Hyosung GT250R mods on a budget

[gatch]

Nah the shinkos skitter around like you are on ice - they are fucking scary in the wet or the grit.

It's good training though, because you learn to relax and let the tires have their little tantrum - and lo and behold you are still upright!

Steve

My vfr came with IRCs front and rear, I have never been so scared for my life in the wet..

[CookMySock]

My vfr came with IRCs front and rear, I have never been so scared for my life in the wet..

Yeh but they don't ditch your arse - they just make it feel like they are going to ditch your arse.

This is not a bad thing! You get used to the sensation and don't panic. To make quality tyres talk to you like this takes either great levels of skill, or great levels of stupidity.

Steve

[sapperj]

After riding with the K & N airfilter I realised the Induction Roar was so Fkn loud that...
a. I couldnt hear / enjoy the exhaust note and
b. My teeth hurt from the noise

SO...

I was going to see if I could fit the airbox over the filter but while playing around I discovered that it fit snugly inside the oval of the airbox, so I made a plate up, screwed the K&N to it and dropped it in the hole like a std one would go...

NOW...

Off for a ride to try it out

[CookMySock]

I made a plate up, screwed the K&N to it and dropped it in the hole like a std one would go...

But why? That same airbox and stock filter will flow 80hp on the 650. Whats the point?

Steve

[sapperj]

But why? That same airbox and stock filter will flow 80hp on the 650. Whats the point?

Steve

Because I allready had bought the K&N... and cut / modded the stock one as previously discussed. I figured I might as well use what I've got... If only I knew then what I know now...

And yeah, much nicer to ride... can hear the exhaust again

[yokel]

Hi there people, I've just got my self one of these Hyo gt250s and looking at doing the mods thing.
I guess the first thing is a new muffler witch is a given but would like to know if there is any performance gains in ditching the catalytic converter?
Any other usefull tips on mods would be great!

Chur
Scott

[sapperj]

I guess the first thing is a new muffler witch is a given but would like to know if there is any performance gains in ditching the catalytic converter?

Cat converter? where is that?

[yokel]

Well I'm assuming that were the header collector is is some kind of cat? but maybe its not?
anyways I need to run the thing in before I get too carried way!

[sapperj]

Yeah as far as I know it is just a collector, not a cat. I have been told by some people that there is major restriction in the exhaust pipe at the point where it enters the box, and looking at it I would agree, even the header pipe reduces prior to the box, which in my mind is backwards... but having spoken to Daemon @ Cycleworks in Lower Hutt, he advised me to leave it as is. Mainly because the cost of remaking the exhaust system would not justify the small gain in top end.
Put a 'nice' sounding muffler on it and just ride...

[CookMySock]

Daemon @ Cycleworks in Lower Hutt, he advised me to leave it as is. Mainly because the cost of remaking the exhaust system would not justify the small gain in top end. Put a 'nice' sounding muffler on it and just ride...

The only exhaust mod that is worth while, is to split the collector box and remove the baffles, as they work loose and rattle like a stone in a tin can - ugh. You might get a little more exhaust snort from it doing this too. Yum.

You might also weld up the little gaps in the pipework so it doesn't "pffft" so much. I don't know if they are there for a purpose, but they make the bike sound like shit so I weld them up - a ten minute job with the MIG and a tin of black spraypaint.

Reassemble the exhaust verrry carefully so there are no leaks - this keeps the bike sounding extra phat and rorty. Put some coppercoat on all the nuts and bolts.

But yeah, a loud exhaust on these bikes is mandatory. If you haven't heard one, you owe it to yourself to check it out.

Steve

[gatch]

Yeh but they don't ditch your arse - they just make it feel like they are going to ditch your arse.

This is not a bad thing! You get used to the sensation and don't panic. To make quality tyres talk to you like this takes either great levels of skill, or great levels of stupidity.

Steve

What ? When the front locks up with only mild braking, tries to slide out from under you when turning and anything more than half throttle spins the rear ? They are shit tyres..

Put some coppercoat on all the nuts and bolts.

Nickel anti seize if you can for exhaust stuff, it retains its anti seize properties better through high temps..

[CookMySock]

What ? When the front locks up with only mild braking, tries to slide out from under you when turning and anything more than half throttle spins the rear ? They are shit tyres..

Ok I stand corrected.

Sounds like shinkos are not quite as bad as that.

Nickel anti seize if you can for exhaust stuff, it retains its anti seize properties better through high temps..

Wft? Is this some modern shit?

I still got my tub of coppercote from way back.


Steve

[sapperj]

I have a mate here at the workshops, will look into the collector box thing... I dont have my own mig
Probally cheeper than remaking the whole thing too.

So Steve, why dont they just have a Y pipe where front and rear headers come togeather? what does the 'collector box' actually do?

BTW I still use copper coat too lol

[gatch]

Ok I stand corrected.
Sounds like shinkos are not quite as bad as that.

Wft? Is this some modern shit?
I still got my tub of coppercote from way back.

Steve

Man those IRC's are just horrid in the wet, ok in the sun, but thats about it.. Give me cheng shin or kings any day..

Yeah nickel is good. We've had plastic forming dies come in where copper anti seize has been used. It has dried to the point where it comes out looking like loctite thread locker and has made getting studs out even harder..

Anyway sorry, back to the hyosungs...

[CookMySock]

I dont have my own mig..

why dont they just have a Y pipe where front and rear headers come togeather? what does the 'collector box' actually do?

Theres lots of cheapo gasless MIGs on trademe. Good fun to play with!

There is lots and lots of collector-box theory and I haven't got into all that. Google is sure to give you hours of great reading on it.

A more-than-cursory look at the hyo collector to muffler pipe, reveals that it's a little special. Theres actually two pipes in one between the collector box and the muffler. Take the muffler off and have a look at the tailpipe. Does anyone know what's going on with it?

Steve