Hi all, I bought a Z250 in July and I'm thinking of adding on an aftermarket exhaust.
I went to a big and famous motorcycle shop and they told me I should upgrade whole exhaust system (Yoshimura slip-on and linkage) for almost RM4,000.
They said that would add about 5hp more as they did a dyno test before.

However, when I went to another shop, that one told me there's no need to upgrade linkage, and that full upgraded system doesn't add more than 2-3hp.
This shop also told me that instead of buying expensive, well-known brand slip-on exhaust, I could just pay under RM1,000 for a good Thai exhaust and still get the same 1-hp boost that more expensive slip-on gives.

My question is a full upgraded exhaust system really would give you more power?
If not, and since all slip-on exhausts only add 1hp, should I just go for a quality Thai exhaust and not bother with well-known brands?

I'm not looking for just upgrading the sound of my bike, I'm actually interested in upping the engine output a bit more.

change the exhaust for the feel and sound and not d performance..since u wnt get much of a differences in performance there..

full system gets about 5% increase, so if your bike low HP, increase little bit, if high HP, increase alot

just get any replica la if u just want to change the sound

5hp? sure not? even cbr500r full system oso dun have that much eh.....

if wan sound go slip on..

why on earth would you want to change the exhaust just for more power?

it's cheaper to just change to a 600cc crotch rocket or literbike

3 - 4 hp increase is nothing significant. even the infamous mesin jahit sound from the twins will stay there no matter what exhaust is used (ixil included)

yes, i also ride a parallel twin, so i know.

exhaust moto manyak mahal woo...

kereta R3 punya full set xsampai RM4k..

imo, since urs is only a 250, just go for a slip on.
upgrade to a 600 once u need more kick.

I just bought the bike, how to buy a new one?

Okay lah then, so now I know full exhaust upgrade is not worth it at all.
I'd just get a slip-on.
Thanks guys.

so susah, go buy 5 damacai ticket and stick to your bike, instant +5hp

later kena curi mcm member aku kena

invest in good protective clothign like helmet, jacket, gloves & boots

they will make your ride more enjoyable

at speeds above 100km/h, u can't hear your exhause noise. it's all wind noise.

so u buying an expensive exhaust upgrade is for other people to hear

Hmmm get ixil/yoshimura

Or tamer sound get arrow

Performance? Full system but gained no more than 1~2hp

For naked 250cc edi good enough

Ok here is my honest feedback. based on my years of experience in this field.

1. Muffler only adds a rough amount 0.5-5 hp to a bike based on the CC of the bike. (ciplak muffler only makes sounds and also maybe decrease in hp)
2. Full system adds roughly 1-15hp again depending on the cc of the bike. (forget about ciplak)

now... here's the cold hard fact. apologies if this sounds harsh a bit, but note that no pun is intended.

250cc can only go up to a certain level of HP, you can feel the small and subtle differences when you upgrade this and that, but the amount of money you need to fork out, is simply kerja bodo. further more when you sell the bike later, the price effect is not much of a difference. so best to leave it as is.

I would rather recommend that you look for a higher HP bikes, you get the best "bang" for your dollar.

but if there is a possibility that a modified 250cc bike can beat the shit out of a 1000cc bike without costing almost or near the price of the 1000cc bike, then your investment is surely worth it. but then again ada ke?

Not to discourage your intent for NFS (need for speed) feeling, i've been riding for way too long and seen too many unnecessary problems caused by aftermarket parts that only helps a bit. running the bike as is, is more cost effective as all items are design for efficiency. again 4k for a full system? might as well sell the 250cc+4k is almost half the downpayment for a 1000cc bike or even pehaps a cash buy for an older model 600cc-1000cc.

my humble thoughts.

Save that money, sell off your 250 go buy a 2nd hand er6n. In stock condition it already gives more than double the power and hp than a 250 with full system can max out.

There is no replacement for displacement. Dont be penny wise pound foolish.

You just broke his heart

Thanks, exactly what I was looking for. When the shop told me, I thought it was a bit BS, but they are a big company in KL so I was unsure.

I have all the protective gear already so I was looking for some basic stuff most people upgrade their bike with.
I already have sliders, a radiator cover and a bigger wind shield as part of a safety upgrade package.
I don't travel much, just from Melaka to KL to visit friends.

hmmm currently using full yoshimura exhaust

what i can say is yoshimura exhaust fiber dont last long ........
around 15k mileage sound change already.

no la bro... just the truth, you know me

There are some shops you can trust, but majority of them nowadays are just to make a quick buck out of you, sadly.

Correct, those are what you should spend money on, gears, protectors especially for you and then your bike, in that order. The next best thing you can spend money on will be your tyres (good tyres helps a lot during rain, coners and especially braking).

Melaka to KL is not that far bro, with the standard Z250 you can reach in about 1 hour. it's good enough because any faster, you'll get a summon... which is so not worth it.

good luck mang. may you emergency brake and die soon.

Keep the money for a good pair of tires. Tayar mahal bang...

bike can get speed summon?
or compound for reckless riding?

cause so far i always ride over the speed limit, touchwood didnt get any speed summon for bikes...

I kena before dy with my Cagiva doing 180kmh++... but I didnt pay immediately and went to court. To make story short, I only pay RM 30.

