So Ive had my bike for about a month now and have found it is an ongoing project. Im learning alot and have figured out alot of my problems on my own with a little help from all of the nice people on this forum. Thanks all. Any how my current problem is that I am not getting full power and its like the bike choses when it wants to run full bore. So to describe it. I will start the bike and warm it up for a minute or so. Then I will ride it light and warm it up a little more for the first few blocks of my ride. When I hammer on it sometimes it opens wide and some times it makes a lower tone sound out of the exhaust and will only go about 15mph. When it opens up randomly I can reach about 30-33. I want the throtle to be more responsive. I have played with the idle screw and have it right where it sounds healthy. the gas is 30:1 which is what the bike directions call for. I am stumped as to why it only opens up when it wants to. any suggestions? The bike is fairly new and broken in too. Thats all the info I can think of right now. Any suggestions would be much appreciated thanks
More power?
- Thread starter tankaray
- Start date
I dont know why but it seems it takes a good 15 mins at least for mine to start really ripping, i dont know why because it doesnt take that long to warm up, but thats just what it does.
30:1? that may be part of the reason.
Your choke staying closed? For some reason lately my choke is going opening (well, technically it would be closing) so i had to tape the choke arm to prevent that. the air must be going by fast enough it sucks it shut,
30:1? that may be part of the reason.
Your choke staying closed? For some reason lately my choke is going opening (well, technically it would be closing) so i had to tape the choke arm to prevent that. the air must be going by fast enough it sucks it shut,
MotorBicycleRacing
Well-Known Member
Take your air cleaner off and tighten the nut on the choke pivot
Maybe use a little loctite
This is a common problem
Absolutely nothing to do with his problem
I recommend 32 : 1 on a broken in motor ( 4 oz oil to a gallon)
My Grubee 2 strokes run strong and hard cold right out of the box
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darwin
Well-Known Member
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I have a 4 stroker so no experience with an HT but with 2 stroke lawn equipment I use those lil packages of 2 stroke oil that mixes exactly with 2 gal of gas and my gas can holds just 2 gal so theres no room for guessing just mix n pour. Thats my way to avoid saying OOPS.
Mountainman
Active Member
rich enough ??
usually the mix with one gallon of gas ??
don't think those are rich enough for the Happy Times ??
auto stores have the marked containers so as to get proper mix
got one there the other day -- a big suringe THING
didn't care for the design that much -- kind of makes a mess -- but it works accurate
the one befor that was a plastic cup type with measuring marks
bought from a motor cycle shop -- the simple and the best
MM
usually the mix with one gallon of gas ??
don't think those are rich enough for the Happy Times ??
auto stores have the marked containers so as to get proper mix
got one there the other day -- a big suringe THING
didn't care for the design that much -- kind of makes a mess -- but it works accurate
the one befor that was a plastic cup type with measuring marks
bought from a motor cycle shop -- the simple and the best
MM
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MotorBicycleRacing
Well-Known Member
Those lil packages of 2 stroke oil are for 40:1 and 50:1 2 stroke
engines not Chinese 66 cc 2 strokes which should not run that low of a ratio
Maybe you should stay out of this thread and go back to smilie abuse in the chatbox?
There is enough confusion about this as it is without you adding to it
30:1 is fine.
The stock generic low cost HT engine is pretty gutless. Without matching the ports to the manifolds, without an expansion chamber, without jetting the carb (amazingly the main jet will need to be a bit smaller ie leaner), without sealing the intake side, without increasing the compression ratio, without a proper plug and wire they just won't pull hard.
Search the board for the above topics. They have been covered many times. None of the items are really that tough, just a little bit time consuming (FUN IMHO!) and a few bucks.
The stock generic low cost HT engine is pretty gutless. Without matching the ports to the manifolds, without an expansion chamber, without jetting the carb (amazingly the main jet will need to be a bit smaller ie leaner), without sealing the intake side, without increasing the compression ratio, without a proper plug and wire they just won't pull hard.
Search the board for the above topics. They have been covered many times. None of the items are really that tough, just a little bit time consuming (FUN IMHO!) and a few bucks.
emdude
Member
The fact that it spins up well as you run out of gas is to me a clear indication that the engine is running way too rich. Mine was super rich right out of the box and I had to do quite some work to get leaned out sufficiently.
A properly tuned two stroke should do just that...two stroke.... and NOT four stroke. This is what is occurring as you describe it. I have mine tuned now to where it NEVER four strokes and spins up to top speed quite nicely.
See previous post by me for reasonable details on my findings.
A properly tuned two stroke should do just that...two stroke.... and NOT four stroke. This is what is occurring as you describe it. I have mine tuned now to where it NEVER four strokes and spins up to top speed quite nicely.
See previous post by me for reasonable details on my findings.
Shadeslay
Member
For mixing I use a baby bottle, has all the measurements and they are cheap.
