Honda 49cc 4 stroke maximum speed

[stude13]

gears-sprockets-chains OH MY try a gebe kit, kevlar belt, plastic drive ring. im 250 and get 28-30mph and 200mpg with a honda 35. rideon stude13

 

[sparky]

wise decision...

 

[mholder]

new 2 this

i have ebay kit i put it on genessis onyx bike w 29" wheels, i weigh about 250 and get about 29mph on my bike is that good for 49cc 4 stroke

 

[sparky]

Sounds about right to me.

Only missing variable is the drivetrain, which I'm assuming is chain-driven. Soo... what's your gear reduction like?

Gear reduction is the number one way to affect acceleration and top speed... by a very, very wide margin.

 

[Ricky 2316]

What's faster a 2 or 4 stroke?

 

[5-7HEAVEN]

What's faster a 2 or 4 stroke?

4 stroke.

4 is bigger than 2.

 

[Carlos motors]

4 stroke.

4 is bigger than 2.

?

 

[Steve Best]

4 stroke.

4 is bigger than 2.

Sheesh. I think 5-7HEAVEN it trying to be funny.

2 strokes fire twice as often as 4 strokes, so all other things being equal (rpm, size, state of tune), they usually make more power.

Things are rarely equal.
A 50cc 4 stroke (especially Honda) is good starting, reliable and torquey but is not known for great power and speed.
Honda rates their 50cc utility motor as making 2.1 HP:
http://engines.honda.com/models/model-detail/gxh50

The Honda 50cc Cub motorcycle engine could make as much as 4.5 HP, but it is a completely different )OHV design running at high rpm (9500).
https://en.wikipedia.org/wiki/Honda_Super_Cub

To make more HP with a 4 stroke is a complicated and expensive task. It generally starts with a camshaft purchase and due to rpm limitations (from basic crank and connecting rod design) it is very hard to get more than a 50% increase in power.

HP = speed (all other things being equal) if you have the right gearing and conditions to use it.
A stock 48cc Chinese 2 stroke puts out about 1.95 HP according various sales sources. Roughly the same as the Honda 50.
I'd say this is is accurate. If anything, the 48cc Chinese 2 strokes are de-rated to fit with many countries max HP laws.
Fitting a tuned exhaust pipe and different cylinder head will usually see a 50% increase in power. A 150% increase in power (3-4HP) is easily and cheaply attainable with porting and pipe work. I was able to get this much HP with only porting, head work (on the stock head) and a $20 stock (but non-catalytic) muffler.

2 strokes are not for everybody. While a 2 stroke is typically smaller, lighter and cheaper to purchase, they typically require care with the fuel/oil mix, are smokey and often drip oil, and require mechanical and tuning ability to properly jet them for best performance without having them self-destruct. 4 strokes burn clean and are not as dependent on tuning ability for good performance as delivered.

Long answer to a simple question. I hope it puts things into better perspective.

 

[5-7HEAVEN]

Steve explained it very well

 

[CrazyDan]

Jeez how do these guests always revive ancient threads lol?