Z125 Dyno Results with 3 Basic Upgrades

What power gain do you get from Intake, Exhaust, and Fuel Controller.

[@jmiddle818]

I have a K&N cold air intake, Amazon exhaust and Power Commander 5 on my 2019 Z125 Pro. Pre tune I started out with 7.2 horsepower. After the dyno tuning I was at 8.73 horsepower. A gain of 21.25 percent in horsepower.

[@joeyzsazsa5]

I’m about to grab a Z125 in a couple of days and was wondering should I change the air intake along with the exhaust.

[@lextheap1638]

You still get good MPG?

[@vladimpaler9274]

Check this out kzbin.info/www/bejne/eavJh2RnqL2Di5Y

[@user-ti2kb5fm9k]

Any difference on top speed?

[@arthursherman3672]

What is your top speed now?

[@Venhugendong]

Thanks man! Very informative!!

[@CBRboy1717]

I just picked one up this weekend. I heard a slight rattle in mine coming from the front. Listening to your video I can hear the same noise from yours, so I'm relieved a bit.

[@clubdredd1337]

These things have all kinds of noises from the day you pull off the lot to your first oil change. Rattles, knocks, ticks.. I was trippinnnnn aswell! Hearing the same noise brings relief aswell!

[@CoryRwtfyt]

My new z125, $2600 total. My $200 cbr600, about $1500 after all repairs and new fluids, rubber, brakes. It's honestly better to get a second bike. Or in my case the z125 was the second bike to ride on.

[@coreykimbler5188]

Thanks for the brutal honesty! It helps a lot to hear this as im currently trying to decide what im gonna do to mine. I bought mine with an exhaust already on it, i think ill just swap out the sprocket to change the character and add the stiffer clutch springs and plate. Does this bike benefit from a straight up oil pump like the grom or nah? If so ill probably add that and the 12 bar. Thanks a lot

[@sambumanglag6432]

other than my 110 KLX pro taper bars , RSC easy clutch pull lever I've kept my 2018 all stock. I may think about trying a different sprocket later on but ideally I like how quiet and fun overall this is . spending mass amounts of money for little to no performance gains never made sense to me. besides that I've got other bikes to play with that fulfill my need for speed ( FZ09, WR450 F Supermoto ) and Hooliganism ...

[@Z125Mike]

Have you tried changing sprockets? Factory is 14 front 30 rear i get about 65mph. 15front 30 rear closer to 70 but loose torque. Best combo ive found is 15 front 32 rear get around 65-68 mph and decent torque.

[@DeltaElite121]

Your RWHP is accurate. You need to remember there's typically a 12-18% drivetrain loss so I'd say you weren't under the curve. Either way, sounds like you had a good gain.

[@Boostismyfriend]

I have a 177cc z and it was well worth the money, the clutch upgrade makes the rider experience a lot better also

[@CitizenCycle925]

i dont think i'm going to do a big bore kit, dont think i want to dump any more money into mine.

[@Boostismyfriend]

CitizenCycle I thought the same thing until I started modify mine, lol

[@justboone]

@@Boostismyfriend WHAT IS THE TOP SPEED WITH THAT KIT?

[@hondatamike]

@@Boostismyfriend I just got mine but already want to mod,please illustrate me on the subject of the big bore kit pleeeezz!!! Lol

[@Boostismyfriend]

@@hondatamike if you nota mechanic with grinders and tools, a simple 143 top end and aracer will be the best bang for your buck

[@keithbailey6143]

@1:49 I leaned towards and intimately got the Z125 because of the underbelly exhaust! It was between the Benelli 135; because of its bold exhaust and the Z125 because of its understated exhaust… I found a new Z125 (38 miles on the odometer) for $2500 total, while a new Benelli was going to cost me $4,420.58 OTD. On the Z125 I will never have anything other than an underbelly exhaust on it! I was looking into modifying the stock exhaust, but the header diameter is too small, so I just got a Competition Werkes GP exhaust… the only other underbelly exhaust available.

[@Thesaviorsway]

There is also a tst undertail exhaust

[@CharlieDTE]

Hey man - just went down the rabbit hole watching all your Z125 videos. Seems like you had fun with it while you had it. SUPER curious one about thing though…when you got it tuned, did you leave the DB killer in? I recently purchased “Zoom” brand exhaust which came with a removable baffle. Literal night and day difference on how the bike accelerated with and without the baffle in (better without). I’d be curious to know if leaving the baffle in (if you did) when you got the tune done actually caused the inability to see a SLIGHTLY higher HP increase.

