Engine family RTTNC.150MC2

What this record says

Sold in the US by

Titan Imports Inc.

Engine built by

Zhejiang Xinba Technology Co.,Ltd.

Vehicle category

Highway Motorcycle - Ib (50-169cc)

Certificate numbers

RTTNC.150MC2-002

What the number itself says

Reading RTTNC.150MC2 left to right: R is the model-year letter for 2024, TTN is the three-character code the EPA assigned to Titan Imports as certificate holder, C marks a highway (street-legal) certification, .150 is the displacement in litres, so 150cc and MC2 is Titan Imports' own sequence for that year. Nothing in the number names the factory — that comes from the certificate itself.

The engine, as described on the certificate

The test vehicle Titan Imports submitted for this family (model GN150T-15) carried engine code 1P57QMJ-2. In the Chinese engine-model convention that reads as one cylinder, horizontal (flat) cylinder, with a nominal 57 mm bore, QMJ series. Against the certified 150cc that implies a stroke of roughly 59 mm — a sanity check for a piston or cylinder listing, not a published figure.

The certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by carburettor. There is a catalytic converter in the exhaust, recorded as "TWC, single bed, open loop". The head carries a pulse secondary-air (PAIR) valve.

Rated power on the record is 6.2 kW (about 8 hp) at 7,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle

1P57QMJ-2

Nominal bore (from the code)

57 mm · implied stroke ≈ 59 mm

Cylinders / valves

1 · 2 per cylinder

Cycle

four-stroke

Fuel delivery

carburettor

Oxygen sensor

no

Engine control

other

Catalytic converter

TWC, single bed, open loop

Air injection

PAIR

Rated power

6.2 kW (≈8 hp)

Rated speed

7,500 rpm

Transmission

CVT (belt and variator)

Sales area

50S

Vehicle built by

Zhejiang Senling Motorcycle Co.Ltd.

Test vehicle model

GN150T-15

Filing history and where it was sold

Titan Imports filed one certificate under this family, for model year 2024, sold as 50-state, California included.

The vehicle itself is recorded as built by the same company, Zhejiang Senling Motorcycle Co.Ltd. in China — engine and chassis from one source.

Certified emission levels: CO 9.8, HC 0.5 g/km.

Other records carrying the same engine code

Titan Imports certified an engine with this code under 2 other family numbers — the same engine filed again in another year, or in an off-road and a street version:

• NTTNC.150MC1 (2022)
• PTTNC.150MC2 (2023)

A shared code from the same factory is a strong search lead. From a different factory it is as often a naming coincidence. Either way it narrows the search; it does not settle it — measure before you buy.

Models certified under RTTNC.150MC2

Every model designation the importer listed on this certificate. If your machine's model name appears here, this is the right record — even if the name on the bodywork is slightly different.

MP150-01 · MP150-02 · MP150-03 · MP150-04 · MP150-05 · MP150-06 · MP150-07 · MP150-08 · MP150-09 · MP150-10 · MP150-11 · MP150-12 · MP150-13 · MP150-14 · MP150-16 · MP150-17 · MP150-18 · MP150-19 · MP150-20

Other American badges on engines from the same factory

• Zhejiang Xinba Technology Co.,Ltd. · 49-50cc6 American brands · 2020–2026