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The Scooter Parts Registry

US certificate holder — partial coverage

Which Yx Motors (Usa) models have a Chinese-built engine?

26 of the 28 certificate filings on record for Yx Motors (Usa) Inc name a China-built engine. This page covers only those, and says nothing about the rest of the range.

Model years
2010–2018
Engine factories
2
Engine families
18
Coverage
26 of 28 filings

What the Yx Motors (Usa) filings say about the engines

Yx Motors (Usa)'s filings mix carburettors and fuel injection: 23 rows carburetted, 3 injected. The first injected family appears in 2013; in 2018 the split was 2 carburetted to 0 injected. Check which you have before buying anything on the fuel side.

The engine codes on Yx Motors (Usa)'s test vehicles —4 distinct across the filings — are led by 188MR, 154FMI, 1P39FMA and 196MS. The code is stamped on the crankcase and is a better search term than the badge.

23 of the 26 filings are 50-state (California-legal); the other 3 were 49-state only.

Rated power across the range runs from 2 kW to 27 kW (about 3 to 36 hp).

The vehicle builders named are Chongqing Yinxiang Motorcycle(Group) Co., Ltd and ZheJiang TaiZhou JiaoJiang ZhiWei Motocycle Manufacture Co.,Ltd. — the chassis and the engine do not always share a source.

Each figure is read straight off the EPA certificate rows; the per-family pages below carry the full breakdown for every engine family.

The factory changed. Here is when.

Engine manufacturer by model year, from the certification record
Model yearEngine factory on the certificate
2018Chongqing Yinxiang Motorcycle(Group) Co., Ltd
2017Chongqing Yinxiang Motorcycle(Group) Co., Ltd
2016Chongqing Yinxiang Motorcycle(Group) Co., Ltd
2015Chongqing Yinxiang Motorcycle(Group) Co., Ltd · ZheJiang TaiZhou JiaoJiang ZhiWei Motocycle Manufacture Co.,Ltd.
2014Chongqing Yinxiang Motorcycle(Group) Co., Ltd · ZheJiang TaiZhou JiaoJiang ZhiWei Motocycle Manufacture Co.,Ltd.
2013Chongqing Yinxiang Motorcycle(Group) Co., Ltd · ZheJiang TaiZhou JiaoJiang ZhiWei Motocycle Manufacture Co.,Ltd.
2012Chongqing Yinxiang Motorcycle(Group) Co., Ltd
2011Chongqing Yinxiang Motorcycle(Group) Co., Ltd
2010Chongqing Yinxiang Motorcycle(Group) Co., Ltd

Other American badges on the same engines

These machines came out of the same factory at the same engine size. If Yx Motors (Usa) Inc parts are hard to find, these are where to look next — after measuring.

Model names certified under Yx Motors (Usa) Inc

22 distinct model designations appear on this brand's China-engine certificates. Yours should be among them — importers sometimes market a machine under a different name than the one they certified.

BMS Bi-Metro XLT 110 · BMS Cougar XLT 125 · BMS Eagle 150 · BMS King Cobra 150 · BMS Phantom 150 · BMS Ranch Pony 500 · BMS Ranch pony 600 EFI · BMS Stallion 600 RX-EFI · BMS Stealth 150 · BMS Stellion 600 RX-EFI · Ranch Pony 500 · YX150KD-1 · YX150KD-2 · YX150KD-3 · YX150KD-4 · YX500UTV · Yinxiang YX110CF · Yinxiang YX120CF · Yinxiang YX127CF · Yinxiang YX48Q · Yinxiang YX50-C7 · ZW650UTV

Related in the registry

Source. US EPA annual certification data — EPA Certified Highway Motorcycle Test Results, MY2006-present; EPA Certified Off-Road Motorcycle / ATV / UTV / Rec Vehicle, MY2006-present. Retrieved 2026-09-07. Based on the 26 China-engine rows among 28 certificate rows filed by YX Motors (USA) Inc. Non-China filings are out of scope. Full provenance and method.