Fitting Jets On My NSR 125 R1 2004!

[18_stuart_88]

How long does this take to do?

How easy is it?

And

Could sombody talk me through an other kind of process that i need to do apart from screw in the jets?

Ive got them the now and about to do it, just needa few tips!

Stu
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Make: Honda NSR 125 R Year: 2004 Colour: Black And Silver - Died on December 18th 2005, Layed to rest December 30th 2005 :(Make: Aprilia RS 125 Year: 2000 Colour: Black And Red - Derestricted Sold!
Make: Suzuki GSXR 600 SRAD Year: 1998 Colour: Red - White - Blue
Pic of My New Bike!!

[Biker-Kev]

unless you really know what you are doing, or you have somebody watching you who knows what they are doing, i would really advise against doing it.

It is quite easy to do though.

Take the carb off, and if its the main jet you are changing, its at the bottom, under the float chamber, whip it out, and put in the new one. When you have your carb off, may aswell give it a clean up.

But tbh you would be much better giving it to somebody who knows what they are doing.

Kev
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Zhongyu ZY50, Aprilia SR50, Motorhispania RX50, Aprilia RS125, Honda VFR400 nc24 and my corsa
https://www.bikepics.com/members/bikerkev/
Theory: Passed 8/11/2005 Practical: Passed 13/12/2005 Proud holder of A2 license

[18_stuart_88]

Hrmmmmm! Its all three im changing

Bugger!!!!!!!

I pop a thread on the Scottish section see if anybody knows what they are doing and if they can gimme a wee hand.

Cheers Kev

Stu
____________________
Make: Honda NSR 125 R Year: 2004 Colour: Black And Silver - Died on December 18th 2005, Layed to rest December 30th 2005 :(Make: Aprilia RS 125 Year: 2000 Colour: Black And Red - Derestricted Sold!
Make: Suzuki GSXR 600 SRAD Year: 1998 Colour: Red - White - Blue
Pic of My New Bike!!

[Biker-Kev]

lol,

Best of luck with it m8
____________________
Zhongyu ZY50, Aprilia SR50, Motorhispania RX50, Aprilia RS125, Honda VFR400 nc24 and my corsa
https://www.bikepics.com/members/bikerkev/
Theory: Passed 8/11/2005 Practical: Passed 13/12/2005 Proud holder of A2 license

[alains]

it's fairly easy to change them providing you have taken the carb off . download my file https://www.geneva-racing.com/~alains/NSRtips.doc
the easiest is the main jet which is screw on top of the fixing float chamber bolt . you will find the others easily
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the worst day fishing is better than the best day working

[18_stuart_88]

Does the whole CArb need to be completly off Alains? like of and in the palm of my hand.

Ive never completly taken it off like that, ive keept it attacked by the Cable that through the middle of the chamber!

Is it still possible to do this with it all intacked able to access the bottom of the carb?

Stu
____________________
Make: Honda NSR 125 R Year: 2004 Colour: Black And Silver - Died on December 18th 2005, Layed to rest December 30th 2005 :(Make: Aprilia RS 125 Year: 2000 Colour: Black And Red - Derestricted Sold!
Make: Suzuki GSXR 600 SRAD Year: 1998 Colour: Red - White - Blue
Pic of My New Bike!!

[alains]

look my file , you will see . it's too long to explain , and it will take you about 1/2h to take off , 1/2 h for cleaning and changing jets , 1/2 h to set everything . best tools set of sockets 1/4" and i do not remember the spanner size (you need 2) to take off the axis bolt of the tank .
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the worst day fishing is better than the best day working

[18_stuart_88]

[theshmoo]

stu carb has been re jetted and he still has a flat spot when the bike heats up. Anyone have any ideas
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CBR 1100 blackbird.

[alains]

valves timming and plug
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the worst day fishing is better than the best day working

[theshmoo]

plug i can do but valve timing ? not to sure
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CBR 1100 blackbird.

[18_stuart_88]

Alains!

What about a Power Valve is that worth the invstment from Matt Copper?

Stu
____________________
Make: Honda NSR 125 R Year: 2004 Colour: Black And Silver - Died on December 18th 2005, Layed to rest December 30th 2005 :(Make: Aprilia RS 125 Year: 2000 Colour: Black And Red - Derestricted Sold!
Make: Suzuki GSXR 600 SRAD Year: 1998 Colour: Red - White - Blue
Pic of My New Bike!!

[theshmoo]

Get the power band from ebay and i will fit it for you.
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CBR 1100 blackbird.

