Deresticting

[moosey]

hello i own a hyosung comet gt125 and i was just wondering can you derestrict them? If so how do i go about doing it?

[Beef]

look for an after market sports exhaust and look at re-jetting your carbs but be careful as derestricting can void you insurance if you crash

[moosey]

cheers mate thanks for the info

[Beef]

im not positive with your bike but this is usually the case with small bikes, im sure you could modify an exhaust from another bike if their not available for yours
no wories mate

[Keith]

Four stroke 125's cant be de-restricted, thats pretty much their maximum power output.

To be honest, I wouldnt even bother with an exhaust as the performance gain will be minimal with just an end can and a full system will be costly, if you can even source one down.

If you want it to make a godlike sound on the other hand, a can will do the trick, just wont make it go any faster.
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Aprilia RSV Mille R Edwards Replica - Aprilia RS250 - Suzuki GSXR600 Supersport Race Bike

[moosey]

ok thanks once more for the info,so not really worth trying to derestrict then..thanks lads

[moosey]

If anyone else has any info please tell me.

[Ste]

You can try to de-restrict it but that might be problomatic as it doesn't have any restrictors.

[Del]

hello, I'm also newbie here and also have a Comet Gt125

[moosey]

hello del i think the comets are really good bikes what do you think?

[moosey]

this is my bike.

[Keith]

[Del]

[moosey]

they are big,im 6f 3" and i find them such a pleasure to ride

[lilredmachine]

A good exhaust will give it a boost in power. You can get a performance exhaust at least for an mz 4 stroke-gives a dyno proven 15% increase in power. Though it's probably not road legal and is 300 or so dollars. I've seen comets with slip ons though.

Found a link
https://www.powroll.com/P_MZ125.htm
The rt is definetly a 4t and I think the sx is too.
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Bikes: too many, too much for one man to maintain anyway.

[Josh|RD125LC]

Can't de-restrict 4 strokes as they are already de-restricted. Only thing that might improve performance a fraction is a sports exhaust, make sure its jetted up properly, maybe a bigger carb and whack a K&N air filter on it. But this probably won't make a huge difference, but K&N will make it sound much better.
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Honda MBX50 | Yamaha RD125LC | Suzuki RG125F Lucky Strike | Suzuki GSF600S
RD125LC Pictures

[lilredmachine]

Read post above^^ 15% is alot of power. It takes the mz's to 17.5 (I think) horses, an increase of 2.5. From a 4 stroker 125 that ain't bad.

You say it's a comet? Get it bored out, it's the same block as the 250 but with slieves in I think, or it's not machined the same.
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Bikes: too many, too much for one man to maintain anyway.

[The Tot]

An alternative way of getting a roartier sound is to find the airbox and lop off the airbox snorkel to let in more air - i guess rejetting is recommended as you don't want your mixture too lean, but hell, it makes your bike sound like it's got a bigger schnozz to breath through, makes people think that you may have a 250 because of the louder noise and generally, it boosts your ego a bit. I've run mine without airbox snorkel for about 4 months now (1500 miles) and it's fine - plugs are normal colours which suggests i wont need a rejet. The throttle control is smoother and you will be aroused by the induction suck noise at about 5000 rpm Give it a go.
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The Tot 2019 Z1000SX - 2007 R1
Never argue with autism

[lilredmachine]

Look at this site and look for 125 comet
https://www.unlimited-power.net/anglais/rep3tarifkit.htm
They actually do performance packages and exhausts for it!!

459 euros will get u the entire set.
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Bikes: too many, too much for one man to maintain anyway.

[mchaggis]