Yamaha YZ134 vs YZ144 2 stroke - Motocross Action Magazine 

EreksonJ lmaoo

EreksonJ 😂😂😂😂

Shouldn't make a difference, other than the electron carb is easier to "adjust".

They just like to bolt shit together and shoot videos, not write good journalism. They even "review" off road bikes on MX tracks.

2 stroke or big 4 stroke

The frames are sanded and buffed. If you watch Jay Clarke's video on the youtube channel "dirt bike tv" he has these two bikes and mentions it there

Joz Sports over 9000!

That’s not how this works lol

tom thorne lol, they have blue veins can't ya tell, anyways YZ is a great bike as are Kato's and Huskys, we just need more 2strokes to keep everyone happier in the world! 4t cause cancer, floods, hurricanes and famine, just all round nasty beasts, lol, 2t ftw...

Maverick 4t is definitely responsible for the West Coast being on fire right now too! lol

The Sick Horse Ranch lmao🤙

The Sick Horse Ranch premise to say that I feel for all the people going through the floods and the fires, by no means no respect or empathy them personally, good luck to everyone and all best for recovery, on a serious note!

SJ Rodriguez milestone socal

Socal *

very true. but buying any usa made pipe is the same problem too cause they are all spec'd to a stock cylinder. dep, the old spes, doma, all those pipes were designed with people setting the cyl up already like transfer matching and blowdown time correction. good point sir.

Late comment, but just boring it out to 144cc is the lazy way. If you wanted to do it proper without killing the top end you would have to stroke the crank in combination with a bored cylinder and cut head.

darius bekker seems like they allow up to 150cc in the 125cc Dream race series!

It's only cheating if you get caught................

Rusty Shackleford yeah it's an issue, but also you need to get people entering races, you want to have well organised events, but simple and easy to participate in, would it make a difference if you are an mid level rider vs a pro, no! Pro vs pro, debatable, pros ride on the pipe full gas to flat and 125 won't lose out anything on top, where it is helpful is if you are a bigger rider vs a lighter rider maybe and really tight tracks. Me probably prefer to have a std 125, full aftermarket pipe, (FMF, Bills etc) VForce reeds, maybe a higher compression head! Again debatable but for some tracks in altitudes would help, some heads you can swap inserts for high elevation and lower elevation eg Slavens heads! build it reliable is more important, Samco hoses, def suspension tune as done here, but that's about it, fav bars grips done go racing, have fun if someone's on a 134/144/150 ok rider harder! But just ride and have fun! 🤙

They allow up too 134cc in the school boy class in my area which is 125cc for ages 13-24

Modern 4 stroke technology has defeated the 2 stroke. If it were up to me I'd encourage big bore 2 strokes to race the 250 4 strokes and 450 4 strokes. It'd only make it fair because 2 strokes sleep off the gate.

Built a 144, but not through straight bore. I Stroked the crank on top of it, while getting the cylinder bored, and cut the head in combni to get the 144c. Excellent motor and didn't kill the top end. Probably the best combo if you have the money. Problem is that boring the stock cylinder and dropping in an overbore eventually cracked one of the bridges on the cylinder. Stock cylinder didn't take to well to bore. Sent it out to get re welded. Put it together and was having issues finding the right jetting as no matter what range it would break up. Brought it to the track, leaned it out to fixed the problem and about lap 3 blew it up going through the sand section. Surprisingly i thought it seized, but it was the crank that seized most likely cause of high hours. Keeping it simple and just going to get the head cut and bolt on the stock cylinder and piston.

Garrett Gustafson no yz134

I have a yz125

@@brendenketelsen4417 make yours a 134

Alex Kid negative

Garrett Gustafson explain

Alex Kid ktm is unreliable and stuck with air suspension. Thats not good yamaha has made the same engine for years why cause its bulletproof. Same fork why cause they are not air forks and are very good stock. Ktm loses the air forks and gets some better reliablity we can talk

Garrett Gustafson I've had my stock ktm 125 2017 for a year and nothing happened except the usual piston and rings and I have a 2017 ktm 250 factory edition and it's just awesome nothing to complain about when I first started out we bought a 2007 ktm 85 and 2008 ktm 85 and they where sooo so unreliable the older ktms are unreliable i think

That’s why every bike you see cracked in half is a ktm tho...