My 05 Honda 450R went KABOOM!!! Carnage pics inside! - Ford Powerstroke Diesel Forum
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post #1 of 37 Old 02-28-2008, 02:17 PM Thread Starter
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My 05 Honda 450R went KABOOM!!! Carnage pics inside!

Well, took the quad out on the lake this past weekend, the local oval was closed and unplowed, so we hit up the drag strip. Well I dont know if this was inevitable or not, but it happened... my buddy happened to be on it when it let go, but it wasn't his fault really. My guess is the piston just got way too hot and seized in the cylinder, which caused the mayhem you see below....

He was in 5th gear, nearing rev limit... and it locked right up, upon first inspection you can see the two holes punched through the cases... :ermm:

First two pics are behind the cylinder...







These pics are from in front of the cylinder







Piston looks like it got a little warm eh? Notice how it is slightly turned inside the cylinder... also notice how it slid right out with the cylinder, and is still in the cylinder now...



Bottom side of cylinder and piston, both are trashed. Cylinder was hit in the back part right where the rod pushed through the case. Notice the cylinder is busted, the piston is also broke. I haven't tried removing it from the cylinder yet, but I'm sure it wont be easy, not that it matters, both are junk





Bottom end... you can see the wristpin and end of the rod laying right on top. The bottom end is filled with cylinder bits and rod pieces...









I haven't taken it apart farther than this yet, as I want to save some cash and gather parts together first. If anyone has any leads on center cases, please let me know thanks.


Luckily out of all of this, the head is still perfect. The valves and plug both look nice chocolatey brown which tells me jetting was good. Oil in it was really fresh and was still red when I took it apart, coolant was also relatively fresh. iI think the all out riding on the lake was just too much for it too quickly. I did take pics of most of the tear down, and hope to get a write up posted as I go along on how to rebuild the 04/05 450R motors bottom to top. It wont be for a bit, because I need to save some coin first.





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post #2 of 37 Old 02-28-2008, 02:21 PM
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Salvage yards and Ebay. Expenssive repair, I would find a 250R liquid cooled engine on ebay or somewheres. Rebuild it and put it in the frame.

Really does suck, this is the second honda engine I seen this happen too. The other was in a Dirtbike with the same size engine.


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post #3 of 37 Old 02-28-2008, 02:25 PM
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the 450 yamaha and honda are known for that there not meant to be held wide open but more of a track where u hammer let off style riding i have seen a few yamaha 450 do it only herd of hondas

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post #4 of 37 Old 02-28-2008, 02:34 PM
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The '05's are notorious for seized crank bearings. But If you piston is getting that hot then you either had no oil in it or had somethin wrong with the radiator or cooling system making it over heat.
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post #5 of 37 Old 02-28-2008, 02:37 PM
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Well that really sucks. My first thought was what the heck does he mean on the lake. It's 70 degrees here today. I guess the lake is frozen over.

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post #6 of 37 Old 02-28-2008, 02:43 PM
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For new Honda parts check out Hidy Honda. Troy, Ohio Honda, ATVs, Motorcycles, Scooters, Watercraft, Power Equipment, Generators, Lawn Mowers, Pumps, Snowblowers they have some of the best prices I have found.

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post #7 of 37 Old 02-28-2008, 04:43 PM Thread Starter
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hahah thanks guys. It was full of fresh klotz 10-40 motor oil, antifreeze was full and good. I know what I'm doing here... I know its not supposed to be held wide open for the `1/4mile strip for mutliple runs, but that's what happened. I'm glad this happened in a way, I'm gonna make it faster. I've already had this motor go once cause of rod bearing, which is more common than the crank bearing. The best prices for Honda parts are servicehonda.com they're 20% off OEM prices. The oil system and cooling system are fine. We were just wadding it too hard.

It's getting:

New OEM cases
New OEM crank with possibly OEM rod or a falicon knife rod
New OEM cylinder
New baldwin 14:1 2 ring piston
New OEM gaskets
New Kibblewhite oversized valves, and port job with DSAR (for those of you familiar with DRG racing.... DRG, LLC.)

Other miscellaneous stuff, as money permits. ARP's for the truck are going to have to wait for a while now.


Also jetting was damn near perfect on this motor, I'll post a pic of the head to prove it later. Valves and plug were nice chocolate brown, if not a little rich.


As much as I love the diesel trucks, my real passion is atv's. This is not my first and wont be my last explosion in this motor. Half the fun is tearing it down and rebuilding it. Once I find some cases, I'll be good to go.





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post #8 of 37 Old 02-28-2008, 04:45 PM Thread Starter
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Quote:
Originally Posted by 440exkid View Post
The '05's are notorious for seized crank bearings. But If you piston is getting that hot then you either had no oil in it or had somethin wrong with the radiator or cooling system making it over heat.


Both are working fine, jetting is on too, it was too much throttle, not enough warm up time, and holding it WOT for wayyy too long. This motor also has a full season of MX on it.





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post #9 of 37 Old 02-28-2008, 04:52 PM
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Two words for ya Bigboar Kit.


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post #10 of 37 Old 02-28-2008, 04:52 PM
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we will have to racce when u get it done

Matt

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mac intake
ZooDad Mod
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Cat delete with cool duals
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water/meth
headstuds

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