please help (rs125 derestriction)

[jasepugh1984]

ive got a 2007 rs125 and i wanted to just fit a power valve to it,just wondering what jets i should go for as its still goin to have a cat in the exhaust and also will i still need to fit a br10 spark plug,thanks,
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Aprilia Rs125 2007 11kw (SOLD) - Honda CBR600RR 2008 (Current Summer Toy) - Honda Cb600 2000 (Current Work Commuter)

[N cee thirty]

i wouldn't have thought you'd need to change the jets for adding the power valve,jet changing usually is when you put on a sports exhaust or something
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[Robby]

Have a look in workshop manual for it, I doubt a change in jetting is necessary to just connect the power valve.

Also, you are unlikely to be fitting a power valve, it should be fitted just not connected to anything. You will probably just need the cables, and maybe the power valve controller.

If there is another restriction in the exhaust then it will need removing.

[jasepugh1984]

i would have thought you would need to upjet as its going to be a performance increase to the bike as its still restricted at the mo with a 132 main jet and a vhst 28 carb on it.im sure fully derestricted they have 185 main jets so i was thinking about starting at 150 and goin up
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Aprilia Rs125 2007 11kw (SOLD) - Honda CBR600RR 2008 (Current Summer Toy) - Honda Cb600 2000 (Current Work Commuter)

[stirlinggaz]

upjetting is a MUST, when adding the pv, as your changing the bike from 15bhp to around 23bhp.(you will gain the remaining 5bhp or so when you remove the cat)
its all in the official aprilia guide, which is available for download,
though your not going to be fully de-restricting it, as to complete the process you will have to change the expansion chamber for one without a cat.
have a look over on 125cc sportsbikes, as i uploaded the guide in the stickies.(if you cant get access to it, pm me as i have it on cd somewhere)
quite why you would want to go through the hassle of fitting the pv without upgrading the exhaust is beyond me, as it will probably be just a case of trial & error & the vhst carb is a bit of an unknown quantity. (as compared to the phbh which has been around for years & pretty much every combination of jets has already been tried)
iirc, others have done the same thing, when doing the de-restriction bit by bit (due to financial rerasons for example)
cheers,
GAZ

[Syris the Indomitable]

Yep! CDI needs attention
Exhaust needs attention
Rav Valve and solenoid actuator needs fitting
Carb needs upjetting and mixture screws adjusting.

De-restriction guide for the Euro 3 here.
https://tuul.tl//10722551.pdf

11 KW 132 JET
FULL-POWER JET 185
MIN. JETU3
FULL POWER S45
THROTTLE VALVE 45
FULL POWER 50
MIXTURE SCREW 1-3/4
FULL POWER 2-1/4
To ensure correct operation of
engine, idle should be set to 1200 rpm with engine warm, after accelerating two or three times up to 3000 rpm

Source this lovely forum: https://www.bikechatforums.com/viewtopic.php?p=2145760
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In Greek mythology Ichor is what immortals have in the place of blood
Those that mind, don't matter...Those that matter, don't mind. Do you agree with this?

[stirlinggaz]

[Syris the Indomitable]

Ignor above because you can't do one without all the others.

Rebuilt RS's

He will won't have known anything about the 185 main jet if I hadn't have posted it.
____________________
In Greek mythology Ichor is what immortals have in the place of blood
Those that mind, don't matter...Those that matter, don't mind. Do you agree with this?

[jasepugh1984]

so is there no point me just fitting a pv? dont want the bike to run like shit
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Aprilia Rs125 2007 11kw (SOLD) - Honda CBR600RR 2008 (Current Summer Toy) - Honda Cb600 2000 (Current Work Commuter)

[Syris the Indomitable]

Yep, to de-restrict an RS you need to follow the PDF guide.

Personally I would fit the PV soleoid actuator, sort the exhaust out(This is a cut and weldjob ), or buy an Arrows exhaust, sort the CDI out then give the carburettor to a mechanic to up-jet properly, even right down the jet sizes and and screw setting on a piece of paper and hand it in.
When fitted and all back together you may just have to adjust idle speed which is really easy. 100MPH
https://www.pjme.co.uk/

Another way:
More expensive:

Buy a dellorto 34mm carb
powervavle & solenoid
Buy Arrow arrow pipe
pippercross air filter
You acn even buy the some racing reeds!
____________________
In Greek mythology Ichor is what immortals have in the place of blood
Those that mind, don't matter...Those that matter, don't mind. Do you agree with this?

[stirlinggaz]

[Syris the Indomitable]

I don't believe the bible either, but friggin nut wrote it!
____________________
In Greek mythology Ichor is what immortals have in the place of blood
Those that mind, don't matter...Those that matter, don't mind. Do you agree with this?