My RS50...is it a faulty model?

[tristan]

Hi guys I'm new to this forum.

Basically my query is if my 2007 rs50 is faulty - I bought it last week and the first problem I had was that the fuel light should come on when there's a limited amount of fuel left: I waited and truth be told, it never came on...however the shop did say they would sort it out on the first service.

More significantly though, I'm wondering whether the salesmen is a complete nob becuase he has said wrong things before like "there's no need to warm the bike up" when in actual fact there is. This lackens my trust in what he says. so, my bike was "fully derestricted" as the test ride only saw 22mph on a flat. Course nobody was happy, so all i know from riding is that I will do 30mph easily and probably 40 (although I'm running in, so have to keep below 7000rpm for most of the time). That takes me on to my main question - when i'm doing 30mph in 6th gear that is exactly 7000rpm which put me worng, but that seems lie a high revving for that speed in 6th! Anyway, from what I've seen the stock 07 rs50's derezzed go 50+ usually 55mph on flat. the 5000 rpm i have left i'm sure won't get me to that speed.......

so in essence is he lying by saying he's fully derestricted it because they woudn't want to be found out, or is the bike just faulty? Could it be made like that for 2007 models, or is it fine?

also, I have checked the exhaust and the 2nd pipe that comes out (when restricted) has clearly been cut to about an inch left, and welded. He SAID they have upjetted the carb too.....

thankyou for reading all that lol, and please help.

[nick606]

your bike sounds fine stop worrying... well sounds restricted ofc but all rs50 that arent imports come restricted

and you have a fuel light i would kill for one of them

i have heard the newer models are slight slower because of the exhaust or something simular but that may be crazy chav talk i dont know

[ncrn]

5000 rpm on my bike is the difference between 90 and about 50, so yeh it can make can make a massive difference to your top speed
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[tristan]

yeah I know about them being 5-10mph slower but Is een vids and know people that have it and does 55mph and 28-30mph takes me form 6.5-7000 so can't imagine it would take me to 50 even u know?

I tihnk the speed thing is to do with the expansion chamber position but shouldn't affect the speed that much as it is to me.

[tristan]

[ncrn]

did you just quote yourself and ask yourself a question? :/
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[tristan]

[nick606]

[ncrn]

haha ok

erm well my bike is an nsr125r so I'm not so sure why you need to know, but I have 14 on the front and 39 on the rear.

6 more teeth on the rear will make your acceleration better but with cut your top speed. You say thats on older models though? Might be worth asking a dealer what rear sprocket your meant to have on your year of bike?
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[tristan]

I don't quite know what you mean about which colours but i got the Black and red (not the spaines or black and white)

i asked about your sprocket size just because i know it affects the acceleration and speed.

I researched the aprilia site and my bike should have 14/53 gearing, so i may have mis counted, just wonderd again, because that may have ben someting my dealer ddin't let me know about........My main concern is only that they haven't fully derezzed it like they claim, or if they have why it more than likely won't reach the norm for my bike stock. Ive done 190 miles so far, so is there a chanc eit may even be because the engine parts arent bedded yet?

[tristan]

I don't quite know what you mean about which colours but i got the Black and red (not the spaines or black and white)

i asked about your sprocket size just because i know it affects the acceleration and speed.

I researched the aprilia site and my bike should have 14/53 gearing, so i may have mis counted, just wonderd again, because that may have ben someting my dealer ddin't let me know about........My main concern is only that they haven't fully derezzed it like they claim, or if they have why it more than likely won't reach the norm for my bike stock. Ive done 190 miles so far, so is there a chanc eit may even be because the engine parts arent bedded yet?

[ncrn]

well how are you riding, have you fully run your engine in yet?

if you have run in the engine, the only way your gonna establish your top speed is to ride up to the red line, change gear, go to the red line, change gear, keep doing that till your in top, and you should be at the bikes fastest speed.

However don't do that unless you've run the engine in.
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[tristan]

[nick606]

yes and your bike doesnt sound derestricted.

from what i have heard they ask you whether you want it derestricting at you first service, which is 500miles if i am correct.

[tristan]

[ncrn]

what revs is your red line at?
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[tristan]

[ncrn]

and your riding at 7000 at the highest? That will massively effect your top speed. Trust me on this, 2 strokes only perform well when being revved very hard. Especially the 50ccs, wait till you have reached the end of your running in period and you will fly. I know its a pain, I had to run in my nsr and it took forever just going round at 50-55 top speed, changing gear every 4 seconds, I hated it.. but was worth it now the bike seriously flies.
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[tristan]

[tristan]

[ncrn]

yeh it really does make a difference

when I was running in my bike I could do 6000rpm at max at first, this meant I had a top speed of 55mph roughly.

Now its fully run in I can go up to 11,000rpm and I can do 90mph, it would be over 100mph if I hadn't down geared it.. but I like the acceleration too much
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[tristan]

ok well do you mean yours had a restricter or you didnt go over 6000 to be within the guidelines? btw in case you didnt know, my bike can go over 7000 lol i accidently revved to 10,000 when changing gear once, so it is fully derezzed atm, so hopefully the speed will increase here too.

[ncrn]

it would go over 6000, I did a few times when running it in, it helps the piston rings to settle in a bit to occasionally give it some heavy revs.

Its a pain having to run it in, my only advice is to go out and ride lots and lots to get past those miles
____________________
Past: 55 Sym Jet, 91 ZZR250, 03 NSR125R. Present: 97 ER-5.
https://www.nsr125.co.uk - NSR Owners forum.

[mattgirv]

I also find 2 strokes seem to perform better when you don't keep a stable throttle position, as in I believe cruising along all the time at 7,000rpm will not be any good for the engine. Up and down/slower and faster instead.

[tristan]