I agree. But you can't HURT anything doing that.Originally Posted by Slyer
Double shot!!
I agree. But you can't HURT anything doing that.
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
Flyboy
He's right, worst it'll do is slow you down a bit, whereas running lean can kill the whole thing!
Yeah, nah.
Scumbag junkie-looking biker
Nice devaluing your bike there.
Hardcore Biker
Talked to the dude fixing up my bike, and he mentioned there's no oversized jets for Hyosungs as of yet.(I know there must be due to other threads.)
Anyone know where to pick up some in Auckland for a Hyosung GT250R? I'm thinking 97.5/100. (custom tailpipe and will desnorkle my airfilter)
Double shot!!
Bogus. The carbs are twin Mikuni BDS26, so just wander into the parts department of any bike shop and ask for jets for that carb.
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
Hardcore Biker
Cheers, will do when I get my baby back.
It's humiliating riding around on the loan scooter >.>
Fair weather rider
Well I have just purchased a cycleworks can and as someone put it "De-Snorkled" my air box, CDI mod allready done by previous owner. I went for a ride to my brothers place and checked the plugs there, all good on std carbies... I noticed much smoother accleration from 0 to 100 in all gears and a stronger top end. As a precaution I will adjust the needles and keep an eye on plugs etc.
Good to see some constructive comments here and I also find it quite entertaining to read the BS.
Keep ur knees in the breeze.
Jas
Double shot!!
The snorkle is part of the resonant intake plenum system, like the port on your subwoofer. Removing it will chop a hunk off the torque peak at around 5-7,000 rpm which is quite likely why you bike feels like it has more top end.
Just guessing.
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
Double shot!!
The snorkle is part of the resonant intake plenum system, like the port on your subwoofer. Removing it will chop a hunk off the torque peak at around 5-7,000 rpm which is quite likely why you bike feels like it has more top end.
Just guessing.
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
Fair weather rider
[QUOTE=a) Modify the stock airfilter (cut the tiny circular hole so the size of the entire oval. Easy-peezee, you'll see what I mean when you take the tank off.
Will take about 30-45mins all up.] actual = 15 mins lol
So Im guessing the sub woofer thingey that was part of the stock air filter is what is being refered to here, so that is what I have done! Alas it is still the original paper element filter so I'm not expecting much in the way of increased air flow.
Have done the needles so tomorrow will be interesting to see if there is a noticable difference.
DB, I did notice that before I did any of the afore mentioned mods, the bike would feel 'retarded' or like it was maxed out at around 10K, now it pulls through 11 1/2 and dosent seem to mind (4th to 5th WOT) allthough I wont be pushing into the red normally, this time I was waiting for it to gag and was surprised to see it push through
Double shot!!
Yes. The air filter element on the 250 is fooken enormous. The same filter element is used on the 650 and that will flow 80hp+, so you should not think that hacking the filter element will do anything useful.
That should give it a kick in the pants at partial throttle. You really need the main jets opened up a little to richen at full throttle.
The seat-of-the-pants-dyno is only useful for drawing immediate comparisons, ie where the power band has moved to. If for example you chopped a hunk off your mid-rand torque, it will trick you into thinking you have just added more top-end power, certainly since you believed thats exactly what it would do.DB, I did notice that before I did any of the afore mentioned mods, the bike would feel 'retarded' or like it was maxed out at around 10K, now it pulls through 11 1/2 and dosent seem to mind (4th to 5th WOT) allthough I wont be pushing into the red normally, this time I was waiting for it to gag and was surprised to see it push through
The whole point of the resonant intake box, is mid-range torque, and you quite likely just chopped a hunk off of it with that mod. Certainly if it was your subwoofer and you removed the port tube, you would have crippled it.
Basically you aren't in a position to dyno it so you are stuck with your mind playing tricks on you.
Best mod should be, do the exhaust, raise needles, and go up a size or two on the main jets. I wouldn't futz with the airbox. It would be nice to fiddle with the ignition timing on a dyno, but thats not really feasible without $500 worth of ignition controller, and $twice that of dyno time.
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
Fair weather rider
Cheers for that man,
As things are looking pretty dirty in there (air filter) I will be looking at replacing soon anyway.
Soooooo on the subject of filters, whats your take on the likes of K&N etc?
Jas
Forum whore
As far as I'm aware only BMC make high flow airfilters for hyosungs and the distibutor in NZ doesn't bring them in anymore. That was a while ago, maybe like july last year? so it may have changed
Hardcore Biker
I'll be installing my K&N High-flow (picked it up off trademe, cost $105 though) tonight and chucking in #100 front/rear main jets. I'll let you know how it rides when I've had a bit of a play.
Double shot!!
As I was sayin, the standard GT250R air filter is also used on the GT650R, where it will happily flow 80hp+. So I'd suggest futzing with the air filter will spend your money no worries, but thats about all, and it will certainly not flow any more air no matter what you do to it, other than pump some air in. (maybe a project to be considered.)
I don't know whether the standard exhaust (other than the muffler) could be improved or not, but my guess is "not". 50mm exhaust is friggen huge for a 250. Vtwins sound awesome with a mildly noisy muffler on it, so that is required "tuning" anyway - gain in hp is irrelevant next to the gain in enjoyment riding it.
It would be nice to tune spark, but there's not really any plug-n-play way to do that, and then you need dyno time to use it, and for perhaps 2-8 hp gain?
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
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