now i know that a 4 stroke 50cc doesnt pack a lot of grunt...but i was wondering given some of the discussions made about some other 50cc scoots (mainly 2 stroke ones) ...what difference would derestricting (if that is possible at all) make to a piaggio zip 50 cc scoot. I like these little scoots...and sound great for around /inside city limits....but can more performance be dragged out of or put into these scoots? might be thinking of getting a runaround scoot - and prefer a 4 stroke to a 2 stroke...but just want to pimp it up as good as can make it. look forward to any info/advice...ta, scootmama
How To Derestrict A Piaggio Zip 50 4t
I de-restricted my 4 stroke 50cc today and saw a jump in speed from 45kmph (the restricted speed) to speeds exceeding 60kmph. It's not a piaggio brand scooter, so I can't speak for how de-restricting will affect that particular model, but on mine I now have no fear of taking up my whole lane confident I can keep pace with traffic. I have found that you can compensate somewhat for the slower "take off" speed on a four stroke by throttling a little whilst holding your rear brake, then when the lights change you zip away quite nicely.
Do you know what performence exhaust I would need for my 4-stroke piaggio zip, I know that a performence exhaust wont do much to the speed or power but I purley wont to replace the crappy one ive already got on it to give it a customized look. THANKS
Plug & play assembly, simply remove the old parts and install the new ones. Your Piaggio / Vespa scooter is now derestricted, have fun!Note: The CVT cover has two safety screws that you must also remove and replace with those included in the kit.
Derestricting a Euro4 Piaggio 50cc 2-Stroke ScooterThis blog details how to derestrict the newer Euro4 versions of the Piaggio 50cc 2-stroke scooters, additionally allowing further tuning possibilities.We have used a Piaggio Typhoon 50cc 2-stroke scooter for this blog, but the principle can be equally applied to other Euro 4 Piaggio engineed scooters such as Piaggio NRG Power, Aprilia SR50R and SR Motard, which are restricted in a similar fashion.
This comes at a cost though, a lean mixture can cause the piston to run hot... the piston can subsequently over-expand and can seize inside the cylinder in which it is suddenly too big to move up and down within. This is an especially high risk with tuned engines that run lean. The bikes CDI/ECU unit tries to mitigate this risk by only activating the air solenoid at appropriate times and this model of Piaggio has the addition of a cylinder head temperature sensor which, when the cylinder head temperature gets too high de-activates the solenoid which closes the air-circuit to richen the fuel mixture and bring the cylinder temperature back down. This is satisfactory on our standard restricted Piaggio Typhoon, but the risk of seizure becomes high when you start to derestrict or modify it and it needs to be removed or disabled if you are planning on doing any tuning work.
Step 1: Removing the air addition circuit.This new air circuit makes the bike run too lean when derestricted; in order to properly derestrict or even begin to tune the scooter we need to remove this system.There are a couple of options to disable the system:
The next restriction that needs to be removed is in the variator. Previously Piaggio fitted a removeable ring which could simply be removed from the variator bush but now this is incorporated as part of the bush. The restrictor ring or (restricted bush) works by blocking the variator in the scooters transmission from fully moving out, preventing the scooter from ever getting into its top gear ratio, (this is like removing 4th and 5th gear on a car). When the variator can no longer change gear ratio the only way for the road speed to increase is for the engine speed to increase. Removing the restrictor allows for higher top speeds without the engine over-revving. Consequently it is much safer for the engine to run at 30mph when derestricted rather than 30mph when restricted because the engine will be running at lower revs as it was originally designed to do so!
Once we have removed the additional air system and variator restrictor we are 'derestricted', the scooter will now go significantly over 40mph comfortably. At this point we are now free to explore further tuning options like fitting a sports exhaust.
