Wiseco gave up the Ghost *Nasty Pics*


48 replies to this topic
  • almostinvincible119

Posted April 16, 2008 - 06:39 PM

#1

I just installed a new wiseco piston, and the section of the piston that connects to the rod and has the wristpin go thru it broke. It ended up punchin a hole in my cylinder. Getting the parts isn't the problem, but the labor is. I need to split the cases to get all the metal shards out of the bottom end. I figure that its probably going to be around a grand to fix (parts and labor) I'm still in college so I really cant afford to do it all. I was wondering if I could sell it as is, and how much I could expect for it, or if it was a better idea to part it out, and how much I could expect from doing so. All in all, unless I can get it fixed cheap, I'm out of the bike business. By the way, it only had 24 minutes on the top end when it went

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  • thumpyz

Posted April 16, 2008 - 07:25 PM

#2

get on the horn to wiseco, see if they would be willing to help with it.

  • almostinvincible119

Posted April 16, 2008 - 07:30 PM

#3

yeh, i thought about that. i figured they have some sort of disclaimer that states they arent responsible. but hell. its worth a shot

  • Family Man

Posted April 16, 2008 - 07:34 PM

#4

This isnt the first time Ive read about a wiseco failure on here. Maybe Wiseco will recall the parts. I suspect they have faulty wrist pin desighns.

  • akonibai

Posted April 16, 2008 - 07:37 PM

#5

maybe the piston got stuck before it the pin breaks.. could you please tell what did you do before this happened.

  • Vintage Not Pimpage

Posted April 16, 2008 - 07:42 PM

#6

You didnt install the circlip correctly :thumbsup:
you can see how the pin backed out until it contacted the cylinder breaking off the pin boss.

  • DirtbikeLP

Posted April 16, 2008 - 07:45 PM

#7

by the pictures im thinkin that is a crf450r/x(a little confused because in the picture of the valves it looked like there were five). anyway if u plan on doin the labor yourself i dont see how it could add up to 1k. new cylinder is about $230 and new hi comp wiseco is $180. im sure theres probably some stuff that i cant see but im sure whatever it is couldnt fill a deficit of $600.

  • almostinvincible119

Posted April 16, 2008 - 07:46 PM

#8

You didnt install the circlip correctly :thumbsup:
you can see how the pin backed out until it contacted the cylinder breaking off the pin boss.


i actually did install it right, i checked it about 4 times before putting it together. i found half the circlip in the bottom end and picked it up with a mag. the other half was on top on the piston when i pulled the head off

  • almostinvincible119

Posted April 16, 2008 - 08:05 PM

#9

This isnt the first time Ive read about a wiseco failure on here. Maybe Wiseco will recall the parts. I suspect they have faulty wrist pin desighns.


ive been told that the wristpin was breaking, not that it was faulty. but if it was faulty, it sure as hell pushed out the circlips. cause everytime i assemble an engine, i inspect the circlips religiously.

  • almostinvincible119

Posted April 16, 2008 - 08:10 PM

#10

by the pictures im thinkin that is a crf450r/x(a little confused because in the picture of the valves it looked like there were five). anyway if u plan on doin the labor yourself i dont see how it could add up to 1k. new cylinder is about $230 and new hi comp wiseco is $180. im sure theres probably some stuff that i cant see but im sure whatever it is couldnt fill a deficit of $600.


if it were a honda, why would i post it in the yamaha section. its 5 valves chief, its a yami.

im gonna round these numbers off

new valve-100 bucks
new piston-150
new cylinder-250
split the cases(i cant do that)-200 bucks labor

and now your probably asking yourself. why would i split the cases...well...i think i would rather get those metal shards out now rather than later, when my tranny locks up in a whoops section.

and then the labor for installing everything else. i dont feel like doing it. i dont have the know how on installing valves and splittin cases. I'll do the minor things. But when it comes to that bottom end, then forget that.

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  • little_twin

Posted April 16, 2008 - 08:44 PM

#11

Now is the best time to learn what you don't already know. Get your self the tools and have a go at it. You have nothing to loose.

