New user ZS125GY-10 help please

[krzysztofqsza]

Hello @LL on forum.

I bought two years old ZS125GY-10.
The last owner before me lost papers and instructions.
Does anyone of you have instructions?
How to change the coolant?
What is the chain and sprockets should there be?
Does anyone know what is the best ratio for this model
for the best speed and acceleration?

In my bike is no oil filter?! Try to change motor oil, Valvoline 4T semi syn 10w40 well be OK?


Please help, because on the internet there is not much about this model.

I read the other entries, Y like photos, I'll do a few and upload later :)

[Weldangrind]

Welcome! Once we see the pics, it will be easier for us to offer some guidance.

[krzysztofqsza]

Welcome! Once we see the pics, it will be easier for us to offer some guidance.

my bike
http://dl.dropbox.com/u/79785311/125/IMAG0204.jpg

left side engine
http://dl.dropbox.com/u/79785311/125/IMAG0273.jpg

what is it?!
http://dl.dropbox.com/u/79785311/125/IMAG0271.jpg

More pictures will do tomorrow.

[FastDoc]

Bolt is the oil filter. It's just a screen you clean. You can also drain the oil from there.

The wires appear to be the neutral switch and/or gear position indicator if your bike is so equipped.

Welcome to the forum.

[krzysztofqsza]

Bolt is the oil filter. It's just a screen you clean. You can also drain the oil from there.

Ups, i dont clean it when chang oil. Next time :?

thanks, one less mystery.

[FastDoc]

It's not too important. You can check it next time. It's just a fine metal screen designed to get bigger particles removed from the oil.

[krzysztofqsza]

It's not too important. You can check it next time. It's just a fine metal screen designed to get bigger particles removed from the oil.

I am calmer.
How often do you change the oil?
And what oil does it work?
Poured 10W40 DuraBlend / semisyn Valvoline 4T because I did not know what to pour.

[FastDoc]

Every 1,000 miles is a good guideline.

Any 10-40 will be fine.

[krzysztofqsza]

Every 1,000 miles is a good guideline.

Any 10-40 will be fine.

every 1000 miles? =~1610km? so often?

[FastDoc]

Cheap insurance.

Depends on how you ride, only a guideline.

You could probably go as much as 3,000 but for only a few dollars, why risk it?

[SpudRider]

Welcome; we are glad you joined us. :)

I fixed your post so the photographs would display. Please reduce your photographs to 40 percent of their current size; re-sizing your photos will make this thread much easier to read. ;)

You choice of motor oil is fine. I recommend you change the engine oil every 2,000 kilometers. You won't forget to change the engine oil if you change it every time the odometer turns over an even, or odd, number of thousands of kilometers. ;)

You bike appears to be a smaller version of the ZS150GY-10 owned by forum member Jeremy2011. :)

http://chinariders.net/modules.php?name=Forums&file=viewtopic&t=13126&highlight=zs150gy10

Spud :)

[humanbeing]

From made in China air-cool cousin (push rod /SDH125-46/ street bike)
http://a.imageshack.us/img96/5817/image3y.gif

[krzysztofqsza]

Welcome; we are glad you joined us. :)

I fixed your post so the photographs would display. Please reduce your photographs to 40 percent of their current size; re-sizing your photos will make this thread much easier to read. ;)

You choice of motor oil is fine. I recommend you change the engine oil every 2,000 kilometers. You won't forget to change the engine oil if you change it every time the odometer turns over an even, or odd, number of thousands of kilometers. ;)

You bike appears to be a smaller version of the ZS150GY-10 owned by forum member Jeremy2011. :)

http://chinariders.net/modules.php?name=Forums&file=viewtopic&t=13126&highlight=zs150gy10

Spud :)

Thank you very much SpudRider, improved photos, sorry I do not have a large practice with the forums.

You're right, you'd better change the oil more often, 1l of oil is not a big expense.

thanks for the maintance schedule :)

And what about the gears, the gear ratio? It can be converted somehow, whether you hit or miss trying?

[krzysztofqsza]

More pictures for You.

http://dl.dropbox.com/u/79785311/125/IMAG0296.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0295.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0292.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0291.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0290.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0289.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0288.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0287.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0286.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0285.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0284.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0283.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0282.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0281.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0280.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0279.jpg

http://dl.dropbox.com/u/79785311/125/IMAG0278.jpg

[SpudRider]

Thank you very much SpudRider, improved photos, sorry I do not have a large practice with the forums.

You're right, you'd better change the oil more often, 1l of oil is not a big expense.

thanks for the maintance schedule :)

And what about the gears, the gear ratio? It can be converted somehow, whether you hit or miss trying?
You're welcome. :) Thank you for resizing your photos.

You can experiment with different size sprockets to change the final gear ratios on your motorcycle. If you want higher speed with lower engine rpms, you can either decrease the size of the rear sprocket, or increase the size of the front sprocket. If you want more torque for climbing steep, off road terrain at low speeds, you can either increase the size of the rear sprocket, or decrease the size of the front sprocket. ;)

Spud :)

[Weldangrind]

That looks like a really well made bike. I like the wrench hanging from the license plate! :lol:

Tell us what gearing you have now. Count the number of teeth on the rear sprocket and on the front (countershaft) sprocket. We can guide you from there. What is the maximum speed that you can easily ride at?

