aprilia rs 125 rescitced speed?

18aprilia · I don't get it? Joined: 09 Oct 2004 Karma :

hi all i own a rs 125 but failed my test so the but is rescitced, they guy at the bike shop told me that the bike would doo 50mph, then he told me to have fun, i thought at the time he was taking the piss, but it does the 50mph which sucks, im 18 years old and have a theroy cectrfiatae and a cbt but my mates honda cbr 125 does 80 and he only has a cbt what the fuck is going on? can anyone please help me, i live in brighton. please please

cheers ross

Minky_monkey · Traffic Copper Joined: 01 Aug 2004 Karma :

Even restricted, the bike should be faster than that! I would've thought 75-80. The CBT restriction only holds you to 14bhp, not the top end speed.

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

A restricted RS125 should do around 80mph true top speed (so it will indicate somewhat more). It should certainly be quicker than the CBR125 (it is about the same weight and the RS has marginally more power).

At 50mph that is 80kmh which fits in with one of the German licence categories. My guess is that your bike is a German import with this speed restriction in place. I don't know how they are limited to this speed I am afraid.

All the best

Keith
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tatters · Exxon Valdez Joined: 05 Jan 2004 Karma :

the german speed restiction on the honda NSR125 that restriced it to 50mph was a small plug in black box, maybe there is a simular on your rs125, have a look around some german sites for a de-restriction guide.
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18aprilia · I don't get it? Joined: 09 Oct 2004 Karma :

lol no it aint german the guy at the bike shop resctied fuck know's why i think its damgeing my bike somehow, what the fuck he had to tuch it for i dont really know. it doesnt go higher then 5 thousand rev' its limted to that.

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Ah, right.

Is the bike fully run in?

If so take it out and thrash it. Get up to around 8000rpm in first gear, then rev it to that through each gear. Do not let the revs fall below 6000rpm.

I suspect if you do that it will do around 80.

The flat spot I mentioned between 5000 and 6000 is very severe. There is a massive amount of ignition retard between those revs, and in the high gears the loss of power is so much that the engine does not have a hope of getting through it (although if you slip the clutch to get past it you will be OK).

If you hunt round online you will find instructions on how to bypass this restriction and get rid of the flat spot. Basically there is a particular place you dig out the sealant on the CDI unit to find a metal "bridge" on the circuit board. Break this bridge and you get rid of the flat spot. Then seal it back up.

Basically the cdi unit has both ignition curves in it, and breaking the bridge switches it to using the one without the flat spot.

All the best

Keith
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18aprilia · I don't get it? Joined: 09 Oct 2004 Karma :

cheers

tony532 · World Chat Champion Joined: 29 May 2004 Karma :

is it under warranty?

take it back and demand the bike be looked at

as it should go about 80 mph

50mph my bottom

in fact go to www.apriliaforum.com goto the discussion forums and the rs125 one and they will help you out

18aprilia · I don't get it? Joined: 09 Oct 2004 Karma :

yeh the bike is under warrnty, i havent really had much fun on it to be honest bit of shame really started off on the wrong foot so to speak

bozli · L Plate Warrior Joined: 22 Mar 2005 Karma :

i got a 99 Aprilia RS125 and was told when i bought it (private) that it was restricted. But i can get 93 out of it??? Surprised

mine will only do around 45-50 though before i hit the second power band at around 6000 rpm.

Gazdaman · I did a trackday!!! Joined: 12 Aug 2004 Karma :

I hate to be pedantic, but the word is restricted. You spelt it wrongly on 3 different occasions.

Either way, a normal, 14.6bhp restricted RS should do 80mphish.

Gaz

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

Second powerband? Confused

Maybe your just being a scaredy and dont want to rev it?

Unless you brought a 50 with a 125 sticker on it and the dealer duped you into buying it. Rolling Eyes

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Keith · World Chat Champion Joined: 24 Mar 2004 Karma :

bozli · L Plate Warrior Joined: 22 Mar 2005 Karma :

yeah sorry thats me being dumb (power band, not second).
im startin 2 think that mine aint restricted but my m8's got a 04 plate rs and his can do about 110 derestricted??
and my power band is at 6000rpm not 8000 like some others i know?? im confused

lol

Liverpoolrobb... · Crazy Courier Joined: 20 Mar 2005 Karma :

whats the top end tottaly derestricted on a RS125? before redline?

MinhDinh · World Chat Champion Joined: 01 Jan 2005 Karma :

i dunno what has been done, but the power comes back at 6 revs. although when your bike is not run in i think the manual suggests not reaching 6k revs. 50 is easy.
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Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Standard restricted bike will have the power die off at 5000rpm and come in again at 6000rpm (easy to fix with a mod to the cdi unit) then have power die off at 8000rpm.

Played with it will go acceptably up to 8000rpm where it will wake up and go quite well.

All the best

Keith
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