airbox mods 4 nsr?

jay2 · Two Stroke Sniffer Joined: 13 May 2002 Karma :

can anyone please tell me the best way to mod the airbox on an nsr125 without making it sound like a tank because i fitted a K&N filter and it sounded like a tank with hardly any increase in performance Sad

thanks for your replys, jay.

R6_biker_boy · Derestricted Danger Joined: 24 Oct 2002 Karma :

dont know if its the same but with my car i drilled holes in my airbox its well good.
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some body please help him! i think my dad gone crazy

kev · I Hump Things Joined: 07 Oct 2002 Karma :

have you changed the jets too
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20:02:36 Jammy-R6: any holes a goal
20:02:48 kev: even if its a hairy mans arse
20:02:56 Jammy-R6: hell yes

Ropehead · Could Be A Chat Bot Joined: 02 May 2002 Karma :

i just removed the hose thats on the inlet on my bike (sg350) and it made a HUGE diffrence it stopped the air having 2 snake through the airbox and it now SLURPS air in,
also i had 2 go from a 125 main jet to a 142 quite a jump for a removing a little rubber hose Laughing

but worth the £2 for the jet and a weekends messing Laughing

McJamweasel · BCF Junkie Joined: 22 Mar 2002 Karma :

Have you derestricted already? if not then do that. A race pipe would help as well.
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BCF: Be yourself, just don't be an arse.

Ropehead · Could Be A Chat Bot Joined: 02 May 2002 Karma :

me or jay?
anyway iv got a race pipe early xmas prezzy Very Happy

McJamweasel · BCF Junkie Joined: 22 Mar 2002 Karma :

Jay.

But whoo for your pipe!!
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BCF: Be yourself, just don't be an arse.

Ropehead · Could Be A Chat Bot Joined: 02 May 2002 Karma :

THANKS

jay2 · Two Stroke Sniffer Joined: 13 May 2002 Karma :

Yeh its fully de-restricted n i already have the arrows pipe Very Happy

i also changed the jets when i put the new filter on but still didnt make much difference, it did make a small difference but u could hardly even notice and wasnt worth making my bike sound even more illegal for the performance gain that i got Sad

thnx for your help, jay.

Ropehead · Could Be A Chat Bot Joined: 02 May 2002 Karma :

sounds like the nsr doesn't have a very restrictive airbox then Very Happy

kev · I Hump Things Joined: 07 Oct 2002 Karma :

who set the bike up then
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20:02:36 Jammy-R6: any holes a goal
20:02:48 kev: even if its a hairy mans arse
20:02:56 Jammy-R6: hell yes

Guest · Posted: 16:00 - 10 Dec 2002 Post subject:

i did it myself, with a little help from the guys at my local beedspeed shop. jay.

jay2 · Two Stroke Sniffer Joined: 13 May 2002 Karma :

sorry, the above msg was me, forgot 2 log in Embarassed

kev · I Hump Things Joined: 07 Oct 2002 Karma :

take it to a bike shop and get them to set it up properly
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20:02:36 Jammy-R6: any holes a goal
20:02:48 kev: even if its a hairy mans arse
20:02:56 Jammy-R6: hell yes

tanner18 · Traffic Copper Joined: 13 May 2002 Karma :

a pain in the arse and the wallet jay but the only way to do it properly is to get it dynoed on a rolling road and that aint cheap . your bikes running ok at the mo anyhow. ask around jay to see how every one elses nsr's perform u will be suprised , yours aint sluggish c ya l8a jay Laughing

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Ropehead · Could Be A Chat Bot Joined: 02 May 2002 Karma :

I sorted mine out my self and learnt LOADS Laughing

anyway people have been setting up bikes for years perfectly b4 rolling roads Razz

its a waster of £100 what happends when i fit a new airbox or exhaust!!! another £100 do it your self and learn how your bike works, going up or down one jet size aint going 2 pop ya bike, also thier is LOADS of good info on the net about jetting and stuff.

its just about knowing your bike and how it feels also pleanty of plug chops, needle ajustments, and getting ya hands dirty Twisted Evil

Guest · Posted: 10:32 - 12 Dec 2002 Post subject:

I also fitted a K&N filter on my nsr... I removed the entire boks and fitted it with a rubber hose to make room for it.. It sounded all fucked up. I dident hear the exsos only the sound of air sucking in. I think i also had a 145jet mounted. It dident go fasther eather- it dident pull probely befor i got over 9000 rpm. then straight up to 12000. gOT ABOUT 120 KM/h TOPPSPEED!!! It also started to overheat! I took it of at once. I remember trying top speed sounding like a fucked up mx bike when a gsx-r1000 pulled past me on the backwheel..

The k&n filter is now mounted on a Volvo 240 with 200bhp.

