Anyone ever see this happen???

[o1440ex]

440 Big bore has anyone ever seen this happen Wat would cause this?? I plan on rebuilding what does everyone recommend Wiesco or JE??

[TRXRacer1]

Rare but it happens. Just remember even a sliver of that sleeve in a ball bearing can turn into a grenading situation. Be 100% that everything is clean.

JE or Wiseco..... doesn't really matter. I've used both. If you want JE I have one I'd sell brand new in the box.

[PaRedneckRiders]

ya ive seen it before but not to often

Between Wiseco and JE

They r both good Im running wiseco in both my motors because it the time of my rebuild JE was not making pistons, if it was up to me i would take JE over wiseco but that jmo

[o1440ex]

I tore it down to the cases..... Im gona have a buddy thats a Mechanic Split the cases and make sure everything is out... Where is a good place to have a sleeve pressed in and how much is it???

[TRXRacer1]

What bore were you at on that sleeve..... mm? Tons of places can do a sleeve. Where are you? Might be something close.

[o1440ex]

All i know is that its a 440.....I dont got much info on it i got it in a trade...... The kid i got it from said that he thinks it blew up beacuse he didnt run high enough octane.. I live in central Wisconsin. Thanks for your help

[riotact]

Originally posted by o1440ex
All i know is that its a 440.....I dont got much info on it i got it in a trade...... The kid i got it from said that he thinks it blew up beacuse he didnt run high enough octane.. I live in central Wisconsin. Thanks for your help

Yeah,that could do it for sure.It heats up and the sleeve expands and gets pinched by the cases if there is not enough clearance there.

[yellow416ex]

Did the sleeve slide down in the cylinder?

I had a piston seize one time, the sleeve broke away from the thicker portion at the top, slid down and hit the crank. I didn't lose quite as much as yours but definitely make sure you get all that metal out

[TRXRacer1]

Originally posted by o1440ex
All i know is that its a 440.....I dont got much info on it i got it in a trade...... The kid i got it from said that he thinks it blew up beacuse he didnt run high enough octane.. I live in central Wisconsin. Thanks for your help I have AAEN Performance do all my stuff in Racine WI. I know they've been $65 for bore jobs and I just called about a price on installing an over sized sleeve but the head guy is out till tomorrow. They're absolute nuts with sleds and polaris stuff and trust me, they know what they're doing with anything you give them. Quick turn around and they have no problem with people supplying their own parts.

For your next piston maybe consider the JE 88.5mm. It's 5cc less then the 440 kits but it leaves you a little room for future serviceability. That's a very nice thing.

[o1440ex]

What Compression ratio can i safely run pump gas on???? sorry about all the dumb questions but i dont know much about quads just starting to get into the sport just made the switch from sleds to quads.... Thanks for all the help

[PaRedneckRiders]

11:1 440 would run fine on pump gas, u might b able to go 12:1 but then i would run the GTT HD head studs and some people say that they get denotation with a 12:1 on pump has ive ran 12:1 on premium 93 octane pump gas with no probs but now both my motors r 11:1

[togup]

Im wondering if it was a stock sleeve bored to 89mm if that was the case it could have just been to thin and cracked

[TRXRacer1]

You can get detonation at 11:1, never assume anything over 10:1 will be ping free with pump gas. It's all about heat and among other things that also depends on your cam profile, riding style, terrain, cooling and of course compression. I was able to make a 10:1 with stg1 hotcam ping on some really knarly rides.

[o1440ex]

Yes it was a stock cylinder, Its got a Big Gun Full Exhaust, and a Stage 2 cam on it and a k&n air filter.

[TRXRacer1]

Show a pic of the top of the cylinder and I'll tell you if it was stock or not.

[o1440ex]

It says 397 CM3 on the side of the cylinder so im guessin its a stock cylinder http://i25.photobucket.com/albums/c57/IQkid/Photo0521.jpg

[jcs003]

here on my 250r. luckily it didnt break off and destroy my crank:

[TRXRacer1]

Looks like a stock sleeve when I compare to pics of mine but it almost looks like a 426 bore.

