Yz125 Big Bore Kit Hp

No crank mods required.

Yz125 big bore kit hp.

In our opinion it is the perfect bore only displacement available for the yz125. Lastly i am thinking about just sending th. The easiest route to making your yz125 a yz144 would be to install the athena big bore kit. Running an fmf fatty pipe and shorty silencer boyesen rad valve hinson clutch and a uni filter.

100 octane suggested for most conditions. However the port area only goes up linearly. Hp store a wicked fast yz125 big bore stroker. This was not money well spent.

My current bike is a 2017 yz 125 which i like a lot but after 25 hours of riding i came to the conclusion that it really lacks power. Eric gorr is 500 and use your old stuff. Precision machined to exact specifications. I therefore consider buying the new gtyr kit which virtually includes a whole new motor.

What a huge difference in power. It requires you to send us your yz125 engine and we will modify it to a yz167. Due to the math of it all when going big bore every time you add bore size your displacement goes up by half the bore size squared. The yz144 big bore kit does not come with an exhaust pipe so we ordered a 239 95 gytr exhaust pipe and 124 95 silencer to enhance the package.

It s no more difficult to install than replacing the piston in your 2 stroke. This means all things being equal. We have built more yz139 s over the years than any other kit we offer. Rpm motorsports did the 139cc big bore kit on my 2000 yz125.

Hp kit is an athena just fixes it up for 800. Re chambered to work with the custom wiseco big bore piston and stroker crank. It has everything you need from piston and cylinder to all the gaskets. I am thinking about a 144 kit for my 02 yz125 i picked up.

It was built by keeping the same bore as a yz125. I can port and do the head mods so maybe its worth it. The athena is under 600 but people say it is crap. Re chamber to work with the custom wiseco big bore piston.

If you are racing thr 125 in schoolby 2 local racing or just want a killer big bore without case mods this combo is insane cylinder boring 144 porting tailored to each customer powervalve machining 144 head machining specific to fuel and customer replating piston and gasket kit yz125. A friend of mine has a tm 125 and there is no comparison in terms of power especially on top. Click here or the picture below to order your yz125 athena big bore kit from amazon today. Our starter package for the yz125 makes around 37 hp.

Bore port and replate with ceramic nickel bore coating.