[@cameronstanton3399]

Should do more on this!

[@jakechunasamy9642]

It might blow up though

[@michaelgriffin1601]

Thanks bro! Good video. Ive been focusing on mods like levers, pegs, grips, mirrors, led bulbs, quality of life and comfort stuff like that. The bike feels like a whole different bike, i have an exhaust coming tomorroe because i cant stand the sound and look of the stock exhaust. Was thinking about intake and fuel but honestly i think ill probably just skip on that stuff knowing that i think the money would be better spent on lther upgrades instead of power because its going to be slow no matter what lol

[@musclevation9640]

There is a new 155cc big bore kit out, with larger valve, head, injectors,stroker crank etc. With that and the essential 3 mods you can grab just under 15 horsepower. Also y'all gotta remember, the weight of that stock exhaust is like 15 lbs! I went carbon fiber and shaved 11 pounds off my bike. Power to weight ratio is everything. If you lose weight and gain horsepower, the dyno doesn't take that into consideration. But it definitely translates to the wheel. Another thing no one talks about is getting drastically lighter Wheels, ie; aluminum or carbon fiber. Imagine shaving 20 lbs off your bike right to the wheel.🤔

[@williamgrimes2014]

Yeah, but those wheels are like 800+ each

[@gfarls6945]

Very true! Great insight.

[@nickpeccarelli7593]

they say 1HP = about 7-8lbs... there's an easy 10-15lbs to take off that bike. I love my Z125. I wanna do the Hindle exhaust, but I ride it around town to pick/drop shit off, and go through some powerline type of "trails", so I want to keep it quiet. the stock exhaust weighs i think 8.5lbs. most aftermarkets are about 3.5-4.5lbs. I know the Hindle is 3.5. Check the Sportbike Track Gear videos. They put 3 or 4 different exhausts on it, and other little things it.

[@Boostismyfriend]

Hindel me a great exhaust for the z

[@fopm008]

Thats about a 19% power increase, that's significant for under $900

[@spartanx169x]

You will hardly feel that unless you only weigh 120lbs or lighter.

[@Ferrari360Spyder]

Where are your mirrors from? Nice bike.

[@tomg6284]

Thanks for info. Sorry your gains are so small. Big bore is your best bet.

[@Scotth44]

What type of bar ends are those?

[@CJWass09]

What was your top speed increase?

[@atobg_]

Do you still have this bike? Thinking about getting one before the end of the year but just curious since most of your new vids have been ebikes

[@CitizenCycle925]

sold this bike earlier this year, still have my other 3 motorcycles but people are digging the ebike videos so give the people what they want right! z125 was fun, glad i got it but was ready to move on.

[@jenmac287]

So now you have the optimal out put and dyno results after how much spent...7hp.

[@user-ti2kb5fm9k]

Top speed change?

[@scottfritzler8217]

Can you tell me ...is there a 2020 z125 and a 2020 z125 pro....and if so what is the difference

[@Bogyver78]

In America the z125 pro is manual transmission. The z125 is auto.. in europe the z125 is a full size bike.

[@6fiddy309]

There ain't no replacement for displacement...🤔🤣👍

[@Dtsloan423]

What about a cam to really open it up

[@CitizenCycle925]

at this point i dont think i want to dump any more money into it.

[@alphacapo]

Why use power commander if it's been dyno tuned?

[@CitizenCycle925]

power commanders allow for adjustments to fuel mapping without changing the bike's ECU

[@roadjokers6467]

Should have did a 143 big bore and a tune still would have been cheaper

[@CitizenCycle925]

thought about big bore but didnt think i could do it myself.

[@iMotoTactic00L]

Spending that much money to gain 1hp NO THANKS.

[@CitizenCycle925]

yes, one of the reasons i put this video out. it's a lot to spend and you barely feel any power increase. no sense throwing money at this bike unless you want to go with big bore kit.

[@ZeginMakesMusic]

For $800 I got about 50hp out of my Camaro SS.

[@repnatl]

What mods did you do for a 50hp gain? Keep in mind this is a small Cc bike. For $1000 I gained 100whp and over 200tq just with a tune on my s65. Bigger engines can gain more power from basic bolt ons (especially boosted)

[@chmc9000]

Change your gear ration, i took off the 15 tooth counter sproket and the 30 tooth drive sproket, and swapped them for the 14 tooth counter and 28 tooth drive. Was maxing out at 50 and not i max out 67 mph. And i haven't done any other upgrades yet.