Step 3: Fitting a power pipe.Now we have derestricted the Typhoon we are able to exploit power pipes (sports exhausts) and other tuning options. To complete our Typhoon we fitted a Leo Vince TT . A Leo Vince TT is a basic budget sports pipe which will almost double the hp compared to the standard Piaggio exhaust. When fitting a powerpipe it is necessary to rejet (increase the size of the main jet in the carb) and also to fit lighter rollers to enable the variator to operate at slightly higher rpm than standard. The Leo Vince TT exhaust typically requires rollers approx 1.5 grams lighter than the standard ones, our Typhoon showed the best results on the dyno with 4.8 gram rollers fitted which is typical for Piaggio 50cc with a sports pipe and standard cylinder kit .Historically a Piaggio 50cc engine previous to these Euro 4 ones with a sports pipe fitted when run on our dyno will nearly always jet perfectly with a 68 jet fitted. Out of 100 dyno runs, 98 of them will end up with a size 68 jet.
Over the next days/weeks I will explain the basics of scooter tuning, starting with simple improvements like derestrict a 50cc scooter and later going deeper into engine tuning concepts like flowing or changing the engine timings. Along with that I will also explain which parts should be installed first when starting tuning a scooter and which ones need to be replaced when getting more serious. Welcome to Part 1: How to derestrict a 50cc scooter.
These restrictions are usually provided by third parties which means it is not a restriction applied by the manufacturer of the scooter but a kit bought from a company that specialises in restricting scooters to comply with local drivers license laws. The kit mostly contains of an electronically limited CDI and some other parts (removal of the pillion seat, cylinder head spacer to decrease compression, etc). These restrictions are not stock and therefore need to be installed by the vendor of the scooter. This also means that all installed and replaced parts are yours. When buying an already restricted scooter make sure to receive all the parts needed to derestrict the scooter again.
Please note: It is not possible to derestrict the CDI by yourself. Please do not cut any wires or try opening the CDI. All that happens will be, that you simply break it. Just purchase an unrestricted one for 50Euros and everything will be ok!
In most cases derestricting the scooter not only improves the performance of the engine it also allows it to perform better, longer. This is due to some restricting parts not allowing the engine to perform as it is was designed to. E.g. the variomatic ring grinds into the aluminium of the variomatic over time causing it to break, or the exhaust restrictions increasing the overall of the engine temperature by blocking the gas flow.
This depends on the vendor and manufacturer of your scooter. Piaggio for example gives full warranty when derestricting the scooter through a certified vendor/repair shop. For other brands this might not be the case. Best get in touch with your manufacturer or your local scooter shop and ask them if derestricting your engine has an affect on your warranty.
Piaggio engines usually have the dummy pipe and the variator ring applied. The airbox is relatively small and can be tuned but it is not necessary if you keep your engine stock and just want to derestrict it!
Hi Theodor, Sorry for the late reply. A derestricted CDI is not a problem at all. The only thing that happens is that it allows to rev the engine higher. Thus your top speed will increase. No risk for engine damage or anything! Best, Daniel
Hi i want to derestrict my 2 stroke 50cc scooter it is a Honda Hero Winner. I cant find much on this scooter so i know nothing about it. The fastest it will go is about 58km/h and if im lucky 60km/h. i dont have any money to use to upgrade it or buy parts otherwise i would buy a new one that goes faster. Can you please help me with tips on making it go faster? I just cause traffic everywhere i go and in South Africa that is not a good thing. Thanks
Anyone have a 2014 Piaggio Fly 50 4T that is derestricted? Mine has a top speed of 35mph/56kph. I ride around the University of Florida and would like just a little more acceleration and speed. 40mph would be great! I believe that I have a restricted CDI. Any idea what the top speed would be with a un-restricted CDI? Are there other easy mods that would give me the same results?
Hey i have a Dongfang 50cc SST (DF50SST), Its restricted and only goes a max of 31 mph after 15sec of full throttle. And after some research i thought a derestricted cdi would help so i bought one, installed, and no change. What other ways do Chinese manufactures do to restrict RPM and performace. Thanks in advance.
Derestriction kit suitable for Vespa Primavera, Vespa Sprint 50 Euro4.The derestriction kit comes with an ECU that is recognised by the Piaggio tester. After derestriction kit installation the top speed is about 65km/h. Using the Naraku variator NK901.27 or any other sports variator acceleration and top speed can be boosted even more (tuning/adjustment required). The derestriction kit includes: 2ff7e9595c
Comments