**RS125 Full Power VS. RS250 Restricted**

[scott_hood_88]

I have been looking for secondhand aprilias lately i originally thought the rs125 was the one i wanted, but after looking around the rs125 actually seems to be more expensive to initially buy then the rs250, I am planning to keep the bike till i'm 19 so i will have a year of being able to have unlimited power.

I would just like to know if the rs250 is cheap due to their reputation, reliability and costs, are these a lot higher than the rs125?

Also what is the performance like on a full power rs125 compared to the rs250.

And out of the pair of them which is better handling.

I do no the rs250 is not a learner bike, but i would like a bike which i'd have to work hard to control, as i intend to use this bike as a sunday toy not a commuter.

Thanks

Scott

[Marc_Buck]

Are you riding on a restricted license, otherwise you cannot ride an rs250.

Rs125 topend 95
Rs250 topend is about 135 ish, im not too sure. Restricted will do 100 or a few mph over.

Both great handling bikes, have to really work, so make really fun bikes.

Rs250 is real cheap considering the power these things have, but watch the insurance.

If any of this is wrong please crrect me.
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94 fzr600r

[scott_hood_88]

Yes I intend to have a full licence pretty soon so the rs250 is good value for money? whats the maintanance like? and if i do go for the 250 and have it restricted for insurance purposes who would then be able to derestrict it about two months down the line?

Scott

[Ste]

RS250 is better value for money, but really won't take well to being restricted to 33bhp.

Needs same amount of maintance as RS125, so lots. You can get away with not very much, but when it does need it it will be quite expensive.

The insurance purposes you get it done for are to have the bit of paper to show them if the ask or you have a claim and ask or so you can actually keep it 33bhp. You can't legally remove the restrictors and until you are either 21 and do your accelerated acess course, or your two years from after you did your test have passed.

[Dom_]

RS125's arnt 'unreliable' they just have very short service intervals, many 17-19 yr olds dont realise the amount of work that they need so thats when they start to fall apart.
If you look after it well it will never fail you.

An rs250 restricted is well.....Not worth having as theres not really any power below 8k and when restricted you wont be able to go much above 8k.

My advice is to get an rs125 de-restricted, this will be much nicer to ride than an rs250 thats restricted. The 'true' top speed of an rs125 is between 95-105, the speedo may indicate up to 120 though.
The top spped of a un-restricted rs250 is about 130-135

[G]

I'm not sure what a 33hp restricted bike would be like, but thanks to a dodgy powervalve mine was making 37.5hp.

It definitely felt a fair bit more powerfull than other rs125s I've ridden, though I don't think I've ridden any great ones.

Handling wise I defintely preffered the 250, even though it's got a soggy front end it still felt a lot sharper. But then again I've got it set up as best as possible with the standard suspenion.

Personally I'd go with the 250 just because it offers you a lot more potential. Ride it restricted for a while, then when you're ready you've got a bike that's very capable. Embaressed a couple of R1s at Cadwell a while ago on my stock one .

[Marc_Buck]

What is an rs125 like at 0-60 restricted and derestricted, and what is the rs250 like restricted and derestricted?

By the way, is the rs250 wheelyable?
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94 fzr600r

[Frost]

Fuck yes its wheelieable. RS125's are wheelieable, so the RS250 should have very little trouble.

Fact is that an RS125 is NOT 33bhp, not even at the crank, at the back wheel it would be 28 at best, likely less.

RS250 would be restricted to 33bhp at the rear wheel, thus making it faster.

The RS250 is the quicker, cheaper, better bike. However restriction costs £150, and you cant ride it till after your test. At least with an RS125 you can ride it on a provisional for a bit then derestrict it when youve done your test

[G]

Now here's a thing... I do have some rs250 restrictors not doing 'owt... but I dunno how that works with getting the cert.

The RS250 is wheelyable, but not amazingly well, mine is making 53, about 5hp down on a decent stock one (clogged up exhausts mostly I think... previous owner 'pootled' a bit I think . )

The gearing is fairly high as stock. Mine is slightly downgeared (think just one tooth on rear, may have been more, ie one on the front). When going into the powerband the front will lift in first on a good day or at least go light on a not so good day.

However it isn't great for doing wheelies... I was better on my nsr125, though aint tried much on the 'prilia! At the powerband the revs run out very quickly, lower down it comes down to earth before it gets to the powerband.

[Raffles_Gentleman Thug]

1) the RS250 is very easy to de-restrict (I can tell a responsible rider how to do so)

2) its shit as anything when restricted , it runs badly, doesnt pull well and is generally awful

3) when its de-restricted its a bike like nothing else on earth.
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[scott_hood_88]

Well I will put up with my ped till i've done my tests on the training companys bikes then i'm hoping an rs250 restricted while i'm getting use to it, and then derestrict it once i feel confident with the bike, i would like to know how to de restrict it, as i am a sensible rider, i have yet to fall off or be pulled by the police, i don't really ride around town i usually find a nice bit of quiet road (in the country) if i want to go for a blat, and i'm not really bothered about topend speed as i never really expect to reach this, i'm more into acceleration braking and cornering.

What sort of punishment am i likely to expect having a derestricted bike?? and whos likely to pick up on it??

Scott

[Ste]

You say for when you're getting use to it, when you de-restrict it, it's pretty much a totally diferent bike. You remove the restrictors by taking the carbs off and there will be big washers there, just remove those and put everything else back together. No one has to actually know if you are a sensible enough rider for it other than yourself. Country roads are a bad selection really for going fast on due to the fact they're narrow and poor visibilty and the fact there are annoying things like tractors, cows, horses and general big cars without much room to pass. And the bike will be restricted in it's acceleration just as much as it is on the top speed of it. The only bit which will be the same on a restricted bike is the braking, apart from the fact not from as high speeds or acceleration.

If caught, which is quite unlikely really but there is still the chance, you would be done for no insurance and no license and they'd probably do you for whatever else they could think up. Police could pick up on it, or your insurance company could do but unlikely unless you had a claim on your insurance and even then not likely but it still entirely possible they could, although never heard of anyone being caught by them or the police for 33bhp.

[Frost]

https://www.rgv250.co.uk/dyno.jpg

Thats the dyno output of an RGV (same engine as early RS250's). power band on them is fairly harsh, 60bhp coming through in such a burst in 1st gear would make the front go very light indeed, bit of clutch work and it will wheelie no problem.

restricting it will basically eliminate the power band, making it completly different to ride

[scott_hood_88]

So i might as well buy the bike restrict it then derestrict it almost immediately, as having it restricted will feel like a completely diffeent bike, and this is only for insurance purposes, who will actually want to see the certificate?

And does anyone know if you can do track days on a restricted licence?

Scott

[Dom_]

[Josh|RD125LC]

What would the top speed of an rd125lc de-restricted and with a sports pipe on? I love these bikes!

[Kickstart]

Hi

Full power RD125LC would do 87mph (140kmh) I think, although they would indictate 95mph quite easily. You would gain very little with any normally available performance pipe over a full power exhaust. With major amounts of work you can get them up to around a true 100mph (with the speedo well on its way back to zero).

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Laura]

You can do track days on a restrictrd license I have done two now.
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