125cc more power

[phoenixluckyb...]

hi i own a modest china made 125cc. the engine is built exactly as the Honda CG125. is slightly heavier than the CG however due to the bodywork.

i'm thinking of getting more power outta this little baby somehow. what i'm aiming at is something that wont require mechanical modifications in the engine itself. something that goes on and comes off.(is that even possible?)(this is mainly so that i can sell it off stock if i need to someday)

so i was wondering if introducing a small turbocharger might do the trick? if so, how can i achieve that? and what exactly will i need to do?

as you might have realized i don't know much about mechanical modifications and this might even seem funny to most people. but any help i can get is much appreciated!

Cheerio!
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*~Phoenix~*

[P.]

[The Shaggy D.A.]

Depending on how much you want to spend...

https://cgi.ebay.co.uk/New-cg150-cylinder-block-Replacement-cg125-Enhance-/270735304366

or

https://cgi.ebay.co.uk/NEW-CG150cc-Chinese-engine-replacement-156FM1-2-/390300695704

Although you said you don't want to make engine modifications, this won't be any harder than trying to fit a supercharger.
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Chances are quite high you are not in my Monkeysphere, and I don't care about you. Don't take it personally.
Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5

[ThoughtContro...]

It's a Chinese CG copy. They're not the most reliable of bikes as far as reputation goes, due to inferior materials and quality control compared to the major Japanese manufacturers.

If you really want more speed use it to pass your test. You can sit an A2 test on a 125, which will allow you to ride any bike, as long as it's restricted to 33bhp, for a period of 2 years. Often these restrictors mysteriously fall out allowing riders access to the bike's full power, tho this is entirely at their own risk, and the power restriction expires in 2 years anyway. A larger bike is the best route to more power, albeit it'll cost you more in insurance, fuel and road tax than a 125.

You could play about with the sprocket sizes, trading off acceleration for a possible minor increase in top end. Playing about attempting to extract power in other ways will likely result in the engines early demise. Given that it's Chinese that may be alot quicker than you might want, and before you get much chance to enjoy your extra burst of a few mph extra speed.

Your call, but I wouldn't bother.
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Prize cunt
--
"In a world of universal deceit telling the truth is a revolutionary act" - George Orwell

[phoenixluckyb...]

[phoenixluckyb...]

Thanks ThoughtControl and The Shaggy D.A. for your input! much appreciated!
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*~Phoenix~*

[Rogerborg]

If you don't have the money for a bigger bike, I wouldn't waste it trying to wring more out of that engine. It's sturdy and reliable (yes, even in Chinese-made guise) but it's never going to be a rocketship.

If you really do want to spend on it, then consider a 150cc barrel and piston swap.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[bennell09]

the 150 block or getting your current one polished + ported also changing gear ratio and try optimizing your carb jetting on a dyno to get a little extra

[G]

[Kickstart]

Hi

Not sure where you have seen a turbo suitable. There are loads of cheap electrical fans sold by various people on Ebay as turbos, but they will be useless at best (and at worst fail and dump debris into the engine).

Finding a real turbo for such a small engine will be difficult (well, just about impossible), and even if you do find one fitting it and setting it up will be a lot of work. New exhaust and intake for a start.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[dangerousdave]

For an the easiest power increase change the exhaust, and air filter for sportier versions.

Filter: Get a K&N for it. You may need to modify it slightly to fit the CG airbox.

Exhaust: Not sure if sports exhausts were made for this bike - but one may fit from CB125 etc. Failing that, modify the standard exhaust for more airflow (drill out the end). If you know a welder then cut the silencer off and have a sports muffler welded on.

If you want much more power then there is no substitute for a bigger engine. I hear the Honda XL185 engine fits.
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1988 Kawasaki KMX 200

Previous: Yamaha YZF1000, ZZR600, KMX200, DT50, KX80, CG125, PF50

[Teflon-Mike]

[kramdra]

since your in pakistan, you can probably do what ever you want to it. If I had that opportunity over here, it would be an engine swap, 250cc or so.

also a used engine would be far cheaper!

Except on my cg125 that would be suicidal becuase the brakes are so bad.

[Teflon-Mike]

[Kickstart]

[Teflon-Mike]

[Kickstart]

Hi

Bragging rights for having to push it home after the RAC decided you had already called them out too many times?

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[heehaw]

[dangerousdave]

be interested to hear how you get on with the turbo . . .
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1988 Kawasaki KMX 200

Previous: Yamaha YZF1000, ZZR600, KMX200, DT50, KX80, CG125, PF50

[phoenixluckyb...]

wow! thankyou all for your suggestions!

now check this out! the bike i have is a china copy of the HONDA deluxe 125 model(picture attached) available here in pak... the diffrnc is front disc brakes in the deluxe against drum in mine...

now a lucky friend of mine had an uncle who moved away n gave him his 125 deluxe... n this friend claims that the deluxe has some kinda in-built turbo mechanisms that takes the ENGINE air outlet(exhaust) and sends it back to the air filter to be compressed by some fan... i rode the deluxe and it runs super sweet!

now i asked this friend if i could open up the air filters n carbs on the deluxe to check out how it works... and mebe somehow implement that in my bike. he agreed... I hope we can do it soon! and if it can be ported to my bike... well that would solve this issue... and i can move on to thinking up something else to do with ma ride

wish me luck people!
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*~Phoenix~*

[Tristan.]

You'll find thats there for emissions purposes, it draws clean air in with the exhaust gasses. No power gain.

[N cee thirty]

[Kickstart]

Hi

As above. If an exhaust gas recirculation system then probably there to lower combustion temperatures and reduce NOx emissions.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing