Engine Trouble Loss of power???

F

filipp

Guest
So I bought a Chinese 80/66cc engine off of Ebay, and it ran fine, I got it up to 40 mph. After break-in, I changed the carb out from the stock one to the hp one, and also added a boost bottle. When I started riding, It wouldn't go above 20 mph and the acceleration was super slow compared to what it was before. When I was putting the fuel line in and turned the fuel on, it would only barely flow from the valve, and only when I moved it around. Before I upgraded to the new carb, I once accidentally rode around forgetting to turn on the fuel. All the fuel was used and the line was empty. Now, however, when I tried to see what would happen if I ride with the fuel off, It would remain inside the fuel line, and after a minute of riding the engine would accelerate like it used to, with power, for ~5 seconds and then die, as if there was no fuel, even though there was still fuel in the line. I've tried removing the boost bottle, riding without air filter for a minute, tighten all the nuts and bolts, nothing seems to help. Could anyone offer some advice??
 


crassius

Well-Known Member
Joined
Jul 23, 2012
Messages
4,575
get rid of boost bottle and hp carb - go back to when it ran better than most at 40mph
 

inspectorcritic

Well-Known Member
Joined
Dec 13, 2015
Messages
1,146
Take it over O'Reillys automotive ask to use there compression test kit if it don't read 115 PSI then your as f*** as I am cuz I just bought a motor from California Bikes ran hot for 3 days then went to bog out sh*t and the f***er wont back his engines its this or its that but oh no not my engine, bullsh*t compression 50% of what it should be.

But if your compressions good try your carb clean air filter the fill with oil block air flow also might be your spark plug I change plugs and got a drastic differrrence Z4C.
 

crassius

Well-Known Member
Joined
Jul 23, 2012
Messages
4,575
I know I can do that, but is there any way to fix it how it is?
yes, if nothing else is wrong, but it may be beyond your skill level - first thing to do is go back to how it was when good to see if it is still good
 

Street Ryderz

Well-Known Member
Joined
Oct 14, 2016
Messages
3,126
Take it over O'Reillys automotive ask to use there compression test kit if it don't read 115 PSI then your as f**k as I am cuz I just bought a motor from California Bikes ran hot for 3 days then went to bog out sh*t and the f***er wont back his engines its this or its that but oh no not my engine, bullsh*t compression 50% of what it should be.

But if your compressions good try your carb clean air filter the fill with oil block air flow also might be your spark plug I change plugs and got a drastic differrrence Z4C.
Once again You ran the sh*t out of an engine with no effort to setting it up right and you expect the vender to replace it LOL good luck with that!
 
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