Hey guys. First of all, I've searched relentlessly and have not found a solution to my problem so far regarding my 80cc BGF engine.
I am in the break-in period with about 100 miles. I run a 16:1 ratio. I've always notice oil spewing out of where the spark plug fits and dripping out of the exhaust from time to time. Nothing went too wrong until yesterday.
I was full throttle down a hill and all was well. About 2 minutes later, my engine started to struggle and wouldn't respond to the throttle; it just bogged like crazy.
It progressively got worse within a mile's period; it would bog at low speeds and high speeds; I couldn't even go 20mph. When I would try to, it would bog and backfire (would make a loud boom).
I checked the exhaust to see if it was clogged, nope! It was fine. I also swapped carburetors to see if it would run better but there was no change; the carb has nothing to do with this issue.
I have a high performance carb. Did it let too much fuel into the engine? Is my engine flooded? I pulled the plug and head to see what everything looks like and it doesn't look very good (by the way, I have an NGK B6HS plug (.020 gap) and swapped it out after the other one was dirty... now this one is dirty).
See pics...
Spark plug:
http://img822.imageshack.us/img822/9199/dsc08554v.jpg
Head from above:
http://img84.imageshack.us/img84/1179/dsc08552j.jpg
Head from below:
http://img822.imageshack.us/img822/7747/dsc08560b.jpg
Inside engine (doesn't look good):
http://img854.imageshack.us/img854/7624/dsc08551.jpg
Excess oil:
http://img853.imageshack.us/img853/9799/dsc08559t.jpg
Once I put everything together, I fired up the bike and this time there was a loud popping noise almost as if the exhaust is off. I checked the exhaust gasket and it was fine; all of my gaskets are fine. The bike still bogs and doesn't go anywhere. Here is a video to get a better understanding:
http://imageshack.us/clip/my-videos/11/diu.mp4/
I am lost. What should I do? Any help would be MUCH appreciated... thanks!!!
I am in the break-in period with about 100 miles. I run a 16:1 ratio. I've always notice oil spewing out of where the spark plug fits and dripping out of the exhaust from time to time. Nothing went too wrong until yesterday.
I was full throttle down a hill and all was well. About 2 minutes later, my engine started to struggle and wouldn't respond to the throttle; it just bogged like crazy.
It progressively got worse within a mile's period; it would bog at low speeds and high speeds; I couldn't even go 20mph. When I would try to, it would bog and backfire (would make a loud boom).
I checked the exhaust to see if it was clogged, nope! It was fine. I also swapped carburetors to see if it would run better but there was no change; the carb has nothing to do with this issue.
I have a high performance carb. Did it let too much fuel into the engine? Is my engine flooded? I pulled the plug and head to see what everything looks like and it doesn't look very good (by the way, I have an NGK B6HS plug (.020 gap) and swapped it out after the other one was dirty... now this one is dirty).
See pics...
Spark plug:
http://img822.imageshack.us/img822/9199/dsc08554v.jpg
Head from above:
http://img84.imageshack.us/img84/1179/dsc08552j.jpg
Head from below:
http://img822.imageshack.us/img822/7747/dsc08560b.jpg
Inside engine (doesn't look good):
http://img854.imageshack.us/img854/7624/dsc08551.jpg
Excess oil:
http://img853.imageshack.us/img853/9799/dsc08559t.jpg
Once I put everything together, I fired up the bike and this time there was a loud popping noise almost as if the exhaust is off. I checked the exhaust gasket and it was fine; all of my gaskets are fine. The bike still bogs and doesn't go anywhere. Here is a video to get a better understanding:
http://imageshack.us/clip/my-videos/11/diu.mp4/
I am lost. What should I do? Any help would be MUCH appreciated... thanks!!!
Last edited: