Piaggio Zip Malossi 70cc Cylinder Kit Install & Tuning - Scooter Street 

Thanks MrWhiteamin, appreciate the kind words mate👏 The Zip is an amazing little scooter, heaps of fun for street riding.

62 and still love building fast 2 stroke scooters

Thanks for your appreciation👏😊

My fav part is they aren’t using torque specs, I never been a fan of them 😂 always though who cares if it’s for my scooter

Thanks Brett🙌 awesome comment!

Amazing to receive such a complimentary comment, thank you Charles. All the very best for you too👍🦘🦘

Thanks Salttoo.

Go for it! Test and learn, can't go wrong. Be warned, once you start it is hard to stop tuning.

Really good to hear this. We struggled for many years trying to pioneer solutions to the many problems these little scooties present.

Thanks for your support! All the best.

What a beautiful comment! Thank you Giuseppe Bonaviri. We love Italian Scooters in Australia🛵

@@scooterstreetau this is one more reason for me to come there 😁

Paul, thanks for the support :) More Vids in the pipeline.

Does this kit change your auto transmission to manual?

So cool, thanks Gt 6. Glad it helped🙌

Thank you for supporting our Channel, Glad you enjoyed it😁

Thanks for your support Markas, we try to keep the videos coming.

Thank you, really appreciate your experience... keeping it in does give better fuel consumption👍

Thank you👍

Thank you🙌

Yes it was in new condition and all original. Very rare indeed.

you havent been to the Netherlands yet haha. Pure machines here

@@StanGlasius well hahah i live in the netherlands😂 and yess we do have some but not like this one. We do have very tuned ones indeed

@@Pp-sf6ws ja dat dus hahaha gekke 180 zippies vliegen voorbij

@@StanGlasius exact😂 vind het ziek. Maar ook wel jammer.. mis die full 70cc zippies ook wel

Nice work. Haha yes the steering is lost when riding the Zip. Set the seat on the lowest position and hang on..

Pipe? Exhaust right? Not familair with how they name the parts in english.

@@emirhan030 yes, the same meaning👍

Thank you👌

Good story Johan, 15 years ago only Scooter tuners would have known of these parts😜. The first time someone asked me if I had any Polini stuff I pointed towards the fruitshop down the road.😂

You probably noticed apart from the water cooling system on the SR50R, the base of the 2 engines are the same. You will notice between the Piaggio/Aprilia 2T models they look the same but each model has a different transmission length to accommodate the rear wheel, this includes each model running a different belt size to connect variator to the rear pulley.

I believe 2019 SR50R has the new Euro 4 emissions system also, which uses a different carburettor, stator, coil and CDI/ECU. It also has the larger temp sensor on the head, and the solenoid air valve for the electronic control of the carb.

@@scooterstreetauwith the length difference would it be worth sourcing the longer transmission to help with wheel lift?

Yes if that is the goal.@@jaredpursey3791

In this video, if you follow what we have done you will end up with a very fun, fast little street machine. The build in the video was based on s tight budget so we did not go overboard with super expensive parts. Just a strong foundation which delivers good power and overall value for the ride.

@@scooterstreetau i have a problem where i splited the engine case and changed the piston and crankshaft but now the case wont fit? The case wont close fully i think the case is touching the crank bearings I have a doppler endurance crankshaft.

@@mosebootyclap160 Make sure the Crank shaft is pressed all the way into the cases.

Thanks Levi, glad you enjoyed.

Thank you for the great comment and for the view👋🌟👌

@@scooterstreetau no problem at all. I just got a zip and have purchased a few products from you. I hope I got the right ones. Just going to do the rollers, jets, clutch springs. Got a Leo Vince off a friend too. Was going to hold off on the 70cc kit for now to save some money. Hopefully it all goes well.

@@generalr6398 Ok thank you, use the vid above as a guide..

Gday mate and welcome, Great comment thank you! See you're never alone😁😂.In Aus we do not have these rules, the country only adopted emissions rules 12 months ago.🦘 Wow and the Cops remove the parts? Hard core.. Over here no such thing, only speed and Hooning laws. All the best🛵🛵

Worked out very nice for the owner, thanks for the love😉

Thanks so much for the comment, all the best👍

All for the love of scooters😉

Awesome, great to hear..

Thank you! That Zip of your would be very satisfying..wow.

@@scooterstreetau yes in deed my friend 👍 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TLWu62PJ-eA.html

Thank you Air Man🦘👍🦘

Haha yes sorry. Thanks for the support ☺

0.7, very good👌 and thank you.

Please support us and SUB..'

Haha the good Ole days.. yes fit more , get more agreed. The Runner would have been mad with those speeds. Thank you for the Sub.

Where is the serial VIN?

In the glove box.

Good choice! Great place to start, 😍 ZIP

Thank you, you have great video too👍

@@scooterstreetau Thank you so much brother! cheers!

@@scooterstreetau Thank you so much! Godpseed

@@2TLifesTV 👌

@@2TLifesTV 🎅

Thank you, and yes we are aware of the Zip race series. Are the race Zips the SP water cooled version? This one is air cooled base model version.

@@scooterstreetau Absolutely correct, the SP is the water cooled one, but to the best of my knowledge it should be possible to convert any version to liquid cooling: the only hiccup would be with the clearances in the leg shield trim, as there's a storage compartment that would interfere with the radiator's positioning. For the sake of honesty though, I'm not going to vouch about the accuracy of the info, it's something I recall from when the SPs where just hitting the market in Italy some 10+ years ago

@@LucaFiltroMan We have done this conversion. We took an air cooled Zip and fitted the Radiator with electric water pump, cooling hoses and the water cooled racing cylinder along with many other tuning parts. We also changed the front panel and fitted a genuine SP front cover so the incoming air could meet the radiator. The performance was as you described, Ridiculous power!! This was an expensive project... We lalso did the Superman theme custom paint job and it did fly🤣🤣.

Thank you so much! The extra parts youn are fitting will be on another level. Yes please go ahead and link the forum. We are trying to get more SUBS and views, much appreciated.

Glad you like our videos, thank you for watching and your comment. The small 2 stroke are too much fun, it feels illegal😂

Hey thanks henryhaxby, see the description for the tuning points. we start with needle clip in middle position and we leaft it in this position.

Thanks Beau😲👍, glad you liked it.

Thanks! Glad you enjoyed🙌

Great stuff, very happy for you😆. Note: The lighter rollers will allow the engien to rev easier but go too light and you will loose pulling power through the mid range. Fitting a clutch or fitting tighter clutch springs will make a positive difference to the rpm build and the initial acceleration.

@@scooterstreetau im so happy for your existence and that you made this video 💯❤️ you helped a man on the other side of the world literally 🙏🙏🙏 Ill put in the clutch tomorrow and i will order some new clutch springs and some contrast spring? I thinks its called 👍 anyway big big big love 💯❤️ If you were in Sweden i would fuggin hug the shit out of you brother ❤️❤️ keep doing this kinds of video and i would love to see some more build from you guys 🤔 sorry for long comment but you really saved me, my man 💯💯💯🙏🙏🙏🙏😇😇😇

😂😂That is awesome, the reason we make this channel and you are a perfect example🙌, We have great success with the polini clutch, it is adjustable and aloows fine tenson adjustment.@@alexliljegren6771

@@scooterstreetau i only need to build hangers for all of my pipes to try out now, stage 6 mk1 , laser x pro and a gianelli reverse. De build hangers take longer time then anything else 🤣 But yeah! If anybody reads this! Go for it! This video is a very very very good tutorial on how to do stuff! Only thing is that im lefthanded and assume the guy in the video is right handed bcuz of sometime when he said do from this side cuz easier angle, sometime is opposite if you are left and its possible from the other side, just a side note 😅🙏 Thank my brother from AU 💯❤️

I have the stage 6 pipe on. I have 70cc malossi sport i have malossi fly clutch and 6g rollers. What is the final steps now to get it adjusted right?

Thanks Dom, appreciated🤙

If the MHR is in very good condition, value hard to pass on that.. if a first build go for cast.

Much appreciation👌

Glad it helped and appraciate the veiw and comments🙌 The Roma is Minarelli based (Yamaha) so look for these parts. There are many around.

Thank you mate👍. If you derestrict the carb only there will be no noticeable gain, due to the balance being over weighted with air. In effect you are giving too little fuel. We want an increase but a balanced ratio of fuel and air. Thanks for the SUB🎅😎

The main jets 88 in the end, skip the video to 52:00 for a run down. After 2 weeks we followed up with a systems check, we finished the carby with an 85 main JET, Needle is an A22 Middle notch.] For the WD40 question, 4 stroke system is different, the 2 stroke system has oil and fuel in combustion so it might be best to run with oil...

Ah thank you mate, support is appreciated🤘

Hi, and thank you. Yes the Vespa 2 stroke and the Zip 2 stroke are the same engine..👍

Well done! and a great achievement to have a go, I am sure it will be a success. With the basics, only ever change one part at a time, cylinder first then a quick start, then start the jetting. Start at your 96 and then move down to the 92-90-88 and when it becomes clean on throttle go back up 1 jet and ride it for a fuel tank and then retune. Yes you will notice the revs and movement may not be at their peak so leave the rollers and just add tighter clutch springs or the Mal clutch. and then again test ride and let it settle, adjust as necessary. Then repat with the next part and so on🚀

Always trying. Time is our Kryptonite.

Wow, thats a very tight squish! The Malossi MHR Team racing cylinder reccommends no more than 0.7mm squish. Thanks, glad you liked it!

70cc ac athena racine kit for my zip

Both rings are the same, so the position can be top or bottom. Read the instructions if unsure.

Yes the early Zip was PURE. Thanks for watching🙌

Tahnk you👍Yes.

Hi Jay, Thank you👍 Always a good idea to have the scoot running well first. If there are any issues, correct them before proceeding. Is the Leo derestricted? Is the engine spluttering or does it slowly loose power? Move the needle to the middle notch, Try the 60 Main jet. Report back👍

They would have been a huge seller in USA.. Very popular in all markets.

In our experiences, if we did not make the change to the main jet the engine would sustain damage due to overheating, lean on the fuel mixture. It is always hard to comment on others work so ultimately best to check with the installer of the parts, they may have upgraded the jet or had a suitable reason not too.

Thanks mate. We use the spark plug ZMR7AP or you can use a CPR8E. You should change them often.

Hey Alixglow, whatever works for you and what your riding style is, so go for it. Good to hear your comments. We would apply a stiffer clutch spring set to delay the engagement of the clutch. Some of the race brands have designed a HIT clutch which allows the rev to build and then the clutch will engage to boost the initial acceleration. If you have less tension on the clutch springs the clutch will be engaging at idle, have seen this many times before.

Thank you Joe🙌 Let the engine warm up to operating temp before making a judgement on the tuning. Is it auto choke or manual choke?

Better to be late than never, thanks watching🙌 and thanks for the tip! We discussed this in the piston replaement videos.

crankshaft RMS

Yes you can do it.. Thank you for supporting us👏

Thank you very much🙌. Approximates.. Pipe $300, Clutch $130, Rollers $30. Check out the TGB page on the Website. www.scooterstreet.com.au/product-category/others-50cc/tgb-50/

Hi Ashley, Thank you. Yes you should buy the 125cc or higher. It is expensive to upgrade the 4 stroke engine and the end result is not as good as the 125cc.

Not needed to adjust at this level, the pilot and main give a crisp carburation when throttled.. Needle or needle position.

@@scooterstreetau Perfect, thanks!

@@krazed0451 🤙🤙

What carby and jet are you running, is the oil pump working properly, so many questions??

It would be somewhere between 80 and 90. You need to get a range of jet sizes (jet kit), start at around a 90, test ride, reduce to the next size down, repeat until the bike runs cleanly. Taking a shot in the dark on a jet size is very commonly the cause of piston seizure.

Yes we do, otherwise you will not optimise the potential power of the exhaust.

Much appreciated🙌

Thanks EnergyXyx, this is great information🙌. There are more than 11 PHVA in 17.5mm range. Parts change between them such as the slides, needles, atomisers, jets and so on. Heaps of info on Dellorto Uk website for anyone needing.

@@scooterstreetau yes there are so many models, but just stay away from the bad Euro4 - OD models. The good ones often comes with A20 needle and a 40 degree cutaway throttle slide.

Thanks for sharing🙏@@EnergyXyz

Nice! This scooter is still going well after 4 months.

Hi Nate, So this question relates to the Zuma engine video, and also includes any Malossi Variator kits that come with a black metal spacing washer. The Malossi kit 51 7075 has 2 washers and for the Zuma fitment the 2mm washer MUST be fitted to set the correct spacing for the variator assembly on the crankshaft. In the above video which is using Piaggio engine you can see the spacing washer on the crankshaft at time position 9:35

Hi There, Yes we do have the Italjet Dragster in Aus, we have 4 customers with this machine. With the upgrade, Go for it bang it up and burn🏍🏍🏍

@@scooterstreetau great stuff! One of my all time favourite scooters! It's been off the road since 2007 as parenthood and mortgages have stopped play for that long but I think I will have to do it soon! I have only just finished restoration on a italjet formula too!

@@charlieboy259 Great, yes very rare over here, 3 of the 4 we service are modified and really have plenty of power and such a unique style.

@@scooterstreetau cool stuff! keep up the great work guys!

@@charlieboy259 Thanks CB.✌🦘🦘🦘

Hey Bro🙌

You can buy the change over LED globes and they run from the same connections as the existing globe housing, very clever.

Nice to hear👍👍

It works very well for us👍 but you must adjust the carby tuning.

If we get the opportunity to for sure!

We used the Blue springs for the clutch, this is the set provided with the Leo Vince exhaust. You can also use Malossi spring set, White or Yellow. Malossi Rollers 19 x 15.5 6.5 gram.

Thanks FTD, we rode tested it at 88KPH but it had more, the original plan was to increase the acceleration and mid range for street riding only and not a build for top speed..

FTD please sub to us. this helps our channel👌

In this video we installed the blue leo vince springs on this particular bike. The TT and Malossi Sport cylinder make a fair bit of torque down quite low in the rev range so the springs didn't need to be drastically increased. On your bike with the parts you've mentioned, I would aim for around the 6k rpm engagement. The MHR Rep is a great street cylinder because it offers a fair bit more performance than the Sport kit - but in a much lower rev range than a race kit. Its making really good torque around the 6k rpm, much more than that will more than likely lead to clutch glazing and then slipping. You'd really only go for more than 7k rpm engagement on a bridge port race kit which needs big rpm to make power. We often preference the Polini G3, the adjustability is quite user friendly, but the Delta is also a great clutch.

Use yellow or white springs. And a white contra spring. Avoid red springs they're only decent for a race clutch with the 94cc malossi kit.

@@JDMz We've found the yellow Malossi springs to be ideal with most basic 70cc cylinder kits and exhausts, the white can often be a little too close to factory. Factory or white contra is great with a basic 70cc build for sure.

Thanks CC, Look for a local supplier, you will get support and spares this way. Or try any of the European suppliers. Germany or UK.

Readspeed scooters will have parts for typhoon. They're based in the UK (stourport on severn) my local.

Hi, You can find all the parts here --- www.scooterstreet.com.au/product-category/piaggio/piaggio-zip-50/ We used the Leo Vince clutch springs. Malossi have the Yellow springs. Original Torque spring.

Hi Callum, what a great message, thanks buddy👋👍. With the Yasuni R you should have already: Upgraded the jet size, adjusted the rollers and added clutch spring set. You Should remove your current jet and heck the sizes to get up to speed with the size lingo. The Zip has 6mm jet with a size of 53. You should start with a jet size of 62 and move from there.. it is important to do the other small parts I have mentioned..

@@scooterstreetau thanks for the speedy response guys, haven’t fitted any parts just yet I just wanted to make sure I got everything together first before we tackle the job. Thanks for your advice guys I’ll start with the 6mm 62 jet

@@callum14p Great plan👍

Hi there, back again we finally fitted the parts to the scooter. Malossi variator with 7.5Gram rollers and added yellow clutch springs as well as the yasuni exhaust. Fitted a new carb as well as the other one had been abused and the thread on the main jet had been stripped. Took it for a ride out yesterday and acceleration was weak and top speed to 60 kph. Also main jet size is around a 65 jet according to the box on the new carby. Hope you could shed some light on how I can fix the slow issues. Appreciate your knowledge

We have several other videos that give an explanation of the variator tuning, check them out. VARIATOR: With everything set at factory as a good starting point, go back to your original rollers, if they are 7.5 grams we have a total of 6 rollers weighing 45 grams total. So we want to lighten the rollers by 1 gram each, let's try the 6.5 grams (total of 39 grams). Marking the variator face prior to closing the clutch cover (which we can check the belt travel after the testing). Now test ride and note the difference. Just repeat this step and reduce the amount of weight change, by this I mean try a .5 gram change or even a .25 gram change for each roller. Your looking for a higher RPM earlier and a continued PULL as the variator changes through the gears. CLUTCH: The clutch can be set using a higher tension clutch spring set. Many of the Manufacturers have a chart to guide you on the tension of the clutch springs with an RPM engagement chart. So just go for around 5000RPM. This will delay the initial movement as the clutch engages. Remember to revisit the roller weight so the RPM stays optimal and does not dive through the gear change. Patience is the key and also document the weight change and the resulted changes you experienced and the test rides. Hope this helps and thanks for supporting our Channel.👍

@@scooterstreetau thank you very much for the detailed answer. Will look into this.

@@scooterstreetau Just finished fiddling with it, thanks guys it runs very good now. Putting a rpm gauge on it for testing has helped massively too. Peak power seems to be around 7500 rpm, with 5.0g rollers and stiffer contra / clutch springs ( polini 3g clutch with green springs on almost full preload and polini evo contra 10% ) it takes off much better and runs at about 7300/7400 rpm in normal city speeds. One question though, i think that the torque driver starts shifting slightly before the clutch grabs. Should i try fitting an even stiffer contra spring to make it shift later? Thanks again, very much appreciated and all the best from Germany

@@hermmie17 the Driver will only shift if the belt pulls with pressure. Are the springs set too heavy? Are the rollers too light? Play with these parts one at a time to note the road difference..

Hi Callum, Thank you so much for the Coffee, so appreciative. What Yasuni? Z or R? Did you derestrict the exhaust? Move rollers to 5.5 gram. then move up or down in weight as required. 5.5 may be too light but you will know first ride. Let the carby warm up so it is not on choke. ride for 3 minutes then tune and judge. D you have a 70cc kit fitted?

@@scooterstreetau hey guys, it’s a Yasuni R that has been derestricted. Ok will try the rollers. Bike has always been running a few minutes before taking it out for a spin. It’s still a 50cc on the scooter for now. Thanks again

@@callum14p Ok, the Yas R needs very light rollers with a 50cc kit, give it a go and let us know 👍👍

The Carbon reed petals give a snappier response to the throttle action which enhances the engines rpm over the initial twist. The reed petals are provided in the Malossi sport kit for Piaggio. Some performance reed valves are larger and allow more fuel mix to flow.

Look into the ZIP SP water cooled engine. It would be these parts to adapt to your Vespa. A combination of Malossi and Genuine parts.

@@scooterstreetau fantastic, thank you!

@@technomama1 Big project but will be worth it👍

@@scooterstreetau I'm halfway of it, just noticed that while casing casting is exactly the same as the one for liquid cooling, the impeller shaft bearings seating is roughly shaped and not bored. I will fit an electric pump I think if they are reliable? And if the electric system would accept that.

@@technomama1 Yes the electric pump is the only option, you can find a variable speed pump that will be best.

Buy me a coffee and I'll help you out as much as I can.. See home page for the link.

The scooter was running before we started the upgrade process and the oil tank had sufficient oil level to complete the job.

See the Pinned comment > The main jets 88 in the end, skip the video to 52:00 for a run down. After 2 weeks we followed up with a systems check, we finished the carby with an 85 main JET, Needle is an A22 Middle notch. An A 21 needle makes a smooth throttle at the lower RPM😎

We don't have many of the Gilera Runner 180 in Australia😓

HI Ally, Each scooter is different and will require it's own jet size and roller weight. There will be a formula that works best for each individual scooter. Would be best for you to follow this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-kFr0nwXf448.html and this watch these to help give you an overall idea. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hUZ8eqIRFCk.html&ab_channel=ScooterStreet ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZANXyeNGPsk.html&ab_channel=ScooterStreet ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2XRQ-5nqKlg.html&ab_channel=ScooterStreet Hope this helps.

You need to make sure you order the correct parts for the NRG. Some exhaust manufacturers make exhausts that fit all Hiper2 engines (Zip, Typhoon, NRG ect..) and some have specific fitments per model. For instance, Leo Vince make a specific exhaust for the NRG, which is slightly different to the Zip. The cylinder kits are obviously also quite different due to air cooled vs liquid cooled. Most of the parts in the engine are the same.

We'll try! Just depends on when we get a job in the shop to film us doing.

It depends on what model scooter you have, but generally not unless you install a racing cylinder kit. If yours is a Piaggio engine like this, the factory crank is very strong.