Pleaaaase help

[speedjunkie20...]

Basically I was out with my other mates on peds riding around, had been riding for about 2 hours then all of a sudden, Bang and mine dies. I try starting it and it spits flames out of the exhaust and just wont start?

I have a gilera storm with a leo vince zx exhaust and a pm tuning xtech 70cc kit. The recovery guy said it looks like my exhaust valve has gone which could be quite costly?

Any help please

[Ichy]

oh dear.

Recovery guy doesn't seem to understand the difference between 2 and 4 stroke.

Without wasting time, check for fuel and spark then rip the cylinder off and have a very good look at the piston and rings.
____________________
https://www.metacafe.com/watch/1972097/how_to_behave_on_a_forum/

[speedjunkie20...]

Put about a table spoon amount of petrol directly into the cylinder through the spark plug hole and tried to start after putting the plug back in, and nothing. Spark plug however looks absolutley fine. My mate behind me said something had hit him just as it happened aswell, which also didnt sound too good. And one of the nuts on the cylinder head sheered off.

[The Artist]

[Ichy]

[speedjunkie20...]

This is just when I looked at it I went to take it off and realised, Fuel is fine, However doesnt sound like its sparking, not sure why this would make it flame out of the exhaust though?

[MarJay]

[Bikeless]

I wonder if you changed your jetting after doing these mods?

[ms51ves3]

[djr]

[Ichy]

Bike would require compression to suck fuel through so its unlikely to come out of exhaust.

Just take the head off, should take all of ten minutes.
____________________
https://www.metacafe.com/watch/1972097/how_to_behave_on_a_forum/

[mr.kris]

ok it sounds like you have blown it up no big deal you will need a piston and rebore from your local bike enginears and by the way the piston cant get out the exhust pipe lol not even a pice of it it is verry very unlikely
____________________
TS50X---CM125---MZ150---Z250---RS125---ZXR250---BANDIT600---TRX850---TL1000S---CBF600---ZX6R---BANDIT1200S---CG125---VFR800---CBR1000F---CG125---CG125---CB900F---CB900F---CG125---TUONO1000R---KLR600---GSX1300R HAYABUSA---VFR400NC30---BANDIT1200---CG125

HAYABUSA now in use!

[KevTM]

lol i don't think he meant the whole piston came out the exhaust.

[djr]

[chillpill]

as soon as i saw "xtech" i knew exactly what the problem would be , scored to feck barrel

those kits a re wank stay away from them , get a polini sport or a mhr rep with a 22mm carb for a decent and still reliable setup

[MarJay]

[ms51ves3]

[MarJay]

[speedjunkie20...]

Still had no luck finding the problem, a garage is picking the ped up tomorow to take a look they think its something to do with the ignition timing being out as it happened as i went over a speed bump, im thinking also go back to standard air box instead of the polini sponge thing, and put a 50cc cylinder back in and changing to a gianelli exhaust with a decent variator and speed control kit and decent clutch, What do you think to that?

[chillpill]

if your putting the standard cylinder on you might aswell put it al back to standard then , the best performance increase you will get will be from a 70cc kit , variators and clutches are a waste on a stock barrel.

dont waste money on a garage , have you even take the cylinder head of yet to see what the barrel looks like ?

[speedjunkie20...]

Yeah the cylinder is fine, a fair amount of carbon build up on top of the piston and the head gasket has a nice tear through it but the cylinder itself is fine

[speedjunkie20...]

Well it was checked out, and ive been told I blew my top end, I new the head gasket had gone but what else does blowing my top end comprise off, Also what could have caused this so I can prevent it happening in the future?

Alex.

[chillpill]

it could be anything from a blown piston ring to a fucked barrel , its a technical term garages like to use just before they lube up your rectum and stick a huge bill up there

id recommend fitiing a new cylinder kit anyway , xtec ones are wank . buy a new 70kit ir just put it back to a standard 50 if you cant afford one

[speedjunkie20...]

as far as im aware its head gasket and base gasket, is there any cylinder kits that I can fit and run with the exhaust etc I have and have no problems with?

[chillpill]

polini sport or a mhr rep if you want more power , a 22mm carb and carbon reeds would suit it nicely for a reliable set up