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Author Topic: 400ex help  (Read 3139 times)
Dustin_89
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« on: January 21, 2007, 11:44:17 PM »

I bought a 2000 honda 400ex yesterday. I was draning the oil lastnight and i put it all back together. i Went riding on the back of my friends atv. woke up this morning and forgot to put oil back in it. i was riding it. and it lost aloooot of power. It was really hot then i herd all my rods and things started  knocking. I went back to the truck after i realized what had happened and put oil in it. Then i ran it for a while idiling. and seemed to be doing all good again but im getting this loud ticking noise.  I dont kno what to do.  Should i buy the 417 kit and just get the whole top end rebuilt? run it till it dont run nomore? i really dont kno. Help please
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TRX450R_Racer
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« Reply #1 on: January 22, 2007, 10:45:59 AM »

I would rebuild the whole motor, top and bottom. What wasn't destroyed by the excessive heat is probably very weak. If you don't replace everything I would be worried about the parts that weren't replaced coming a part. That would totly waste the money that was just spent and ruin all the work that was just done.
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Ryan561
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« Reply #2 on: January 22, 2007, 12:00:58 PM »

MY 2005 EX and my bros 2003 both tick loudly but i guess thats normal
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2005 trx 400ex       Pro Armor bumper
yoshi RS-3             Pro Armor killswich
jetted                   DG nerfs
K&N filter

2006 KX 250F
Its got everything
xr100racer
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« Reply #3 on: January 22, 2007, 01:59:20 PM »

MY 2005 EX and my bros 2003 both tick loudly but i guess thats normal

Thats got nothing to do with this problem, your bikes probably need a valve adjustment.

I bought a 2000 honda 400ex yesterday. I was draning the oil lastnight and i put it all back together. i Went riding on the back of my friends atv. woke up this morning and forgot to put oil back in it. i was riding it. and it lost aloooot of power. It was really hot then i herd all my rods and things started  knocking. I went back to the truck after i realized what had happened and put oil in it. Then i ran it for a while idiling. and seemed to be doing all good again but im getting this loud ticking noise.  I dont kno what to do.  Should i buy the 417 kit and just get the whole top end rebuilt? run it till it dont run nomore? i really dont kno. Help please

Yeah, that sucks. Whole thing needs to be rebuilt. I would just try to find a used engine on ebay and drop it in. Lot less hassle.

KX250 is running good btw, new spark plug and it cranks up 1st kick with no starter fluid
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