Scooter transmission shimming

Scooter transmission fixes and explanations
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[@TheBigDirty716]

6 years later this video is still a huge help

[@michaelsap]

Great video! I for sure learned a few things that I had previously misunderstood. Thanks man.

[@Scooterswapshop]

thank you

[@thermoid1]

Now I know why I'm eating up belts at a ridiculous rate, thx for the video it helped me out big time

[@Scooterswapshop]

That’s great to hear Matt! Share the videos with your friends who could use the tips :)

[@pshivjee]

Well Explained. Very technical. Useful. Great 👍

[@nonchalantjt467]

Just solved the problem to my bike 💯 very appreciated

[@rickb3288]

I really appreciate you making these informative videos. I recently acquired two 2008 Zumas, with the plan to upgrade one. Via your videos, I have learned a lot, and will have a pretty good plan on how to perform upgrades in a cost-effective manner.

[@Scooterswapshop]

Glad to help make sure you get all your parts on scooterswapshop.com and make sure you subscribe it supports the channel!

[@eddieharwood5214]

Most of the stuff is cheap on Amazon 💁🏻‍♂️ I won’t pay that high crap 😂

[@bobbypace3669]

All the stuff on Amazon is also cheap shitty parts put in a fancy box you get what you pay for!!

[@SOLDGREEN]

@@Scooterswapshop The only confusion is why you’re such an idiot

[@edwingaytos6159]

Thanks iam learning.. Iam just new on scooter 2t. Watching from manila philippines

[@Scooterswapshop]

thanks!!!

[@BROKERICHGUYog]

ya i like the vids keep em coming.

[@Scooterswapshop]

thank you

[@botifigus]

........excellent. Thank you.

[@Scooterswapshop]

No thank you!

[@convictionmuzik7426]

Really I thought so but wasn't sure thanks I really appreciate it

[@Scooterswapshop]

cool

[@ninoechavez1402]

Thanks for this video man. Belt on my rear pulley used to be lying below the the edge but after i changed the oem drive face with a naraku highspeed drive face+0.7mm shim, i got the best takeoff, bogging was gone and belt now lies at the edge of the rear pulley. I can now climb up a steep hill from a stop with all power from my 70cc cylinder with ease. That's what I was wondering before with the 70cc kit and exhaust i have why i can't climb hills and just bogs.. Thankfully this solved the issue.

[@Scooterswapshop]

thank you

[@ginobrakel6602]

Thanks brother👌🏼

[@attilahoffmann4815]

thanks for sherin love man.

[@Scooterswapshop]

yes sir

[@ChengDIY]

Cool vids bro . Nice idea

[@Scooterswapshop]

Appreciate it

[@grantmara769]

Gonna get that flyface next really nice

[@Scooterswapshop]

sure

[@user-kp6ud7ht4z]

Techs/engineers like you are THE FUCKIN GOATS! Thanks breh!

[@Scooterswapshop]

thanks

[@musseb_2020]

Yes with need more videos like built n everything

[@Scooterswapshop]

have you been watching the last 2 years?

[@Christ-is-King-]

More videos! I’ll be calling you tomorrow!

[@Scooterswapshop]

ok

[@shannon5459]

Hey team, have you made a follow up to this video like you mentioned towards the end?

[@ramnathksheerabdhi4167]

Great explanation of the CVT system. Can you please make a video on "symptoms of belt slippage"

[@Scooterswapshop]

Belts don’t really slip unless there’s some type of grease etc on the cvt system. This is the case with most common scooters

[@Manwichman]

Huge help...I thought my belt was too short🤦

[@cyber5238]

