PDA

View Full Version : another 04/05 crank gone bad.


Honda4life05
08-18-2009, 10:07 PM
well i was riding when my motor suddenly seized. i took her home an drained the oil and there were metal shavings everywhere. took out the spark plug and it was about a hald inch shorter than it's supposed to be. the plug made a hole in the piston. gonna tear it all down tomorow and see what all is wrong. looks like i won't be riding for awhile
8TRX450R
08-18-2009, 10:26 PM
aww i hope it wont happen to me i have a 05
Honda4life05
08-19-2009, 10:39 AM
i would reccomend that the next time your doing a top end build to go ahead an replace the crank too. this suckss
08-19-2009, 10:47 AM
same thing just happend to my brothers 05. we just rebuilt it yesterday. new crank, bearigs, seals, gaskits and a 14.1 piston:devil:
Honda4life05
08-19-2009, 02:33 PM
did it do any damage to the cases or anything?
08-19-2009, 02:48 PM
cases were in tip top shape. when we took it apart we washed eatch case and each peice in a parts washer. so we got all the metal out of it. should run good now. guess we will find out this weekend. :macho
Honda4life05
08-19-2009, 02:52 PM
i hope i get lucky like you. i've seen some pretty bad pictures of cranks destroying cases
08-19-2009, 03:02 PM
ah it shouldent be to bad. we were expecting worse than we got. the cases were fine. i hope all goes well for you.

austin
SHIFTx450
08-19-2009, 04:05 PM
how is that 14:1 piston? I was told from Mr. Curtis Sparks himself, to use a 14.25:1.. I have an 06 ER, hotcam stg, 2, alot of carb work and green wire cut. Will it rip or what? What can I expect out of that 14.25:1 ?
08-19-2009, 04:14 PM
it is a 14.25.1 i belive not 100% sure as its not mine. and we dont know yet. we are going riding this weekend to break it in and what not. should run great. it has ported head. piston, and a hotcam. and a sparks pipe and esr intake. it ran really good before the crank went when it had a 12.1 in it. but were hard core dudes so we stepped up our game.lol:p
SHIFTx450
08-20-2009, 12:33 PM
tru. let me know how she runs!
08-20-2009, 12:37 PM
will do.!
Honda4life05
08-20-2009, 03:55 PM
can you guys give me some info on taking the motor out? which side does it come out easiest? drain coolant? and is there any other things that i will need to know? thanx
400exrider139
08-20-2009, 06:31 PM
yeah i would definatly drain the coolant and all the other fluids and when i took my motor out i took it out on the clutch cover side and just tilted it side ways and pulled it out!
4fiddytrx
08-21-2009, 11:27 AM
do you have to take the head and cylinder out or does the whole motor come out. my crank went out too right after i rebuilt my top end on my 05.
08-21-2009, 11:42 AM
take the whole motor our. sit it on a table or working area and go to town. yes the top end has to be removed. including the cyliner
Honda4life05
08-21-2009, 03:44 PM
i took it out, tore it apart, and found out my bottom end was fine. my valves somehow hit the piston (even though i just had them adjusted) and the end of the valve ended up in my muffler. so now i need to clean the WHOLE motor of shavings, and replace, sylnder sleeve, piston, head, and valves. sound about right?
08-21-2009, 09:08 PM
i would get a service manual, just to be on the safe side. we burrowed ours from a freind. i would take it all apart and set each piece out in order. we replaced the piston ,crank and the seals. only reason we replaced the piston is to get a 14.1. the top end was fine. the cylinder also looked fine.
SHIFTx450
08-22-2009, 07:25 PM
get a shop manual and read it if you've never done it before
XCRACER26
08-27-2009, 12:27 PM
I got lucky on my last rebuild, when i pulled the crank the left bearing fell apart, lol close call. Its the bearings that go bad right not the crank it self? It seems to be fine now though.
SHIFTx450
08-27-2009, 02:04 PM
either or. i've seen the crank bearings seize, as well as the connecting rod bearings
spencer_shinn
08-28-2009, 04:27 PM
SAME thing happened to my 05 about a week ago!:mad:
KEVIN132
08-28-2009, 05:14 PM
all ican say is read the manual over and over and learn your bike !! its priceless info in there . and save for all the special tools!!! it pays off believe me!!
Jersey450R
08-31-2009, 06:38 AM
my crank went too on my 05'. i cant afford to fix it right now so i guess in the spring i'll take a look at it. sux.
BlackTrx440ex
09-01-2009, 03:47 PM
my crank went too and took everything out except the tranney and head 1900 in parts and now its running
KEVIN132
09-01-2009, 06:57 PM
guys crank is EASY!!!! tranny is easy with the tools tooooo....

buy the owners manual and give it a shot!!:)

or hit BCS up in my sig and jay will hook u up with a sik deal!!!!!
tell him BEAN sent you!!!
arTuReX
09-02-2009, 04:39 AM
I got an 04 with everything stock, i keep hearing about cranks going bad, i got nightmares about it, well i read that the bearing defect was not in all the 04 05 Trx's, how can i be sure if i need to change the bearing or not?, if i have to change it how much it would cost?, can i do it myself?, thanks in advance!:D
Ruf Racing
09-02-2009, 04:55 AM
Originally posted by arTuReX
I got an 04 with everything stock, i keep hearing about cranks going bad, i got nightmares about it, well i read that the bearing defect was not in all the 04 05 Trx's, how can i be sure if i need to change the bearing or not?, if i have to change it how much it would cost?, can i do it myself?, thanks in advance!:D

Relax, just ride. If it goes hopefully it doesn't do too much damage. If you have the $, tear it apart and rebuild. Otherwise
enjoy. :D
RIDEREDson
09-02-2009, 11:40 AM
Originally posted by arTuReX
I got an 04 with everything stock, i keep hearing about cranks going bad, i got nightmares about it, well i read that the bearing defect was not in all the 04 05 Trx's, how can i be sure if i need to change the bearing or not?, if i have to change it how much it would cost?, can i do it myself?, thanks in advance!:D


One sign is, you'll start seeing metal shavings in your oil.