[SpudRider]

Thank you for posting the additional photographs of your bike. :) I agree with Weld; you bought a very nice motorcycle. :D The arrows in your first two photos point to an emissions control device which is designed to reduce exhaust emissions. ;) Please tell us where you live.

Spud :)

[krzysztofqsza]

That looks like a really well made bike. I like the wrench hanging from the license plate! :lol:

My son "helped" me at work :P

Tell us what gearing you have now. Count the number of teeth on the rear sprocket and on the front (countershaft) sprocket. We can guide you from there. What is the maximum speed that you can easily ride at?

front sprocket is 17, rear sprocket is 53 if I do not make a mistake in counting :)
on 4gr go from 40km/h to 90km/h
on 5gr fast to 100km/h later slowly accelerates to 115km/h max.

[Weldangrind]

Do you want faster acceleration from a stop, or do you want more top speed?

[krzysztofqsza]

Thank you for posting the additional photographs of your bike. :) I agree with Weld; you bought a very nice motorcycle. :D The arrows in your first two photos point to an emissions control device which is designed to reduce exhaust emissions. ;) Please tell us where you live.

Spud :)

I live in Krakow, Poland
http://goo.gl/maps/AV4yC google maps show Y where it is ;)

Emissions control device, a EGR valve, and again another mystery less :)
exhaust gas recirculation valve, which will be better ridden like
pulled out it, and blinds all the holes in the motor unit.

[krzysztofqsza]

Do you want faster acceleration from a stop, or do you want more top speed?

Twice a month we go on gravel roads.
I would like to prepare the two sets,
one on asphalt roads so top speed, and the other on the ground.
You know what I mean?
I hope someone has the same bike and tell me how to drive a motorcycle on which sprocket, so I did not have to try and buy only those sprocket I need.

[wilserchinarider]

With small engined bikes, you can't really change the gearing that much without either killing top speed, low end power, or even both! Since the front sprocket is easiest to change, I would start there...one tooth larger for more "comfortable" top speed, and/or one tooth smaller for more low speed power. Gearing the bike higher, as in a larger front sprocket, may not bring you more top speed, but may drop the engine revs to make that speed more comfortable, as in the engine isn't screaming at redline. cheers, hope this helps!

How does the bike perform now? Just realize that it is only 125cc and lower gearing won't have you throwing roost like a 400cc dirt bike, and higher gearing won't let you cruise effortlessly at 100kph.

edit...in one of the pics your front sprocket looks quite worn out...might be worth the money to replace both sprockets and chain while you have it apart.

[SpudRider]

I agree with Wiserchinarider. ;) I would get two countershaft sprockets, one larger and one smaller than the current C/S sprocket. I would experiment with these countershaft sprockets to find the gear combinations I preferred. Then I would switch countershaft sprockets, depending on whether I was riding off road, or on pavement. :)

Spud :)

[krzysztofqsza]

Yes you're right, it's just 124ccm, no miracles.
I do not know this bike and just think of the saving of time and a lot of fun with gear-change.
What do you think about pulling the recirculation valve, the engine will work any better?
Do you have something like this in their bikes?

[Weldangrind]

I'm not sure, but I don't think it is an EGR valve. I believe that it is designed to add oxygen to the exhaust stream to work with the catalytic converter (and I think it is called an AIR or Air Injection Reaction valve). The catalytic converter will either be a bulge in the pipe, or it will be part of the muffler.

I removed the muffler (with catalytic converter) from a 50cc scooter, and i forgot to remove the AIR valve. The result was a massive BANG! every time I closed the throttle. :lol: I removed the valve and changed to larger jets and it worked great. It was barely capable of 50km/h before the change, but easily cruised faster than 70km/h after.

Just removing the AIR valve will not likely improve anything, and it will probably cause the catalytic converter to be plugged in time.

[krzysztofqsza]

I'm not sure, but I don't think it is an EGR valve. I believe that it is designed to add oxygen to the exhaust stream to work with the catalytic converter (and I think it is called an AIR or Air Injection Reaction valve). The catalytic converter will either be a bulge in the pipe, or it will be part of the muffler.

You're right, I checked the wires carefully.
One goes from the intake manifold to the valve.
The other comes from the air filter to the valve.
The third goes from the valve to the engine, bolted with two bolts near the exhaust, as seen in the picture.

http://dl.dropbox.com/u/79785311/125/1.jpg

http://dl.dropbox.com/u/79785311/125/5.jpg

http://dl.dropbox.com/u/79785311/125/2.jpg

http://dl.dropbox.com/u/79785311/125/3.jpg

http://dl.dropbox.com/u/79785311/125/4.jpg

The previous owner told me that apparently the catalyst is kicked out,
but there is no such shots "BANG!" as you wrote.
Where there may be a catalyst?
Welded silencer, because the previous owner he liked the noise. :lol:

[Weldangrind]

I can see the catalyst behind the heat shield.

http://dl.dropbox.com/u/79785311/125/1.jpg

[krzysztofqsza]

I can see the catalyst behind the heat shield.

http://dl.dropbox.com/u/79785311/125/1.jpg

OK, then try to dismantle and remove the catalyst,
see whether it will be a big difference in engine working.

[Weldangrind]

It will be very difficult to remove the catalyst. It is like a honeycomb, and it is very tight in the pipe. It will be easier if you can cut it and weld it back together.

That said, one of our members cut his apart and there was no catalyst inside. :roll: It was totally fake. If yours is empty also, then just get rid of the AIR valve.