Hey bro, awesome vid, really easy to understand, thank u and please make more vids so myself and other foreigners here, (thailand) can go fast like the locals do with the exact same bikes cause their bikes fly but they won't help foreigners to go as fast as their bikes do, very jealous people, and it's impossible to get what u want or get the performance parts needed from any shops even though most things needed r hanging on the walls but the Thai mechanics r either rude, stupid, jealous, don't know or don't want to help or even deal with foreigners, I have never messaged or followed anyone on u tube but i need help and hopefully u can help me with my bike, can u please keep showing us how to make the scooters faster, better, smoother and also can u talk about performance parts like, mad variators, pulleys, clutches and springs, full kits with all that's needed in the CVT, belts also engines, big bore kits as most bikes here r small 4 stroke 125cc and 150cc, I'm tired of paying and getting little to no extra power or performance, cant get what ii need, please help me, Thai's will do the minimum they can they just don't want to help and get go fast parts like all the local bikes have here, ii try to get the parts needed that can make the bike faster and mainly more FUN, thats what its all about, also suspension, front disk, braided lines, cause most small bikes here just have rear drum brakes, so how to make the front brake work the best possible way cause there is no help or even wanting to help foreiners here, even though i pay what they ask, i personally need to know about the 2015 Yamaha GT 125cc with the blucore engine but also small cc 4 stroke scooter engines, 125-and 150cc, that other friends of mine have and how to go as good as they can, if I could get the bike just to do power wheelies, it would leave a smile on my face everytime i ride my bike as they r the main source of transport here, I'm just so tired of the people here, they take ur money, but u get little to no results but their bikes fly and must b fully optioned but I have never seen a foreigners bike even half as fast as their bikes, mainly Thai kids with no money so they must have alot of little tricks for their bikes cause they can't buy anything to good with no money,, thank u for taking the time to read all of this👍

[@Scooterswapshop]

THANK YOU!

[@mariasocastro0821]

Do you have a video SHOWING the clutch grab/ engine shifting that you're talking about??

[@STMENTNETWORK]

Hey I have a question my 50cc clutch is not Engaging and my back wheel is not spinning. I brought a new clutch and Variator and still the same issue. The pulley is spinning the belt with the Variator it’s just engaging

[@williamhaskellhaskell3162]

Hi my 729 mm gates belt measures 721mm o.d. measured. Is this 8mm too short acceptable ? Thank you.

[@convictionmuzik7426]

I have a shenke 150 cc it would be ku if you did a video on one I wanna learn but I like the videos any way thanks

[@Scooterswapshop]

Conviction Muzik same theory applies on the gy6

[@michaelbaars7459]

Thank you for sharing! Don't you lose top speed when the bush is too long? When the rollers can not push the variator enough to push the belt in it's highest position?

[@Scooterswapshop]

we talk all about this

[@cliveswabs9365]

​@@Scooterswapshopcan u put the 4mm restrictor washer on first then the variator to kind of make a shorter boss?

[@OWELZIGEN]

Do you have 15.5 width and longer than the stock?

[@jod5659]

I'm going to try some of what I've seen in your videos with the CVT I have a 2013 VIP GY6 50cc, that has the 100cc BBK. Runs really good but would like to get a little more out of it. Is there a slide carb. That I can use with my bike???? Input would be much appreciated. Thank you for letting us ask questions. Oh "" I do all my own work and being a woman 55yrs of age, I have a lot of fun with my bike. Don't want to get off it sometimes. Yeah thanks for the help

[@Scooterswapshop]

Hi we have a good amount of parts to help I’d download the app and select the build invoice product and we can make you a package. A slide carb will never work good on that motor however

[@Sneds_]

Can you make a video on the polini transmission kit you sell for zuma 2t? It's the one that comes with variator, rollers, and springs.

[@Scooterswapshop]

which polini trans kit to be exact?

[@Sneds_]

Scooterswapshop www.scooterswapshop.com/collections/yamaha-zuma-02-11/products/polini-hi-speed-variator-kit-zuma

[@fadiabdo9976]

Gates RK japan belts are better than oem for suzuki burgman 250 cc?

[@minimaalinen337]

In some rare cases (in my experience) the stock belt and new belts matching stock are too short so shimming doesn't help with the rear/clutch fitment, so check that as well.

