YZ250F '14 shift assy issues

rob2014250f
Profile picture for user rob2014250f
Posts
6
Joined
1/21/2015
Location
Grants Pass, OR US
rob2014250f 1/21/2015 11:29am
1/21/2015 11:29am
Tell me what you guys think these are from the bearings on the shift fork stopper we're all in tach still but the little metal piece that covers the bearings were in the bottom of the crank case
mxrose3
Profile picture for user mxrose3
Posts
2337
Joined
8/17/2006
Location
Delmar, DE US
mxrose3 1/21/2015 1:18pm
1/21/2015 1:18pm
rob2014250f wrote:
Tell me what you guys think these are from the bearings on the shift fork stopper we're all in tach still but the little metal piece...
Tell me what you guys think these are from the bearings on the shift fork stopper we're all in tach still but the little metal piece that covers the bearings were in the bottom of the crank case
Looks to me like they didn't clean out the bottom of the cases good enough before they put it back together.
There are a lot of oil tracts that are hidden, including the oil pump and screen filter, ect. There are even oil tracts going up thru the cylinder and the head. If they didn't take everything apart, rinse it, and blow out everything with compressed air, then there would probably still be some leftover metal bits in there.
rob2014250f
Profile picture for user rob2014250f
Posts
6
Joined
1/21/2015
Location
Grants Pass, OR US
rob2014250f 1/21/2015 5:31pm
1/21/2015 5:31pm
sorry i ment to say these are not the bearings from the shift for assembly and this was before i took the bike to my yamaha dealer they said they clean everything out in the tank and only found a few metal shaving in the bottom of the crank case the clean it all out and reassembled it and it still seized so i am getting frustrated beacuse if they clean it all out and put it back together for the second time and it still seizes im going to not trust there mechanic should i take it to someone else or try and shoot for a brand new motor ?

The Shop

See All »
hassbeen 1/21/2015 10:25pm
1/21/2015 10:25pm
rob2014250f wrote:
my 2014 yz250f seized on me it had about 60 hours on it and it ended up being the shift fork stopper well the are covering...
my 2014 yz250f seized on me it had about 60 hours on it and it ended up being the shift fork stopper well the are covering everything free of charge well the replaced the part and split the cases and said he tore everything apart and put a new piston in the engine and put it back together and cranked it over and it was still seized so now there taring it all apart again and putting a new rod in it to see if that is the problem im getting frusturated and how long its taking but least its free of charge here is a picture of what i found in the case cover ill up load in my next post
Im not so sure they build the motor correctly, Wont seize on assembly, unless timing etc is wrong and the valves are catching the piston. Did Yamaha do the rebuild? This should be checked way before attempting to start the motor.
hassbeen 1/21/2015 10:26pm
1/21/2015 10:26pm
BTW mine is totally rebuild and done 4 hours so far so good.
tomm55x
Profile picture for user tomm55x
Posts
786
Joined
9/14/2014
Location
Erie, PA US
tomm55x 1/22/2015 3:49am
1/22/2015 3:49am
Tm sells a magnetic drain plug, I will be ordering one soon, it will catch any shavings in the oil that the filter or microscreen won't grab.
rob2014250f
Profile picture for user rob2014250f
Posts
6
Joined
1/21/2015
Location
Grants Pass, OR US
rob2014250f 1/22/2015 5:16pm
1/22/2015 5:16pm
ya he said the top end was off when he turned it over by hand it it still was seized and yamaha dealer in cottage grove Oregon is doing all the repairs he said the top end was all in spec and looks great. so as of now he is putting a new piston and rod in there but the picture of the pieces i found does not look like and pieces from the rod and piston . it looks more like gearing to me or splines off of a shaft or something idk i just want my damn bike back already i only had it for 5 month then this happend
YamaLink
Profile picture for user YamaLink
Posts
336
Joined
5/25/2010
Location
Bum Bum, ID US
YamaLink 1/24/2015 9:31pm
1/24/2015 9:31pm
Lenny at Cottage Grove is a good guy!
rob2014250f
Profile picture for user rob2014250f
Posts
6
Joined
1/21/2015
Location
Grants Pass, OR US
rob2014250f 1/24/2015 11:16pm
1/24/2015 11:16pm
Ya he is . Chad has been doing the work on my bike and they are helping me out very well and are very nice people I just never have taking my bike to a shop and it's my first brand new bike so I feel kinda protective about what's going on with it ya know
JDrider
Profile picture for user JDrider
Posts
2
Joined
6/19/2016
Location
Milton, FL US
JDrider 6/20/2016 5:31pm
6/20/2016 5:31pm
For those who say this is not a problem on the 14' 450, think again. Here is what I found in my motor at 30 hours. My magnetic drain plug saved my engine and pulled all the pieces to the bottom of the motor. Most of them came out on the plug itself and I fished the rest out with a magnetic wand with the side of the cases off.
I realize this is an old post but it is one I found when searching for the problem so I figured I would share my experience. I hope anyone with a 14' yz250f or yz450f is smart enough to change this part out.



Pit Row

See All »

Post a reply to: YZ250F '14 shift assy issues