49cc Huasheng 4 stroke build issues



The_Aleman

Well-Known Member
Joined
May 2, 2007
Messages
785
That plastic piece in the airbox is to prevent the engine from sucking the air filter in. Don't cut it out, drill a hole in it (and the airboxer cover) if you must. Best thing to do is to replace your intake so you can run a "2-stroke carb", sounds like your carb isn't dialed in and the adjustment is behind a block-off plate on most newer Huasheng carbs. I've found those carbs to be unreliable over the long term.

shave the head if you can do that (only like .30, .50 if your felling lucky)
Dude. The Huasheng doesn't have a removable head, and if you're gonna tell someone to "shave the head" don't just throw crazy inspecific numbers out there like that. SMH.
 

Mr.FrankSmith

Member
Joined
Feb 24, 2019
Messages
36
That plastic piece in the airbox is to prevent the engine from sucking the air filter in. Don't cut it out, drill a hole in it (and the airboxer cover) if you must. Best thing to do is to replace your intake so you can run a "2-stroke carb", sounds like your carb isn't dialed in and the adjustment is behind a block-off plate on most newer Huasheng carbs. I've found those carbs to be unreliable over the long term.



Dude. The Huasheng doesn't have a removable head, and if you're gonna tell someone to "shave the head" don't just throw crazy inspecific numbers out there like that. SMH.
Oops, I already cut it... I'm fairly confident that the filter is stiff enough for now that if I need to I can get another one before this one gets eaten. What's your take on the vent hose? Leave it blocked, or unblocked?
 

The_Aleman

Well-Known Member
Joined
May 2, 2007
Messages
785
You can always stick a piece of aluminum screen or the like on there for extra protection.
The stock airbox is restrictive itself, I drilled holes in mine's cover before I ended up replacing it.

As for the hose on airbox, cap it, and stick a small filter on the hose leading out of the engine.
I found a small Uni filter on Amazon for mine. Bam, crankcase vent. PCV? No, ACV :LOL:

86237
 

mark20

Active Member
Joined
Sep 26, 2018
Messages
392
Dude. The Huasheng doesn't have a removable head, and if you're gonna tell someone to "shave the head" don't just throw crazy inspecific numbers out there like that. SMH.
Oops, my bad 🤭
I was thinking about another 4 stroke.
(Long day yesterday)
But those numbers are in safe operation as these engines dont make super high compression, and IF you could, it would run fine (hell even better, the faster you go the funner it is!)
Also I said "if you can do it"
I wasent sure if you could (I'm not complete experienced with this engines, so please OP, take my advice with caution)
 
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docjmph

Guest
You can always stick a piece of aluminum screen or the like on there for extra protection.
The stock airbox is restrictive itself, I drilled holes in mine's cover before I ended up replacing it.

As for the hose on airbox, cap it, and stick a small filter on the hose leading out of the engine.
I found a small Uni filter on Amazon for mine. Bam, crankcase vent. PCV? No, ACV :LOL:

View attachment 86237
what jet size are you using on that carb
 
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