[alains]

look my file and the diagram about valves sequence
https://www.geneva-racing.com/~alains/NSRtips.doc
the cables must be without play but not tighten too much . pulling out the sheaths will tell you how tighten they are , but it's essential that they open fully over 7500 rpm or when you put key on without starting engine . at this time check the sheath of the pulling cable , if you've got a play your valves do not open fully . to compensate , undo the screw on top of the pulley , lift up the pulley , pull out the pulling cable , with a piece of cupper wire (the one you use in your house, about 1mm diameter) , make a ring around the cable (this will make a thickness between the sheath and it's stopper) and it must go inside the stopper, refit the cable and the pulley .
note : using the adjuster will only work on the other cable , and why doing that ? because in use the cables come longer with the time
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the worst day fishing is better than the best day working

[alains]

what is a power band , my technical english is not good enough
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the worst day fishing is better than the best day working

[theshmoo]

power band is a joke band a rubber band that some people buy from ebay to make there bike go faster. it is also when your rpm is giving you the most power. on my nsr between 6800 rpm to 9500 rpm
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CBR 1100 blackbird.

[alains]

where do fix it ? and have you got a picture of it ?
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the worst day fishing is better than the best day working

[18_stuart_88]

Their a joke mate! It just some local scammers from ebay who try to steal money from deranged bikers who dont know about their inner working of their bikes and just want it to go fast.

In my bike the powerband is between 7500 and 10000RPM, its just that extra bit of power the bike provides!
Doesnt yours have that Alains?

Stu
____________________
Make: Honda NSR 125 R Year: 2004 Colour: Black And Silver - Died on December 18th 2005, Layed to rest December 30th 2005 :(Make: Aprilia RS 125 Year: 2000 Colour: Black And Red - Derestricted Sold!
Make: Suzuki GSXR 600 SRAD Year: 1998 Colour: Red - White - Blue
Pic of My New Bike!!

[alains]

you should reach 12000 in 5th gear as i do myself . so if i am not just a pretty face , my power band is between 7500 and 12000 rpm
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the worst day fishing is better than the best day working

[18_stuart_88]

11000 RPM is my red line! Anything between 10000 and 10500 RPm it kinda screams "i dont wanna go any further or ill blow up" to me!

But i bet your bike a 2 stroker beast! beause you have all the big knowledge of how to keep your bike to the absolute best of it ability! Tuned up to the maximum

Stu
____________________
Make: Honda NSR 125 R Year: 2004 Colour: Black And Silver - Died on December 18th 2005, Layed to rest December 30th 2005 :(Make: Aprilia RS 125 Year: 2000 Colour: Black And Red - Derestricted Sold!
Make: Suzuki GSXR 600 SRAD Year: 1998 Colour: Red - White - Blue
Pic of My New Bike!!

[alains]

i could have done better , but should i need to ?
certainly not !
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the worst day fishing is better than the best day working

[18_stuart_88]

Well ive sorted my spark plug to its proper distance apart.

The flat spot is still there! You got anymore ideas to what i could do to fix this!

It is the most annoying thing ever! It envoled a lot of sudden gear changes before my rev counter reaches 6000RPM's.

Stu

P.s. Is it the CDI unit that is compltely messing with my bike? If i get a new Uk model CDI unit will this completely sort this problem or will it just run faster but still with the flat spot?

Alains are you still selling those electronic boxes that you sold The Shmoo? If so i would quite like to invest in on?
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Make: Honda NSR 125 R Year: 2004 Colour: Black And Silver - Died on December 18th 2005, Layed to rest December 30th 2005 :(Make: Aprilia RS 125 Year: 2000 Colour: Black And Red - Derestricted Sold!
Make: Suzuki GSXR 600 SRAD Year: 1998 Colour: Red - White - Blue
Pic of My New Bike!!

[OreoXX]

Did you check the needle?
And there will be some hesitation through the power band when the valves are opening (6500-8000rpm) when the bike is still cold. Warm it up properly and take it for a long ride!! If the "flat spot" is still there, then check the valves timing.
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Honda NSR125RR '01 Fully Derestricted w/ Gianelli Exhaust and Carbon Can

[alains]

unfortunatly the make of the electronic circuit has ended . but with the doc , you will able to build your own . all components are worldwide avaiable and cost peanuts . it's also possible to insert a resistor 1/2W 2.7 Kohms between the light green and the red/white wire coming from the servo-motor (it will do nearly the same) .undertstand : the biggest restriction is on the valves opening because a total opening will make your rpm higher , the restriction on CDI is minor but goes with your rpm limitation . as genuine your max rpm is 10500 , better openning will allowed more rpm but your cdi is still limited at 10500 . so you can see that one goes with the other and if your power is with the genuine exhaust it will take time to reach 10500 , but with a race exhaust you will add some more bhp and get red zone faster . so to be precise :
- TV-78 valves control unit
- CI626 as CDI unit (you can spend £200 for a programmable one which will be much better)
- jollymoto 402 carbone
- carbon reeds (make engine smoother)
- BR10EIX (race plug)
- UK specs barrel & piston (different from french)
with all this you will be fully de-restricted without modifying the top-engine (it's possible to gain 4-6 bhp)
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the worst day fishing is better than the best day working

[18_stuart_88]