Loss in power along with oil/fuel “popping” out of air intake: Blown head gasket??

[Ocean7]

Hi guys, I'm kinda new to motorized bicycles. I installed an 80 cc kit on my MB which went smooth.

The bike has been running well for around 8 weeks, and ride it everyday! It is awesome! I have been taking it slow for engine break in purposes and have been following the instructions that came with the kit regarding engine break in, and all was going well until today. I took it out for a spin and after about 20 min it lost power and started spitting fuel/oil mix out the air intake on the carb with loud "popping". It seemed as if the engine was back firing out the carb or something?

I'm curious if this has ever happened to anyone and what exactly the problem might be?

Any advice much appreciated

 

[Ocean7]

Re: Loss in power along with oil/fuel “popping” out of air intake: Blown head gasket?

My Name is Allan by the way, I came across this site while trying to find solution to my bike breakdown. its a really cool site, I'm surprised I did not come across it sooner

 

[reg454]

Re: Loss in power along with oil/fuel “popping” out of air intake: Blown head gasket?

Hmmm sounds like a ring problem, if it is popping and spitting out gas then you are getting blow through from the rings pushing the fuel mix back up to the carb.\\

Other will be around to put their expert advice too so hang on for a bit.

 

[Goat Herder]

Re: Loss in power along with oil/fuel “popping” out of air intake: Blown head gasket?

Lots of fuel coming out of the carb filter. sounds like the float bowl is sticking or needs adjusting. Look in our classic post section. There you will find lots of facts.

 

[Goat Herder]

Re: Loss in power along with oil/fuel “popping” out of air intake: Blown head gasket?

Heres the post you need for carb repair. http://motorbicycling.com/f4/carburetor-pictures-how-install-rebuild-195.html Welcome to the forum glad to have you here!

 

[Ocean7]

Re: Loss in power along with oil/fuel “popping” out of air intake: Blown head gasket?

Awesome I'll give that a try, thanx for your advice