[@thefatmanmx]

Lol Unfortunately your gear ratios are lying to you. In fact your top speed will now be slightly lower than it was before. If you went -1/2+ your speedo will be off by quite a bit. Same speed just read higher by your speedo because it's programmed for stock gearing. You can use a speedohealer to get it to read accurately again. I know this from 12 years of riding and modding motorcycles. The gearing trick works like a charm on bigger bikes, but since these bikes are so small and their power is so limited it's not worth messing around with a good thing (the stock gearing). Best of lucks!

[@hollywoodjoe3259]

Still slow 😂 I bought a pipe and intake still slow .the more money you spend on this bike it’s still gonna be slow .fun to putt around town tho

[@jakeanderson6344]

No big bore? You don’t seem to… nvm

[@CitizenCycle925]

ya, didnt want to waste anymore time or money on this bike trying to make it into something its not..

[@TerryMasri]

$867 for 1 HP? HELLLLLLL NOOOOOOO! And just like you said, you can't even feel it. And the only reason why you "still can't decide if it's worth it" is because your ego won't allow you to admit that you dumped $867 on worthless upgrades that only make a difference on paper. In other words, you're desperately trying to justify your expenditure so you won't bang your head against the wall for being a... well, let's keep it respectful here, but you know what I mean. It's OK though, we all have been there and will go there several times before we kick the bucket.

[@CitizenCycle925]

hahaha, hopefully this video helped a lot of others from wasting the money. i sold the bike long ago after i realized it would be a money pit with upgrades :)

[@CharlieDTE]

Might only be 1.2 HP, but that’s also an 18% rear wheel increase over what the bike had prior. That’s actually quite significant when you think about the typical cost of performance. Imagine if you could spend

[@musclevation9640]

Kawasaki did us dirty with the Z125. So let me get this straight, the z400 has 48 horsepower. The z125 can't even pull 7hp. You do the math. 399cc has 6 times the horsepower but only three times the displacement. And then you do any real mods on the z400 and your gaining 5 to 7 horse easy. So 55 horsepower no problem. And it would cost you about the same as the mods on the z125 combined with the cost of the z125. Fully modded Z, 4,200$- 4,500$. LMAO. The cost of the z400 is $5,000, and it's fast enough to beat any Harley on the road easy. Thousand pound tanks, look good, and loud, but slow.

[@thizzfox]

"performance"

[@sonicboove4865]

Save your money and put it towards a bigger bike.

[@czierwo]

Mine is stock. Keeping it stock until someone finally beats me on track lol! 130/70/12 rear tire is best modification. Speedo is dead on with it. Also lifts rear a bit giving it aggressive superbike stance lol! I currently have 120/80/12 rear with 15t front sprocket and reads 3kmh less than actual. Still outruns all groms bar big bores. 20 some thousand kms of abuse, trackdays and wot for days, running great. No way I'm burning cash to upgrade it. Will likely engine swap it one day instead. Most fun bike of all I own and spectacular community surrounding it. Smiles for miles, all day every day. I am generally doing over 200km per tank before low fuel flash, and topping at around 100kmh. May need testing against gps for precise reading. Spectacular little machine.

[@anothersomebody8195]

What does the 130/70/12 rear tire change do?

[@czierwo]

@@anothersomebody8195 If sprockets are unchanged, 130 tire gives a little longer gearing. It slightly changes geometry bcs rear end becomes taller.

[@anothersomebody8195]

@@czierwo Hmmm, makes sense. I currently get about 68 indicated (62 moh per phone) if I tuck on the freeway with feet on the rear pegs. It's my lucky day when I find a slow semi to draft. Would going to a 130 tire true up my gauge to actual ground speed and also gear it so I could get a couple more mph out of it before hitting the rev limiter? My goal would be to go 60 without tucking (no headwinds 😄).

[@czierwo]

@@anothersomebody8195 same for me. With a traffic to draft, or good conditions in general when everything aligns perfect, I can bring it all the way to redline at around 66mph. Rarely tho. Usually between 60 and 64.

[@czierwo]

@@anothersomebody8195 as per my personal "testing", 130 rear tire will stretch gearing perfectly enough to get speedo read true. Whether you can go faster with it or not depends on how heavy or bulky you are, etc. it's a tough ask from the tiny engine to get you up to 62 without tucking, or drafting. Don't think little engine has enough punch for it.