UPDATE PISTON BLOWN HELP..... * PICS INCLUDED *

[Strapstah]

Ok, as many of u know i had a recent problem with my bike( Aprilia mx 50 03' Supermoto).... I finally managed to take the bore out and the pics are shocking....

Piston

https://i15.tinypic.com/3z1bh3s.jpg

Head

https://i7.tinypic.com/3zauath.jpg

Now, i need your help geezers, is there a chance there are no bits of metal in the engine?. Because it looks like it all got squashed at the top looking at the pic.


Also i have one problem i cant take my exhuast off, theres one fukin bolt that takes allen key but the allen key it takes i put it inside tried twisting it to the left and the allen key broke!. Its an impossible bolt. someone help me think of a way i could take the bolt off, so i can take the barrel off to see if i need a new barrel and piston... heres the pics of the exhaust bolt..

https://i8.tinypic.com/4bz10mc.jpg

-

https://i14.tinypic.com/47i4pit.jpg

Please help thanks, strap-on.
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[Welshd1k]

the allan key bold it saff all jusy sits ont he rubber if you loosen it all of it will just pull away

and id lik to see what your bore is like
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Current >Cb600fx hornet, ns125rk90 21.7bhp@wheel<
Sold >,zxr400 h2 (33bhp kit) rd350 n1 rd350 lc2<

[Strapstah]

wait could u explain better please. i didnt understand what you said.... im sorry but i dont understand

"the allan key bold it saff all jusy sits ont he rubber"

wdf? lol, nah seriously what did u say im just waiting for a answer so i can do it now!!!.

Also u see my spark plug... do you lot think its the correct colour?. I wanna know why this happened.
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[rpg]

it looks as if you have been running very weak which has caused a hole in the top of the piston. Did you upjet the carb when you put on the polini? Either that or an air leak making the engine run excessively lean.

[rpg]

it looks as if you have been running very weak which has caused a hole in the top of the piston. Did you upjet the carb when you put on the polini? Either that or an air leak making the engine run excessively lean.

[Welshd1k]

the rubber thing is just a rubber mount it just pulls away(well on my '04 it did) if not id say mole grips or drill it out
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Current >Cb600fx hornet, ns125rk90 21.7bhp@wheel<
Sold >,zxr400 h2 (33bhp kit) rd350 n1 rd350 lc2<

[Resurrection]

If you have a socket abit bigger bash it on with a hammer then ratchet it off!

Res
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ZX9r

[Welshd1k]

and the tubber block is bolted to the frame not the whole thing it splits in two take all the other connectors of the can then twist it around and it will pull of
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Current >Cb600fx hornet, ns125rk90 21.7bhp@wheel<
Sold >,zxr400 h2 (33bhp kit) rd350 n1 rd350 lc2<

[Strapstah]

im sorry i dont understand how i could twist the exhaust while the end is stuck in the barrel..., i cant twist nothing because its still in the barrel, i need to take the bolt off!
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[Welshd1k]

springs off yes ?
end can of yes?
well grab hold of it and yank it forwards to get it out of the barrel then it will pull away (mine does) the allen key doent turn
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Current >Cb600fx hornet, ns125rk90 21.7bhp@wheel<
Sold >,zxr400 h2 (33bhp kit) rd350 n1 rd350 lc2<

[Strapstah]

so how do i put it back?.
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[Blau Zedong]

Holed piston due to ignition timing (unlikely but worth checking if it's adjustable) or lean mixture (i.e. not jetted for the big bore kit).
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[Welshd1k]

[Strapstah]

Ok, heres the latest, i managed to take exhaust of. Ty

Heres pics of the top where the head barrel was. You can see little bits of metal.

https://i13.tinypic.com/2i74vg6.jpg

heres the inside of the barrel.

https://i13.tinypic.com/2h338xv.jpg
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https://i18.tinypic.com/4ca9wfq.jpg

Ok, now what should i do... aka, what do you guys think i need, this is what i think i need:

A new bore kit

Engine cleanup for little metal bits.


Please someone tell me what i need please?. Also if i only need a piston because the barrel wall looks ok to me.

Thank you very much.
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[Jazoli]

Unlucky, that looks a mess, did that a few times to my RD125LC many years ago! That had a 190cc kit and kept blowing up.

You're going to have to split the crankcases and get all the bits of melted piston out, if you stick a new piston in without doing this then run the motor it will go bang again very shortly, barrel looks ok but hard to tell by the pics, you may get away with just a new piston.


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Bike:Speed Triple

[Finglonga]

Strapstah, Keep all the receipts and photos as Asda now say their fuel was contaminated with silicone, you may get compensation if the station where you got the fuel is contaminated.

[Welshd1k]

ohh that looks nasty bore is ok

id split the bottom end and have all new bearings while its open and a new pistona nd rings and youve got a brand new engine looks a tad nasty mate
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Current >Cb600fx hornet, ns125rk90 21.7bhp@wheel<
Sold >,zxr400 h2 (33bhp kit) rd350 n1 rd350 lc2<

[Strapstah]

does that coolant colour look nice?.... is it ment to be dark greenish.

Also, i dont have a recipt of the petrol but im 100% sure im on there cctv on my bike... so what should it do now? who do i go to???.
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[Finglonga]

[Matt2301]

Hey Strap,

I don't know if you still frequent this forum, but I have a Minarelli AM6 engine, as used in the Aprilia RX50.

I'd be pretty willing to bet that it's compatible with the MX50, and it might be more economical to buy it then to pay a mechanic to strip down your existing engine.

If you still need an engine and are interested, PM me:)

[Matt2301]

Hey Strap,

I don't know if you still frequent this forum, but I have a Minarelli AM6 engine, as used in the Aprilia RX50.

I'd be pretty willing to bet that it's compatible with the MX50, and it might be more economical to buy it then to pay a mechanic to strip down your existing engine.

If you still need an engine and are interested, PM me:)