Ran out of gas and won't fire now

[Durby]

My daughter was riding, well trying to ride, her new quad in the backyard last night and it ran out of gas. I have been unable to make it re-fire since that moment. I did hear it detonate a few times and instantly starting yelling to get her to turn it off. I have a really good spark but it seems like the engine is flooding now. I have not pulled the intake and checked the reeds but I kinda think the bike may have blown up the reed cage. I even tried to drag it around the yard tonight hooked to my raptor to see if it would fire and nothing. Anyone have any ideas?

I will pull the intake and exhaust tomorrow after work I am guessing I need to leak test it again as well. I can't imagine that a few detonations (Backfires) would destroy a new piston (I sure as heck hope not).

 

[dirtysquared]

That totally sucks! You did alot of work to that bike for her.

I'd pull the carb and look in on reeds.

I'm not expert, but That backfire could be a sheared off woodruff key allowing the flywheel to throw the timing off.

Man I feel for ya, You put alot of time in that for your Girl. Hope this helps.

Fred

 

[Awk08]

backfires and detonation are 2 different things.
detonation sounds like a little man in there pinging on the pipe with a little hammer.

backfires are usually one of 2 things, sheared flywheel key allowing the flywheel to turn out of time, firing at the wrong time.
or a broken reed petal.

either of those are better, cheaper problems than actual detonation, which will bore a hole thru the piston.

check them reeds, then the flywheel key.



edit: dirty's quick like a ninja tonite

 

[dirtysquared]

edit: dirty's quick like a ninja tonite

No I'm just Hiding from My wife and Kid. They both are sick!

 

[Durby]

well I never heard a PING, more of a POP. I am hoping the reeds blew apart or something, I actually have a spare reed cage. I will know more tomorrow.

 

[Awk08]

well I never a PING, more of a POP. I am hoping the reeds blew apart or something, I actually have a spare reed cage. I will know more tomorrow.

you really have to listen closely for the ping of detonation, and kinda know what your listening for.
usually, if it's leak free, and running stock compression, it's not a problem.

pretty sure you'll find reeds or woodruff key is your problem.

 

[harley1-5]

I had a yz85 sheer the woodruff key and it fired just not on time would backfire if kicked enough

 

[Blaaster]

Might just have to trim up an old credit card for some makeshift reeds.

 

[Durby]

Might just have to trim up an old credit card for some makeshift reeds.

^^Maybe a casino club card will work better, no imprinted numbers so I can get a better seal ^^

LOL, I will use real reeds thank you....

 

[Durby]

finally got some time today to go out and figure the problem out. I took the rear plastics and air filter off and saw this. Pretty obvious what my problem was. I had a spare set of reeds lating around in the parts box so I was able to get it fixed pretty easy. Fires right up again now.

 

[harley1-5]

wow that's cool that you got it fixed

 

[Durby]

I am just glad it was easy fix. I actually think it's starts easier now than it did. I wonder if the reeds were damaged from the start.....

 

[harley1-5]

did you put stock back in it?

 

[dirtysquared]

That's great that's all it was.

They might have been boggered up if it was hard starting before, and not now.

 

[Herpderplol]

Might have now sealed completely if it was hard starting

 

[Durby]

My spare cage actually had what looks to be a set of Super Stock reeds like these

Boyesen Super Stock Replacement Reeds Yamaha YFS 200 Blaster SSF035 | eBay

 

[Awk08]

My spare cage actually had what looks to be a set of Super Stock reeds like these

Boyesen Super Stock Replacement Reeds Yamaha YFS 200 Blaster SSF035 | eBay

nice !

was the factory reed stops on that cage ?
they promote long life of the petals, and should always be used.
it has never been proven leaving the reed stops off helps anything at all, but will definately allow the petals to flex too much, and eventually crack/break.
i think thats the reason boysen and others give you the little flat plate, and recommend leaving the factory stops off....to sale you new petals every year X(