  • YZERIK

Posted April 16, 2008 - 09:57 PM

#12

2 words son. "BREAK IN"

anyhow, set the bike aside, accumulate funds, then get it repaired.... dont sell it, dont part it,etc. . just wait till you have the dough.

  • Slinkyman16

Posted April 16, 2008 - 10:04 PM

#13

2 words son. "BREAK IN"

anyhow, set the bike aside, accumulate funds, then get it repaired.... dont sell it, dont part it,etc. . just wait till you have the dough.



and in the mean time.. gather up some manuals, tools and some time and take a wack at some things that you can possibly due like.. do as much prep work on the motor as you can to minimalize your labor costs or anything else yo u can imagine yourself doing..

owe while your at it. replace your timing chain. since its apart anyway replace it now..

owe and call up the weisco. they may be whilling to help you out with some parts.. this is not the first time ive seen this on this board..

  • grayracer513

Posted April 16, 2008 - 10:21 PM

#14

Actually, this does have the look of a clip falling out. The reason I say that is that only one side of the wrist pin boss is broken. This suggests that the clip fell away, the pin backed out until it was supported only by one side of the boss. At that point, the rocking strain on the boss would have broken it.

Wrist pin clips should be installed with the open end at 12:00 o'clock or at six, with 12 being preferable, to prevent the inertia of the piston changing directions flexing the clip out of place.

  • Birdy426

Posted April 16, 2008 - 11:21 PM

#15

Why don't you think you can split the cases? Don't need a whole lot of space (you could do it on the kitchen table, or even in a dorm room). Don't need much more than hand tools...a steering wheel puller works fine to get the case off of the main bearings and split the cases. An impact gun of clutch hub holder to break the clutch nut loose, and that's pretty much it. The book is pretty good in terms of directions (except that pesky little part about lapping the valves...if they're Ti, don't do it). All in all, it really ain't that tough.

  • William1

Posted April 17, 2008 - 05:10 AM

#16

It may well be a case of the circlip failing as GrayRacer thinks, it could be a casting flaw. Could be a machining flaw. Three possibilities, ywo of which fall upon Wiesco. They may help you as a show of goodwill.

Your desire to do a full tear down is correct. A complete cleaning is in order along with a through inspection of all bearings, esp. the crank/con rod. If you do fix it, replace all the valves, not just the one.

  • almostinvincible119

Posted April 17, 2008 - 07:01 AM

#17

heres the problem. sunday, my mechanic/sponsor got into a wreck and broke his collarbone, 3 ribs and punctured a lung. I think I'm going to take the bike to him, he has all the tools, and let him walk me through it. With me being his hands and him being the brains, I'm sure we can get it done, and maybe I'll learn something in the process. Im just afraid of the tranny fallin apart right when i split the cases apart.

Can that actually happen? lol

also, I've never broke cases before, is there a center gasket or something? I couldnt find it on the microfiche

  • Punisher660

Posted April 17, 2008 - 07:12 AM

#18

Yes there is a center gasket. You will need a full bottom end gasket kit as well as top end gasket kit for this job. (Technically you don't need the whole kit, but its cheaper to buy the whole thing)

When you split the cases, the trans wont just fall apart. You will have a series of gears on the countershaft as well as the main shaft. There will be some small parts in there that you will need to pay attention to. The best thing you can do for yourself is to spend $45 and get a repair manual.

This job isn't too bad, but it is time consuming.

  • almostinvincible119

Posted April 17, 2008 - 07:27 AM

#19

i mean, ive got the manual. it came with the bike. but i guess i things arent just gonna fall all over the place when i split it, it may be ok.

Thanks about the gasket to. I couldnt find the gasket listed on yamaha of troy.

and YZERIK: this happened during break in. the bike was in 1st gear running at about 4k rpms.

  • yz426em

Posted April 17, 2008 - 07:30 AM

#20

I can tell you first hand with weisco pistons and their failures. I had their pistons fail in my snowmobile under perfect jetting. I sent them the pistons and could get no response until started sending e-mails non-stop. Their are a special bread and believe their products are perfect. Long story short they wouldn't do a thing for me and in the long run they didn't even send my pistons back like they said they would. They suck sorry, but i wouldn't reccomend using them in anything.





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