Derbi-forum.nl

Hey guys, sorry about the English language. I'm from Denmark so I don't know dutch, but I do know you guys are the best at moped tuning.

I was wondering what exhaust is the fastest og has most acceleration? I've heard it's SCR Corse Chrome, but I'd like to confirm it.
I have an Aprilia SX 50 original setup, but with all the restrictions removed.

Thanks.

Google translate:
Hey guys, het spijt me van de Engels taal. Ik kom uit Denemarken, dus ik weet het niet nederlands, maar ik weet wel dat jullie de beste op brommer tuning.

Ik vroeg me af wat uitlaat is de snelste og heeft de meeste versnelling? Ik heb gehoord dat het SCR Corse Chrome, maar ik zou graag om het te bevestigen.
Ik heb een Aprilia SX 50 originele setup, maar met alle beperkingen verwijderd.

Thanks.

Hey there, welcome to the forum.

We dont mind your English at all, I have the cross version of this exhaust.
since you have an all stock aprilia, this exhaust in combination with the right sprockets 13 front 53 rear would perform really well.
I geared mine 14/53 so that i have a higher top speed but a slightly lower acceleration, my bike is all stock too all restrictions removed aswel.
i hope i answered some questions

THe SCR Corse Chrome is indeed one of the fastest exhausts for a stock derestricted Derbi engine. But it wil only have good acceleration in the higher Rpm's. But if you don't mind that, it's a good choice.

Thanks for the replies

My sprockets are 14-53 too, what is your topspeed with the cross edition?

105-110km/h depending on the direction of the wind, but in the 5th to 6th gear it takes ages to reach those speeds
however your exhaust would reach those speeds a little bit faster, correct me if im wrong guys.

I hope you'll stay on the forum and open up a gallery to show your bike to others, it doesnt matter if it is in English.
honestly i prefer 13-53, but it'll be all your choice.

Sure I'll stay active, and I'll create a gallery as soon as I've made a few changes.

This is my bike 3 months ago:


Anyway, thanks again. 105-110km/h is pretty fair speed.

Awesome colour combination, you should paint the brake disk also green

Planning on painting half of the rims. That'll be enough green I think

Both SCR Corse and Gianelli Conti are fun exhausts, both have their powerband in high RPM's.

Yasun Cross ML

You sure that's faster than SCR Corse SM Chrome?

The best exhaust for a 50cc engine is a custom made exaust, but the scr corse hm is a little faster on a 50cc bike

That's one hell of a bike, i like the colors.
you can make it look like a kawasaki, if that is your sort of thing.
105 to 110 is more than enough, anyways what are the regulations about mopeds in your country?

Max speed for a 50cc moped = 30 km/h Also, we have to drive in the bicycle path.
And if you get caught the second time, riding an illigal moped, they confiscate and destroy it. The Danish rules are so fucked up.

I have a 'clean-slate', but I gotta be able to get away from the cops. That's why I'm thinking about another exhaust.

basserd schreef:The best exhaust for a 50cc engine is a custom made exaust, but the scr corse hm is a little faster on a 50cc bike

Er zijn zoveel verschillende uitlaten ontworpen voor de standaard cilinder, dat je er met een op maat gemaakte echt niet zoveel erop vooruit gaat. Om de perfecte uitlaat te krijgen moet je immers ook uren lang testen en dat hebben fabrikanten al lang gedaan.

I'm from denmark lived there for 10 years but i cant spell denish enymore but i can wtill speak danish haha

The best exhaust i ever had was defenetly gianelli conti

Defcon schreef:Max speed for a 50cc moped = 30 km/h Also, we have to drive in the bicycle path.
And if you get caught the second time, riding an illigal moped, they confiscate and destroy it. The Danish rules are so fucked up.

I have a 'clean-slate', but I gotta be able to get away from the cops. That's why I'm thinking about another exhaust.

Wow,and i thought we had strict rules over here in the netherlands:
Max speed 45-50km/h
55 to 65 = €45,00 fine
67 to XXX = 1 point on your moped license, when you get the 3rd, they'll confiscate and destroy your moped. And huge fines, €80-200.
i tried to get away from a police car once, scr corse, 50cc original cylinder, 14/53 gearing, it worked but the officer read my license plate and waited for me at home
just get a electronic rev limiter and don't run from the cops, you'll not only endanger yourself but also pedestrians and other road users.

how is it even possible to drive 30km/h with 6 gears, they must be retarderd in your country for making up such a rule.
No offence though

They limit it to 3 gears from the factory. You just have to put in another gear sprocket to make it 6 gears. Did you drive with unlimited CDI and what was your top speed?

And I don't think it's possible to rev limit it that much.

Defcon schreef:They limit it to 3 gears from the factory. You just have to put in another gear sprocket to make it 6 gears. Did you drive with unlimited CDI and what was your top speed?

And I don't think it's possible to rev limit it that much.

''they'' limited it to 3 gear when they come out the factory? don't think so, an original Senda out the factory has a gearbox with 6.
Also never heard about a ''unlimited CDI'' for Senda.

When they import it to Denmark, they put this limited gear drum in:
http://i7.minus.com/jRiHXAsWd9ZGq.jpg" onclick="window.open(this.href);return false;

Compared to the original one:
http://i7.minus.com/jesiJ6JPfBMAr.jpg" onclick="window.open(this.href);return false;

Notice one the missing sprocket stick. No matter if you have the 3-gear one, there will still be 6 gears in it. You just have to change to the 6-gear gear drum to unlock them.

And I'm pretty sure the CDI is limited so it can't take maximum RPMs. Just look here:
http://www.ebay.co.uk/itm/New-de-restri ... 0839314625" onclick="window.open(this.href);return false;