Heard a pop, now it doesn't work

amyvomit · #1 11-22-2009, 02:54 PM

hey guys, again, i've spent hours trying to find the verbage to fix my problem. I was riding my bike and i heard a pop then it just quit working. when i try to get it started the engine sorta runs but i cant give it gas and then i pull in the clutch and it stalls. does anyone know what that pop was and how i can fix it? i took the spark plug out and looked at it and it looks fine.

i have an 80cc raw engine.

thanks much

Pablo · #2 11-22-2009, 05:14 PM

Do you still have full compression?

**Bikeguy Joe** · #3 11-22-2009, 05:57 PM

Check for spark. Look closely at the engine to see if you blew a gasket (brown funk dripping or oozing).

It sounds like your engine is turning, just not firing.

**Norman** · #4 11-22-2009, 09:19 PM

is it a newly built bike if so sounds like the pop you heard might be the head gasket leaking or it blew a hole in the gasket
check the head bolts if they are loose then it might pay to try to re torque them with a torque wrench
or pull off the head and see if you have a hole in the head gasket.

amyvomit · #5 11-22-2009, 11:27 PM

thanks all for the replies.

if i do pull off the head to check the headgasket, i know that i should replace it anyway. what do i use as a headgasket or where do i buy one?

thanks again

a_dam · #6 11-23-2009, 03:09 AM

If your first name is Amy, that's one appealing username!

amyvomit · #7 11-23-2009, 06:33 AM

uh...thanks?

**BarelyAWake** · #8 11-23-2009, 06:57 AM

Quote:

Originally Posted by amyvomit

thanks all for the replies.

if i do pull off the head to check the headgasket, i know that i should replace it anyway. what do i use as a headgasket or where do i buy one?

thanks again

Most kits come with a replacement head gasket, dig around for somethin' that looks like this;

- but if not, give ThatsDax a call, gaskets are cheap enough (like $5 or so)

BTW - you prolly know this, but the "80cc" is around 66cc actually, so you'll hafta take some (easy) measurements, you'll find 'em on the product page here: ENGINE_KIT_PARTS_PAGE_2

Pablo · #9 11-23-2009, 07:19 AM

Quote:

Originally Posted by amyvomit

thanks all for the replies.

if i do pull off the head to check the headgasket, i know that i should replace it anyway. what do i use as a headgasket or where do i buy one?

thanks again

67/"80"cc head gasket Check the stud size first.

**Bikeguy Joe** · #10 11-23-2009, 08:54 AM

Although, just to stir the pot and get back OT, I have never heard a head gasket "pop" when it went bad.

Was this "pop" like a crack sound? Where did you hear it from? Did it just go "pop" then the engine froze, or what happened?
Or, did it go "pop pop pop pop pop " until you stopped?

Have you started checking the easy regular stuff before you pull the head off?
Check for spark.
Check for positive fuel flow.
Can you pedal the bike with the clutch in?

More details please, we'll get you running again.