[JOHNDOE83]

If your getting a whole new piston and all, might as well buy the 440 kit with the pre sleeved cylinder included.

On ebay all day long under $400.

[o1440ex]

Originally posted by TRXRacer1
Looks like a stock sleeve when I compare to pics of mine but it almost looks like a 426 bore.
How can i tell if its a 440 or 426?

[o1440ex]

I called AAEN Performance about gettin that sleeve installed and the guy wasn't there i the lady there said that she will leave a message for him to call me back and that was on friday im gona try to call again tomorrow.

[sc400ex_rider]

if its a weisco piston the part number is on top. it will end with 8500= 85mm stock or 9800= 89mm 440. a 426 is 88mm i think.

[PaRedneckRiders]

Originally posted by sc400ex_rider
if its a weisco piston the part number is on top. it will end with 8500= 85mm stock or 9800= 89mm 440. a 426 is 88mm i think.
yep most common bores are
85mm= stock bore
86mm= 406
87mm= 416
88mm= 426
89mm= 440

I would measure everything just 2 double check it is a 440

Like stated above if its wiseco the last 4 numbers ID the bore size, The first 2 of the last 4 is the bore size then the nxt to are 00 IE: 8900 would be a 440

[o1440ex]

Heres a pic of the piston i dont think its a wiesco theres a part number on the bottom of the piston but the quad isnt here so all i got is a few pics

[o1440ex]

Im gona be ordering parts wat should i get a JE 10.8:1 or a 11:1 Big bore kit. Then wat else do i need a Complete gasket kit???

[rocky_mtn_honda]

if you need any bottom end parts, let me know...im parting one out...

[o1440ex]

I found out that the piston thats on it is a JE 12:1 440 and the kid said he was running regular gas in it so im guessing why thats why it blew up

[TRXRacer1]

Originally posted by o1440ex
I found out that the piston thats on it is a JE 12:1 440 and the kid said he was running regular gas in it so im guessing why thats why it blew up I'd say no. The fact your sleeve was paper thin was the issue. Just get a big bore sleeve and another piston.

[o1440ex]

what else do i gotta order with for my cases to be split?

[rocky_mtn_honda]

you should order a complete gasket set...it will come with the cases gasket. also, you should probably replace the oil seals while your in there.

[o1440ex]

Still never found a good place to have the cylinder resleeved anyone know any place?

[rocky_mtn_honda]

not i my friend...i usually just use my local machine shop.

[o1440ex]

any idea on how much it will cost?

[TRXRacer1]

You know I've used them for almost 8 yrs now and I ran in to the same problem. It's like nobody knew what was going on all of a sudden. I'll need some cylinder work done in a couple months and I might need a new place.

Sorry for the bum lead man. I'm going to do my crank too so I'll probably send that and the cylinder out to CT Racing if I don't hear anything from AAEN

CT shows $110 for a resleeve.

[o1440ex]

Im gona call max power tomorrow out of Madison Wisconsin. (http://www.maxrpms.net/shop/)

[o1440ex]

Does K&S make good gaskets and seals? Or is there a different company everyone suggests

[TRXRacer1]

Well you need a multi-layered steel head gasket and a big bore kit at that. Do they offer this? Cometic is usually my brand of choice but I've read tusk is giving them a run at a fraction of the cost.

Let us know how the call to max power works out.

[Stroker81]

try eric gorrs forward motion. They do machine work. They are in wisconsin

[o1440ex]

Eric Gorr's forward in motion is also in madison tomorrow im gona call max power and Forward in motion and hopefully have a good answer from one of them.

[jcs003]

sock gaskets are the best(IMO). you will have to buy them individually, but they will perform great. just make sure your builder cuts it to match the new big bore.

[Ian400ex]

Originally posted by o1440ex
Im gona call max power tomorrow out of Madison Wisconsin. (http://www.maxrpms.net/shop/)

Wisconsin, that's too close to Steve for me.