?hi , i have a pulse scout, i found and removed a restriction using a dremmel pencil grinder, it was located in the throttle twist grip housing ,was a thin barrier part of the ally casting that simply stopped the twist grip from fully rotating by catching on a nylon lug on the twist grip!! wedding ?) Most stock exhaust feature a dummy pipe on the exhaust manifold whereas restricted after market exhausts have a little diameter restriction welded into the down pipe.In order to remove the dummy pipe simply cut off the pipe with a handsaw or a micro grinder.

Those usually come with a variator ring, and a deadpipe on the exhaust.hi Daniel, the air cleaner has been cleaned I have not changed the jetting at all its the same as when it left the factory ( if I have to change the main jet do I go bigger or smaller ? ) It can be removed when disassembling the silencer.The variomatic ring restriction prevents the engine transmission from reaching its maximum gear ratio, thus limiting the top speed of the engine. Let us know in the comments or the forum and I will answer for sure!We use cookies to ensure that we give you the best experience on our website. Anyway the engine still bogs down after the initial acceleration, in fact it has the opposite of the very sharp 2 stroke acceleration I was used to with my previous ’96 Piaggio. If it can go faster, it becomes a scooter and in most places is then classified as a motorcycle.

The CDI (In most cases derestricting the scooter not only improves the performance of the engine it also allows it to perform better, longer. Whats the jetting like? Time to go on the hunt!4. And after some research i thought a derestricted cdi would help so i bought one, installed, and no change. And how fast are they A lot of 50cc bikes have their engines restricted at 30mph (48kph). they all look the same!Listen, thanks man anyway.

Though i didn’t think to check if the idle had settled at the time, regardless the problem is still there…Please forgive my naivety in the next sentence, it’s just the way i was brought up, I’m in no way racist but…how DO you tell a chink bike from a jap?
Not sure I how to increase the performance of this type of engine , been looking at all of performance heads and cylinders, carburetors, transmissions, etc. These are bolt on solutions and cost only about 20-30Euros.The diameter restriction is often found on street legal after market exhausts (Stage6 Replica, Yasuni Z, LeoVince, Tecnigas, etc.). Derestricting a scooter makes it faster and therefore more dangerous to ride. I would go with 1. and buy an unrestricted CDI. Is it going faster downhill?Sorry was mistake in cdi code, I have ordered cdi ducati 639978. Would love to get more and more tips from you!Have a look at our articles section. Sure, I can reach 60kph now, but getting to 40kph is a pain. so it wont join as the holes for the bolts need to be moved round? By good I mean these can be removed easily without spending a single penny (given the right tools). The Speedfight’s top speed is just over 40mph (65kph).This Japanese scooter was first made in 1989. Otherwise the carburator can not work at its maximum performance.It is a bit of an open story if air filter restrictions are really applied. On top of that, it is worth pointing out that these vehicles do not require users to have a motorcycle license. There are some bigger engine scooters with restrictions but it is very untypical for them to be restricted.Piaggio engines usually have the dummy pipe and the variator ring applied. It costs only a few bucks and will save you a lot of trouble.Once the variomatic nut is removed simply take out the ring that is sitting in between the two pulleys.


These are the good restrictions. A limiter within the carburator blocks the movement of the slider. Also, this is only valid for the 50cc models. I meant pointless. at 12mm the mainjet should be 55 or 60!Hi ,daniel ,I have a yamaha neos yn50 2 stroke,I have put a q-tre sports exhaust on will I have to put a different jet size on carb the one I have on is size 60.size 60 should be ok. Maybe size 65… check the spark plug! This is due to some restricting parts not allowing the engine to perform as it is was designed to. Always ride within your limits and be aware that you might need a different drivers license when a scooter exceeds a certain speed or engine capacity. I want more acceleration…I weigh about 185lbs… Can you please give me your thoughts. All that is needed is a little grinder (ideally Dremel, Proxxon, or other micro grinders). Examples for these are variomatic rings, exhaust dummy pipes and carburetor opening restrictions.Restrictions through replaced parts on the other hand can’t be simply removed. Launched in the year 2000, this 50cc French scooter has a two-stroke engine. The carb restriction is a big piece of plastic that prevents the carb to open completely. E.g. I found some circuit diagrams of CDI’s on an image search and they seem pretty simple.

Also, would cdi box benefit me or no. In oder to stay within the limits but still have a well performing engine various restrictions are applied to the engine so the scooter can receive its road legal certification.The following restrictions can be found on pretty much every scooter sold nowadays and can be split into two categories:What’s meant by “added parts”? You can’t modify them yourself but they are fairly cheap (about 30-40 euros).You’re right it is difficult!

Your content should go viral.Does anyone know what restrictions there are on a Yamaha YN 50 E Neos ?Daniel, I have a new Italkit 70cc cylinder kit for a Aprilia Morini engine. !When i removed the vario’ to inspect the ring, with two lengths of bicycle chain linked together and attached round the center stand structure for leverage by the way, i immediately noticed that the ‘travel line’ of the belt was a poor 2/3rds of the way up the var’ and looked like it had never even been close to full potential.This lead me to the conclusion that the thing was restricted in some other manor, so before coming here i trawled the net and found info on carb jet cleaning, jet needle adjustment and air/fuel calibration among others.

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