Tel me if u get it to work properly. Need some ekstra speed. It's fully de-restricted with gianelli pipe and doesent go faster then 140 km/h Crying or Very sad

jay2 · Two Stroke Sniffer Joined: 13 May 2002 Karma :

i know it aint sluggish Very Happy

but ive been riding it with the same set-up for a while now and its gettin borin.
the guests bike sounds exactly like what happened to mine, and my nsr also only shows 140km/h on the clock but ive been clocked by tanner at just over 100mph and by mates bike at about 106mph. does anyone know y our clocks are doing this? maybe the import clocks go way out at top end Question

jay.

tanner18 · Traffic Copper Joined: 13 May 2002 Karma :

is it an import????
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jay2 · Two Stroke Sniffer Joined: 13 May 2002 Karma :

yeh its an import but not grey, parallel, its the uk spec exept for the clocks so it aint slow like sum of the imports, has the proper cdi etc. i thought u'd know that tanner, uve bin on it!

Hunter · Nitrous Nuisance Joined: 01 Mar 2002 Karma :

On my RK.. with 28mm carb.

I have my jets running stock (132 mains) and lowered the flat level down to 27mm. Modded air-box with holes drilled carefully for better air-flows (sounds carp.. but its a price i have to pay) Wink

The carb needle too was lowered to the lowest point possible.

I.e. i'm runnign quite lean with 95 octane fuel.

The bike has lower power on low revs, pulls real strong on the top-end. I have taken on all 125s i have raced against and a CBR, starlet GT. Standing quater mile was 14.9 seconds when i checked yesterday, not too bad for a little 125 stroker. We had also played a bit with the ignition timing, advancing it at 4000 rpm.

My friend who races and tunes his Honda RS125 did a 12.8 second 1/4 mile! It weighs in at 65 kilos (93') dry, has many mods!

Top-end overhaul every 6 hours of riding though.. heheh Smile

tanner18 · Traffic Copper Joined: 13 May 2002 Karma :

i was winding you up jay . you know its the speedo that aint acurate your bike definatly does more than 140 km/hr. ive clocked you at over a ton Laughing

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Guest · Posted: 12:43 - 13 Dec 2002 Post subject:

Then what is wrong with my bike then.. 100mph fells imposible. once i had it up in 96 dough.. On a long down hill with a mate sitting on. We also satt up straight(was so fucking cold we dident bother crouching, norway in october:-)

It is a import from the US infact. 80 is no prob, 87 a bit harder but possible but 100 i dont think is possible on a straight road.

What can i do exept the gianelli pipe and de restricting the intake???

I've found a german sight with tuning tips and translated it throug a internett sight. U maybe get something out of this ( bad translation due to difference in language) Let me know if u understand anything:

Tuning section - Discharge opening control The discharge opening control is shut down with some throttled Bikes or opens not completely. This can test you completely simply. Under the left front lining a box sits on the R/C valve or WHEEL valve stands. This screws on, starts the machine and gives full power, when starting and within the lower range the AS would have to be completely open totally or partly closed, with full power. If this the case is not must to it the Stellraedchen (where the push pull cables are hung up) readjust. If these are not hung up, your discharge opening control is shut down, then simply again hangs up and the split pin (if forhanden) in the WHEELS valve not forgotten...

Speed limiter also as "BLACK BOX" regulates this does not admit the number of revolutions starting from 6800U/Min around than 80KM/H off to become faster. Search for one about cigarette box large box with an LED drauf (normal-white green LED) Over it to deactivate you must the blue cables those of the BB leave to pinch off and motorcycle-laterally bring together. Then the NSR goes approx. to 110 140 dependent on other throttles.

Gas notice It a broader wearing part over the gas slidegate valve put that opens thus no longer completely. Gas slidegate valve housing up - the broader being subject disk raus - finished.

Pinion/chain wheel The 80 KM/H NSR the moreover by another translation one throttles. This can take place either by means of pinion, chain wheel or however also both combined. The translation of kind of condition exists in yours and would have to be normal-white 13/35 (pinion/chain wheel).
In order to get the full HP of number (approx. 28 - 34), one must the elbow union aufflexen and the tapering (L - foermig) rausfraesen. Weld shut then simply again. Note: Only for experienced welders!!! Possibly the elbow union halves can be ziehmlich difficult back to bring correctly one on the other. Don't give UP! Alternatively one knows also nen itself running elbow unions to buy - the same brings, costs substantially more (so over the 600 - 700) and has in addition still nen worse sound!!!

Air cleaner/air cleaner box In the intake before the air cleaner and/or, danch tapering can be. Over at maximum speed to arrive these must be lifted out.

Carburetor Possibly a taper ratio (throttle disk/throttle screen) presides or also after the carburetor. Flange simply carburetors and the tapering remove. Finished.

Ropehead · Could Be A Chat Bot Joined: 02 May 2002 Karma :

translated from what language Question

PLACE YA BETS Exclamation

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

German!!
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Regards
Scott