How to make engine choice 150 to 160cc ?

FreakRider · Mar 28, 2013

Hi,

Need a little help here !!

I'am riding my 125cc for a year now. Great little bike Pit Bike MXR-SS 125cc 14-12

But I would like to get more out of my pit bike.

So here are my choices, my dealer as these engines:

- Zongshen 155.2cc
- YX 150cc (new generation)
- YX 160cc (new generation)

I'am no expert and these three engines on display look exactly the same !!! I have no idea what to choose !!

Help please !! Any experiences, stories, rumours ...

Thanks,

Steve

Egan3 · Mar 28, 2013

I have ssr150 tx2. Which has the yx150. Its pretty powerful. Prolly be huge upgrade from the 125

pitrider42 · Mar 28, 2013

Yx160, mikuni vm26, this thing rips!!!!

fatcaaat · Mar 28, 2013

For about 200 you can change your existing motor to a 146 and be on par with the 150. Just sayin'

RockSStR_999 · Mar 28, 2013

^ good point

tmas · Mar 28, 2013

fatcaaat said:
For about 200 you can change your existing motor to a 146 and be on par with the 150. Just sayin'

TB 146cc Bore kit HC Piston GPX Pitster YX Piranha - Pit Bike Engine Parts - GPX YX 124/140 PARTS & KITS - TBW9066 - TBolt USA, LLC

fastatc70 · Mar 28, 2013

The biggest thing you want to think about is do you want to replace your exhaust. The 150 and 160 motors have a klx style head and you will need to replace or add the adaptor to your exhaust.
Your motor dose it have the HD clutch ? Does the clutch arm pull horizontaly front to back or does it pull vertically up and down.

The motor that pulls horizontally is a heavy duty clutch and will take the 142 motor big bore kit ok. If it is the clutch that pulls up and down that clutch is. On the crank and I don't recommend running the big bore kit.

I have a 124 motor with a 142 big bore and a bvh head and it will out pull a stock 155zs or 160 yx motor all day long. Th reliability of the motor is still good. I don't race mx just bar bang around the back yard.

The thing I like about the 155zs and 160yx motors is that you can hop up the motor to over 200 cc. The parts for both motors are cheap and performance parts are plenty full .

Both motors have there fair share of problems when raced or neglected. I think the 125 has less problems possibly due to less hp

fastatc70 · Mar 28, 2013

Sorry the displacement is 146 not 142.

HondaFiddyMan · Mar 29, 2013

I ran a 146 BBK on a 124 bottom end along with a big valve head and TB300 cam and it ripped.

Now I am running a New Gen YX160 with a 184 BBK and an S35 Taky cam... sick!

-HFM

FreakRider · Mar 29, 2013

Thanks everyone !

Mechanic is not my thing, changing the engine, 2 bolts, more like it. But thanks for the tip anyway.

So YX seems to be the choice.

But again, are they big difference between 150cc and 160cc YX ?

Thanks again,

Steve

CYCOROB · Mar 29, 2013

the 146 kit with BVH ripps , installing it is fairly easyand you can run your stock pipe . with the Z motors or YX motor you will have to change the pipe. but between the 155z and the yx motors . i like the 155HO z motor better.

JanssonK · Mar 29, 2013

I would go for the z155. If you cant get your hands on a daytona anima

How to make engine choice 150 to 160cc ?

FreakRider

Egan3

pitrider42

fatcaaat

RockSStR_999

tmas

fastatc70

fastatc70

HondaFiddyMan

FreakRider

CYCOROB

JanssonK

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