking anyone to reason with me. I'm well aware of how hard these big tires are I don't need a lecture or to be talked down to. This is how you welcome new people?
 

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...Second, the title of the thread is what broke, not why did it break. I'm not asking anyone to reason with me. I'm well aware of how hard these big tires are I don't need a lecture or to be talked down to. This is how you welcome new people?
I think you know better, else you may not have joined these forums. The guys that post here everyday are doing it to be helpful, because they all like to help others a bit more than they care to be helping themselves. No one ever gets singled out and no one is ever left behind.

Feel free to start over... I request that you please revisit your current username decision? This forum is provided for full family participation, so we intend to maintain a healthy open environment that may be suitable for all contributors whom may wish to participate.

Thank you,

Welcome to the Forums!
 

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Itty , don't let them get you down and push their preferences on you , as far as I am concerned you are the one in the majority , " Everyone " I know who has a atv wants it modified to the max that they can get away with , if my bikes were stock I probably won't ride them as they wouldn't take me where I want to go , which is a place that some say I shouldn't be any way ------------ my philosophy is " listen to every thing you hear , and believe half of it "

did you jack the bike off the ground and turn the rear tire back and forth to listen for where a noise maybe coming from
 

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Discussion Starter #9
Thanks fishfiles. No i Haven't tried that yet, I'll try it later today. Another piece of information that may help is, when I took the diff apart and didn't find anything wrong I mocked it up where I just slid the axle through. When I put the bike in gear it would turn fine but once everything was back together and it was under load again no movement from the rear.
 

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First off thanks for replying, I did check the drive shaft and everything looked good. I'm worried it's going to be something inside the motor, I really don't want to have to pull it.
Second, the title of the thread is what broke, not why did it break. I'm not asking anyone to reason with me. I'm well aware of how hard these big tires are I don't need a lecture or to be talked down to. This is how you welcome new people?
and what some of us are trying to point out bro ?, is yes, I read the title !. what broke is most likely from those ungodly size tires. just because the guy that sold them to you said ''sure..thay atv can handle those tires all day long '' !. ummm..no..it can't !. the drive line becomes the weakest link in the atv when you toss tires on there that have to large of lugs ?, I've been doing repair work for 20 years, I've seen my share of what those tires will do. no one is telling you, you can't run them !, what we are trying to tell you is ?, it's not gonna be pretty in the long run :).
 

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Thanks fishfiles. No i Haven't tried that yet, I'll try it later today. Another piece of information that may help is, when I took the diff apart and didn't find anything wrong I mocked it up where I just slid the axle through. When I put the bike in gear it would turn fine but once everything was back together and it was under load again no movement from the rear.
worse case ?, the final shaft that is inside the motor snapped ?.
 

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Thanks fishfiles. No i Haven't tried that yet, I'll try it later today. Another piece of information that may help is, when I took the diff apart and didn't find anything wrong I mocked it up where I just slid the axle through. When I put the bike in gear it would turn fine but once everything was back together and it was under load again no movement from the rear.
Axle and Ring Gear splines stripped. When you mocked it up the splines were shifted just enough to "catch" and turn the axle. When everything was back together and centered up you were back on the worn part of the splines. Jack the bike up in 2wd, start the motor and put in 1st gear, open the diff fill plug (17mm wrench) and see if the ring gear is turning. My bet is that the ring will be turning when you look into the fill hole. This is a common problem on the foreman and rancher rear ends.
 
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hey I meant NO dis respect, as YOU being a NEW member, I have NO clue as to what you know or NOT, thus why I added some more info to the tread
I first agreed with the repair that shade gave you on possible WHAT WENT Wrong, on you!
and I again threw out the other info, so IF you decide to spend money to fix, and don' t know better(if you know the risks and are ok, have at it IMO)
by ME< saying what I didn't if you DIDN"T know them risks, you could maybe do things differently, thus my point to spend the time to add the info<
as again, your NEW here, and I have NO idea what you know or not!

I would also, ask, when you had axle out, did you measure the dia of the splines on the axle, as again, there weak links, when the left side axle/wheel bearings go bad, they let water in and that leads to them splines rusting out, and BOOM< NO rear wheel drive! very common problem on these honda models with like rear tubed axles!

splines MIGHT grab with NO load, but once a load is added, there NOT large enough to pull atv anymore!

do you have any wiggle in the left side wheel bearings?

