Post by: MX_Peter on May 27, 2012, 10:20:33 PM
I'm just pissed right now and don't know where else to look. Thanks in advance
Post by: scotty dog on May 28, 2012, 02:45:53 AM
Shouldnt really be any noise from ya mains, is the ssshhhhhhh very quiet? or is it very noticeable?
If youve got it apart, might aswell replace mains anyway and if you can afford to do the big end, if the piston looks good and the tolerance is acceptable it should be good to go.
Hope i helped
Post by: cnrcpla on May 28, 2012, 03:20:46 AM
Post by: TotalNZ on May 28, 2012, 05:55:08 AM
If so the crank may not have been balanced properly when it was pressed back together.
I'd take the 40hours running time with a grain of salt too, thats not much for an 07 and without an hour meter there's no real way of keeping track.
Post by: scotty dog on May 28, 2012, 06:15:33 AM
When you say you changed piston rod, do you mean you replaced the conrod and bigend bearing?Good point, wouldnt the vibration be there straight away though? Maybe it was done rough, but it shouldnt get out of balance after its been run should it.
If so the crank may not have been balanced properly when it was pressed back together.
I'd take the 40hours running time with a grain of salt too, thats not much for an 07 and without an hour meter there's no real way of keeping track.
Post by: TotalNZ on May 28, 2012, 06:18:59 AM
Na you wouldn't think so. And yeah you'd think it would vibrate from the getgo.When you say you changed piston rod, do you mean you replaced the conrod and bigend bearing?Good point, wouldnt the vibration be there straight away though? Maybe it was done rough, but it shouldnt get out of balance after its been run should it.
If so the crank may not have been balanced properly when it was pressed back together.
I'd take the 40hours running time with a grain of salt too, thats not much for an 07 and without an hour meter there's no real way of keeping track.
I was thinking of some sort of alignment issue between the 2 crank journals puttin hell strain on the mains causing the noise the burnt look and really accelerated wear.
Post by: scotty dog on May 28, 2012, 06:24:55 AM
Yeah, which would cause vibration after 10 hrsNa you wouldn't think so. And yeah you'd think it would vibrate from the getgo.When you say you changed piston rod, do you mean you replaced the conrod and bigend bearing?Good point, wouldnt the vibration be there straight away though? Maybe it was done rough, but it shouldnt get out of balance after its been run should it.
If so the crank may not have been balanced properly when it was pressed back together.
I'd take the 40hours running time with a grain of salt too, thats not much for an 07 and without an hour meter there's no real way of keeping track.
I was thinking of some sort of alignment issue between the 2 crank journals puttin hell strain on the mains causing the noise the burnt look and really accelerated wear.
Post by: TotalNZ on May 28, 2012, 06:35:01 AM
Shit we're good.Yeah, which would cause vibration after 10 hrsNa you wouldn't think so. And yeah you'd think it would vibrate from the getgo.When you say you changed piston rod, do you mean you replaced the conrod and bigend bearing?Good point, wouldnt the vibration be there straight away though? Maybe it was done rough, but it shouldnt get out of balance after its been run should it.
If so the crank may not have been balanced properly when it was pressed back together.
I'd take the 40hours running time with a grain of salt too, thats not much for an 07 and without an hour meter there's no real way of keeping track.
I was thinking of some sort of alignment issue between the 2 crank journals puttin hell strain on the mains causing the noise the burnt look and really accelerated wear.
Post by: MX_Peter on May 28, 2012, 12:45:27 PM
And forgot to add that crankshaft weight had some little rust spots?
Post by: SachsGS on May 28, 2012, 03:20:58 PM
Post by: MX_Peter on May 28, 2012, 07:35:40 PM
Are you sure it just wasn't loose motor mounts?I'm shore because I checked them all...this is how the bearing and crankshaft looks like
Post by: cnrcpla on May 28, 2012, 10:01:02 PM
Post by: Recovered on May 28, 2012, 10:13:24 PM
Post by: MX_Peter on May 28, 2012, 10:33:09 PM
What is all the rust from? Did you spray some oil when you did the top end instead of exposing those parts to air? If you didn't than that is where the rust came from, and the bearings could be rusty. Maybe that isn't causing the vibration, but it isn't good having rust in there.I had pre oiled conrod, and this rust was before I changed the piston. The previous owner hasn't ride the bike for some time before he sold it. The bike before me has newer been opened from new, so I'm the first one to do it.
Post by: scotty dog on May 29, 2012, 01:34:11 AM
Post by: TMKIWI on May 29, 2012, 08:46:47 AM
That doesn't look nice.
Post by: MX_Peter on May 29, 2012, 09:48:23 AM
http://i.ebayimg.com/16/!CCn0Y!gCGk~$(KGrHqZ,!h!E0fCu!(DeBNLw(VKWYQ~~_12.JPG
Post by: scotty dog on May 29, 2012, 09:58:46 AM
Post by: oldermxr on May 29, 2012, 09:10:15 PM
Post by: SachsGS on May 29, 2012, 11:59:01 PM
Post by: scotty dog on May 30, 2012, 02:33:43 AM
It might be wise to determine how the moisture got in there in the first place.I'd examine the head.This is a good idea too, did you notice the rust when you did the top end before?? It could have happened from the previuos owner though when it was stored, maybe in a high humidity environment without the filter or something like that maybe
Post by: bearorso on May 30, 2012, 01:46:06 PM
With the rust spots on the crank wheels, and the visible section of the bearing outer, it pretty much is certain rust was / is on the bearing surfaces, and / or the big end pin, big end ID.
An engine sitting around, can rust internally, as seen there. The area it's in, even just medium humidity levels, will allow rust to generate. Many / most synthetic oils are hygroscopic - attracting water, and even Castor oil will slough off surfaces. Bare metal, just loves to rust.
It's certainly a Bummer for you.
Make sure you get a recent stock Wiseco Crank, if you go that way, They had many problems with their Chinese sourced (I think) cranks, a while back. Predominantly 4t ones, but I did hear of a few 2t crank problems.
Post by: MX_Peter on March 04, 2013, 10:41:34 PM