Pakai slip on biasa2 dah ok sebab mesti ko nak bunyi ja bass.
Kalau nak masuk track baru tukar full system.

Bila tukar slip on pun better tukar air filter racing such as K&N or BMC.

setakat 250cc tu takyah tukar pun takpa

btw, does choosing brand of engine oil affect performance as well?

1 hour? It usually takes me 2 hours, and that's pretty fast enough for me.

So okay then, only things left to do are a slip-on and tyre upgrades. And aftermarket air-filter with the slip-on.

hye bro @SCy2j.. i myself owner of z250

i change to full system scorpion a month after purchased.. performance wise u will not fing significantly except more easier to get 170 kmj (cut off after that)

d sound.. yeah that's the holy grail when u throttle it.. heaven and earth if u compare with the standard

This post has been edited by monodevil: Nov 19 2014, 05:45 PM

Thanks for your feedback man. Now I know what to do.

yes, it does but too little to feel... the most you can feel will be at gear changes... smoother, easier and less noise.

yup, i do it in 1 hour

better you go for the K&N air filter & good spark plugs... more horsies gain rather than the slip on and lesser cost... once you done these small and essential upgrades... if you still want a little more, then go slip on...

not sure about the 250's but for bigger cc EFI bikes, if you change the air filter and exhaust, you might need to remap your ECU. otherwise the performance will sux.

I didn't think spark plugs could actually help that much, thanks for the info!

bro,aku pakai ninjA250R.sebijik je cuma moto aku ada fairing.
aku pakai ekzos yypang pehhhh. yoshitmurah,sakaipovic, dan toplelvince semua boleh muflis liau.
bunyi power, top memang cun,siap potong er6 kat karak.

small cc bike...dont bother to change exhaust la
no gain at all, only exhaust note different aka louder
better save money get better bike

anyway yoshimura slipon original around RM2k only

for ur current bike, since u start using it, what brand of engine oil u have been using?

i'm using motul 5100 15w-50, but after 4k mileage, 400ml engine oil gone...thinking to change to other brand...

save bit more money..

with all the money + traded 250..

go for bigger CC...

theres 1 bumblebee tuono in kg baru with 14K ++ mileage... 63K i think... its 2ndhand tho...

I actually concur with celicaizpower
Changing the exhaust won't benefit much on the speed.
There is , but only a slight increase on the horsepower and top end speed.
To be honest, a 250 cc changing the exhaust is merely cosmetics and sound emphasizing .
A parallel inline engine would sound like a thumping bass.
Just get a cheap one roughly below RM1k that would suffice.
The other 3K can be invested in other materials such as the paint , tyres , sliders , fenders and so on.

This post has been edited by AccelTech: Nov 20 2014, 11:13 AM

NGK has 3 types of plugs, the normal, the type R and the red color box for race purpose. try check if they have the red box type for Z250.

On my own personal test from majority of brands, I find that Silkolene & AGIP are the best.

Honestly speaking, Motul, Shell and a lot of good name brands has knock off... do buy from a trusted workshop. I assume you might kena the knock off or your engine got leak or burning engine oil.

Now, some people might disagree when I say this, the best SAE rating to use in Malaysia will be 15w-50. This SAE rating would be just right for our weather. 10w-40 is too thin and easily burnt off... while 20w-50, you might need to start you engine a couple of time during cold. If you are using a V-Twin engine, there are new oils which have XXw-60 rating, this will be the best choice but if you are using Harley then get the 20w-50 specifically designed for Harley V-Twin.

Please note I have a lot of bikes and no car. hehehehehe

but to me best to use original because afraid that the ciplak one might decrease engine performance, unless you tested the ciplak one before and got umph.

Silkolene, another fren of mine also suggest me this.
i think depends on type of bikes and usage also to determine what sae best suite.

for moderate usage, that revving low and speed no more than 100km/h...normal 100cc below bikes, those use 10-30 or 10-40 are best.
for big cc bike and always speed fast and revv alot, 15-50 is the best...

same concept applies to car..

however there are some folks using HDEO for bikes and cars.. https://www.facebook.com/groups/281763805178476/

I noticed that quite a few ppl said to buy a 2nd hand ER6 if I wanted to move up to a bigger bike, but how come no one recommended CB500 line of bikes? They cost just RM3-4k more than Z250.

Needing help. How much does it cost for the scorpion u got?

Scorpion full system can get around 2.1 - 2.2 k.. muffler maybe 1.5 - 1.7k

Meh, buy slip on arrow and remove the silencer. voila. enjoy the bass sound.

Go for Akrapovic slip on instead of Yoshimura.

Akra have better sound and power, Yoshi sounded lousy.

Tested on my friend's Z250 with Akrapovic, his other friend's Ninja 250 with Yoshimura.

im getting z250 next week which exhaust is recommend? i just need sound. is akrapovic slip on good enough?

Bro .. u might interested to join ZFRC (Z250 Force Rider Club).. so far its the most active club dedicated for z250..u can get much info in their fb

So far they have about 500-600 members

p/s: my personal view as my self owning z250.. akra already too mainstream, yoshi (ori) seldom i see..me myself on scorpion