OH and to be clear, all you guys that MOD the crap out of your atv;s
I"M GLAD you's do, as I said it many times before, without you guys doing so, things would stand still in development I think on ATV's
as OEM's don't feel the need to do as much as you guys do,
and lets NOT forget, many of you guys HAVE to do these mods I guess to ride where you's CAN,

up my way, however, your mods, are rather useless mods that just shorten life on parts, thus why, again, I don't recommend them, for LONG life.
Enjoy what you do, but I wouldn;t suggest on your first tread to bash those that offered you help either, as I only TRIED to offer honest advice and help?
 

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First off thanks for replying, I did check the drive shaft and everything looked good. I'm worried it's going to be something inside the motor, I really don't want to have to pull it.
Second, the title of the thread is what broke, not why did it break. I'm not asking anyone to reason with me. I'm well aware of how hard these big tires are I don't need a lecture or to be talked down to. This is how you welcome new people?
No they talk to everybody that way.
 

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Hey Newbie you spelled committee wrong

Download a manual from the site here to help your troubleshooting. No fault if you take it to the shop for fixing lotta nice people there
 

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Discussion Starter #16
Just wanted to post an update. Thanks to fishfiles' recommendation i was able to locate the problem, it was the splines on the axle. Cant believe i didnt see how bad they were the first time i had the rear end apart. I noticed they were worn but untill i really cleaned the axle i didnt see just how bad.
Anyway this isnt the first nor the last time i will fix something broken because of my "ungodly" sized tires. Lmao good thing parts are cheap. Thanks to everyone else who made suggestions trying to help. Mrbb dont sweat it, im really not that worried about other peoples opinons so its all good.
 

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DOn't worry I don't sweat things either, and I also said the splines on the axle too if you read my post too!(even gave you WHY they go bad??,as staying on top of them left side bearings will help prevent this again!) as again, the left side is the weak side KNOWN weak spot, right side has TWO bearings to last longer!


and a little FYI or food for thought for you

from your statement about NOT asking about WHAT caused the problem>>

if you never learn what causes a problem, all you will do is KEEP having it, so its honestly rather SMART< to learn what causes ANY problem.
As its how solutions can be made?

NOW if you don;t care about things breaking, so be it, but, I wouldn;t want to go thru life NOT ever learning what causes problems LOL
'
Glad you got it fixed, and back up and running
NO harm meant or taken here, just advice!
 

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and a little FYI or food for thought for you

from your statement about NOT asking about WHAT caused the problem>>

if you never learn what causes a problem, all you will do is KEEP having it, so its honestly rather SMART< to learn what causes ANY problem.
As its how solutions can be made?

NOW if you don;t care about things breaking, so be it, but, I wouldn;t want to go thru life NOT ever learning what causes problems LOL
'
Glad you got it fixed, and back up and running
NO harm meant or taken here, just advice!
I appreciate your advise but the reason i didnt ask why is because i knew why. I just didnt appreciate the " i dont even bother trying to reason with ppl" comment, like we had some long discussion. I knew exactly why it broke hence why i said i have 29.5s, if it was to brag i would have a laundry list of mods. But like i said, its all good, im a big boy and its in the past. No sense in dwelling over it. Thanks again.
 

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and a little FYI or food for thought for you

from your statement about NOT asking about WHAT caused the problem>>

if you never learn what causes a problem, all you will do is KEEP having it, so its honestly rather SMART< to learn what causes ANY problem.
As its how solutions can be made?

NOW if you don;t care about things breaking, so be it, but, I wouldn;t want to go thru life NOT ever learning what causes problems LOL
'
Glad you got it fixed, and back up and running
NO harm meant or taken here, just advice!
I appreciate your advise but the reason i didnt ask why is because i knew why. I just didnt appreciate the " i dont even bother trying to reason with ppl" comment, like we had some long discussion. I knew exactly why it broke hence why i said i have 29.5s, if it was to brag i would have a laundry list of mods. But like i said, its all good, im a big boy and its in the past. No sense in dwelling over it. Thanks again.
if you already knew what caused the problem ?, then why did you even bother to ask what might be broken ?, you shoulda already figured it had to do with something in the drive line, correct ?. from the sounds of it, your tires were already the problem, but you did not want to hear the truth as to what caused it !. anywayyyyyyyy..yes, to give you an example as to your axle splines, I had this very same problem with my '05 trx500fm I just finished restoring, on jack, was fine, under load, brand new ring gear splines were spinning on old axle splines, I then had to replace the axle, as I knew what my problem was.
 
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