Engine differences

[DeaselWing]

Hello Folks;
I have a 200CC ZHEJIANG X-MOTOS and I need valves. There appears to be several different types for sale on E-Bay and AliExpress, all with little differences in their specifications, my engine is a ZS169 FMM, where is the best place to get the right valves for it. I have already purchased a set on AliExpress but they are not quite right.
Please advise

Mike Coleman
Ontario, Canada

[franque]

Send us a picture of the motor, I've got one that's marked ZS169FML, and it's actually a 163FML. Early on there were some, shall we say, "discrepancies" with how they were marked. Also, yours says, based on the FMM part, that it's a Chinese "250", which is marketing speak for 223-229cc. It could also be that it's a Yamaha clone, but we'd need to see pictures.

[grumpyunk]

Wouldn't the 169 indicate a 68mm bore, thus making it larger than the 229cc 167's? If so, it is not a 200cc, but closer to a 250?
A ZS167FMM is a Zongshen CG250 engine, essentially. EDITED the model
Displacement is 229cc with a 67mm bore.
x-moto lists valves...


https://www.motor-x.com/zawory-glowicy,c.html

Though it is a long way from Tipperary when you consider shipping.

If you read this post, you may want to measure bore & stroke before ordering anything from anywhere. Seems they will(did) mark them as having a larger bore than was actually the case.

https://www.chinariders.net/showthread.php?t=17552

tom

[DeaselWing]

Gents,
It is a 65.5 MM bore, I measured it and calculated the displacement at 230CC if my memory serves me. Franque, I agree on your discrepancies comment. I have been involved with engines, mechanics, motorcycles and engineering for over 60 years and I have never seen anything like this. The bike will be for my grandchildren to ride, so far I have stripped it to the bare frame for cleanup and repaint, changed all the bearings and now it is going back together.

Thanks
Mike
Ontario, Canada

[franque]

Try looking for 165FMM valves. You might be able to get valves for a Hawk or a TBR7 that would work, but out of curiosity, what is the stud spacing on the head?

[DeaselWing]

Franque,
Here is a picture of a head I found on AliExpress, if I cannot find the proper valves I will replace the entire head assembly. I have verified the dimensions shown, this head will fit my bike.
Regards;
Mike

[franque]

Perfect, I'm glad you found what you needed!

[DeaselWing]

Franque, thank you, stay warm. Winter here, -18C. UGH !

Mike
Ontario, Canada

[grumpyunk]

This listing(I searched for Lifan 200cc valves) may list some that would fit:

https://www.ebay.com/itm/Intake-Exhaust-Valves-Stem-Seals-For-Lifan-YX-125cc-140cc-Engine-Pit-Dirt-Bike/174066946981?hash=item288732d3a5:g:pUwAAOSwd0tdpup l

Down near the bottom, similar sponsored items show dimensions.
tom

[DeaselWing]

Hello Grumpy, thank you, I need a 31.5MM intake, 89.5mm long and a 27MM exhaust, 89.5MM long. 5.5MM stems.
Thanks Again
Mike

[grumpyunk]

Order these, then cut the valve tulip diameter to the narrower dimension you need. Just need a lathe and some machine cutting bits... length is close enough on one you can grind/machine it a bit shorter.

description:
PIT Bike Intake Valve Exhaust Valves fit for Zongshen Loncin Lifan CG250 ATV Go Kart, Moped & Scooter GT-175



https://www.aliexpress.com/item/32807728070.html?spm=a2g0o.detail.1000014.13.f0ac3 633TI0uC4&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.33416.213326.0&scm_id=1007.33416.213326.0&scm-url=1007.33416.213326.0&pvid=fb914d9d-6d07-41ed-a9ce-6080f4f26508&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.33416.213326.0,pvid:fb914d9d-6d07-41ed-a9ce-6080f4f26508,tpp_buckets:668%230%23131923%2352_668 %23888%233325%2317_23416%230%23213326%2313_23416%2 34721%2321967%23401_23416%234722%2321972%2310_668% 232846%238109%231935_668%232717%237560%23294_668%2 31000022185%231000066059%230_668%233422%2315392%23 419_4452%230%23211409%230_4452%233474%2316498%2360 2_4452%234862%2324463%23695_4452%233098%239599%237 18_4452%235108%2323442%23958_4452%233564%2316062%2 387

[grumpyunk]

A nother set of valves ... maybe closer:

https://www.aliexpress.com/item/32836289192.html?spm=a2g0o.detail.1000014.11.456c7 521ZqL4PS&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.33416.213326.0&scm_id=1007.33416.213326.0&scm-url=1007.33416.213326.0&pvid=fa87f070-90cf-447a-8536-ba4802033fc9&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.33416.213326.0,pvid:fa87f070-90cf-447a-8536-ba4802033fc9,tpp_buckets:668%230%23131923%2381_668 %23888%233325%2317_23416%230%23213326%2313_23416%2 34721%2321967%23401_23416%234722%2321972%2310_668% 232846%238109%231935_668%232717%237560%23294_668%2 31000022185%231000066059%230_668%233422%2315392%23 630_4452%230%23211409%230_4452%233474%2316498%2360 2_4452%234862%2324463%23695_4452%233098%239599%237 18_4452%235108%2323442%23958_4452%233564%2316062%2 387

Grind the valve stem tip as needed to shorten. You can use a bench grinder if needed.
tom