new bike problems 125

[squishio]

hey people
1st of all please please dont fog me of because I have an import.
I just need some good advice and this seems a great place to start.

I have just got a second hand sanya sy125 5months old with 1400 miles on the clock.
I have not had a go on it my self as I have not got my license yet.
but my dad has and he reckons it is lacking power for a 125.

he is used to riding a 650 transalp so it will never compare to that. but when he was a kid he used to ride 50's and 125's and he got them up to 75ish.

so anyway, this sanya has a couple problems

1. when you turn the headlight on the rev counter stops working occasionaly and the fuel indicator goes to full even if the tank is near empty.

2. lacking in power. I thought I would check the air filter to see if that was causing the lack of power but it was clean, but I notices that there was smoke coming out of the air filter box so I checked the pipes and there is a tube going from the air filter into the side of the engine which is blowing exhaust into the air input. I thought this could be a thing to help it start in cold weather? but it seems a bit weired to me.

3. again power, geting up to speed is a bit of a problem it jus takes ages to get up to 30mph.

also from looking at the spark plug it looks like it's running rich.
so what can I do about these problems?

I dont expect top accelaration or top speed but I want more out of it than what it's giving at the moment.
are there any performance upgrades that I can fit to it?

thanks a lot in advance.
rich.

[Philious]

try searching ebay for powerbands

it can add 10hp to ur ped
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Previously; Honda XR125 - Yamaha DT125r - Aprilia Rs125 - Suzuki GS500e, Currently; Kawasaki ZX6R + ZX10R
Theory : Passed 28/7/09 Module 1: Passed 21/09/09 Module 2: Passed 23/09/09

[iooi]

I would guess that your dad is refering to a long time ago, when 125's were not strangled to fit in with the leglistation on power output.

I guess this bike is one of the cheaper copies of the std jap fair and could well just be designed that way.

Give it a good service and treat it to some new plugs. May just help a bit
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Just because my bike was A DIVVY, does not mean i am......

[baldy]

is the choke on all the time?
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One day i will rule the world, just not today.

[squishio]

nope choke isn't on.
I'm tempted to put in for aa full service so that they check EEEEVERYTHING. anyone know how much a full service costs on average in the uk?

[Faraz]

My fuel guage on my chinese 125 used to stop working sometimes. I just punched it and it started working.

Faraz.
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'56 Yamaha MT-01
'05 Nissan 350z Roadster GT
3 words dude.. Fvck. Yes.

[squishio]

I think I'll stick a ngk sparkie in as the cheap chinese copy thats in it probably isn't doing much good.

so anyone know what the exhaust going into the airbox is about?

[Teaman]

the exhaust going into the airbox is part of a restriction thing possibly. It might not be though so don't play.
sometimes its just there with a none return valve type thing to suck warm air into the air box to aid the engine,
Take the plug out and check the colour of it, chocolaty brown and its ok, if not its not running right,
Ive never known an accurate fuel guage on any bike.
for a chinese 125 to be going around 40-60 is perfectly normal, ours don't do any more than that. there just not built to be able to.

the 125's that your day could be talking about at rd's ar's and so on, there still fast as fuggery but tend not to last long piston wise.
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There is no point in ranting about someone stupid because there is nothing u can do about it. There is no cure for stupid.
Someone stupid does not realise they r stupid.stupidity is indistinguishable from malice U just have to accept that some people are thick as p1gsh1t and work around them.

[Finglonga]

The Electrical problem could be a bad earth, so check all wires are secure and corrosion free.

The pipe going into the air-box sounds like the crank case breather. It also sounds like you are getting some blow back past the piston rings. However if the airfilter was clean it can't be too bad as if it was the filter would be coated in oil.

How fast (top speed) does go? For a 4T 125 even restricted(rare) I would expect at least 45-50mph.
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Andy Sez....
F.Y.Y.F.F.

[griggs01]

hi all
i have just bought a sanya sy125-11 and i want to do a service on it does any one know what parts i use ie honda yammaha or is there somewhere i can get parts for this bike like oil filter spark plugs, also i dont suppose there is anywhere you can get a workshop mannuel for it or is that asking too much from a chinnese import. many thanks if you have any answers for me please get in touch.
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griggs01

[tutton]

Too much to ask
chinese manafacturers dont ever in their wildest dreams think their machines may break
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[stirlinggaz]

HI,
if this bike has the same cg clone engine (156fmi),
then its good for up to 75mph.
adjust mixture, they are always set ridiculously rich & change plug.
if its the cvk50 carb, then the mixture screw in underneath, facing towards the ground????
change the main jet for a bigger one, the one in mine wasnt marked, but i put in a 115 & fit a conical air filter. made a huge difference.apart from being really loud (due to absence of air box-later rectified by fitting the conical filter inside the empty shell of air box) made a big difference to pulling away, wasnt so sluggish & definately got a couple of extra mph.
chinese bike forum is a useful place for advice.
dont bother with the race cdi's - no difference.
cheers,
GAZ

[Cigaro]

The problem with the fuel gauge and tacho sounds like a bad earth.