[@josepeixoto3384]

exactly: same problem as if you fit a 835-20-30 where a 842-20-30 should be

[@JordensCadet]

Is it ok to leave my cvt cover off and belt exposed? I have a 2014 Honda Forza 300

[@youtubenutzer6236]

I got 5,5gr in my 70cc zip. it holds his 8.600rpm and at 65 km/h it starts going up to 10.400rpm like it should be. Problem is That the setup starts getting power like 6.000 rpm, but original clutch comes at 4000 rpm. The belt is going inside right after. I can’t even put little harder springs in it, otherwise the belt is going to go inside before theclutch comes. The belt is moving inside like 5000 rpm. And if put lower rollers in it, it will not hold a too high rpm while acceleration... what can I do?

[@thomasfitzgerald7599]

I learned a lot here. Can u help with problems removing these nuts. Last mechanic put them on way too tight. Probably on purpose so I have to bring back to him. Thanks Your explain very well the doo's and the doo nots. SUBSCRIBED😎🤗

[@Scooterswapshop]

Impact driver

[@grantmara769]

Bro do u sell that fly face nut looks really nice

[@Scooterswapshop]

Grant Mara I have them coming in. I have 12mm Now. 10 is next

[@davebutcher701]

Hi, have you got any advise on converting a 2013 aerox 50 to a naked handlebar set up. cheers

[@Scooterswapshop]

sorry wouldn't know what clamp fits maybe modify a prebug aftermarket stem>?

[@davebutcher701]

Hi, ive got an aerox 50 . ive changed the rollers and the spring on the rear and clutch springs. It rides well with but its not very good pulling away. It feels like you could just hold it back. When starting on a hill it just doesnt want to pull away. it just revs hard until its doing about 5 mph then it starts to go ??? Any ideas. Thanks

[@Scooterswapshop]

I suggest learning about variator tuning and carb tuning then mess with the bike

[@RideQc]

More vidss!!!!

[@Scooterswapshop]

thank you

[@grizzhargest1900]

What shimmering part is that ?

[@PCG2022]

I know this is an old video but I'm hoping someone can help. Son just passed his cbt. The aerox 50 does exactly what you explained at 5:12. It slow from 0-20mph then it just takes off? After taking the cover off and idling the scooter it looks like the belt is very loose. The rear clutch height of the belt is about 3mm in the plates and not sitting on top but its close enough I think? The front however on the variator side the belt as plenty of play in it /spinning and from watching ur video the shim is too long? But this was a malossi kit with only 1 shim, new rollers installed with a new air filter and clutch spring. Any advice would be great so I can get the scooter to pull off how it should & let me, dad worry less about my son pulling out of junctions.

[@Scooterswapshop]

we have mutiple cvt videos that explain CVT tuning

[@traystunna]

Is there anything else that will cause the belt to slip like this, such as a bad contra or even too strong of engagement springs?

[@Scooterswapshop]

bad belt

[@veri__]

Hello i got my scooter shifting and running perfectly with my malossi special x belt. But the problem is that i shimmed it in the front and now when i put the variator cover on the kickstart mechanism scratches against the kickstart gear and it's loud because the front variator is so far out now. When i remove some shims the belt is too tight in the front and dips in the rear pulley and i get terrible take off but the cover fits... What do i do? Minarelli Vertical.

[@Scooterswapshop]

give the shop a call with your order and what not we can see what exactly you have and get you taken care of

[@user-nc9ke3nd4t]

that is my problem with my bike thanks thanks thanks

[@Scooterswapshop]

no prob

[@MustangNthusiest]

If I wanted to get my Kymco 50cc Scooter to go a but faster what would I need to do.

[@Scooterswapshop]

Depends on the bike hard to say without knowing what it is.

[@Kinamoto]

Hey, I need some help! Currently my boss is too long on my new variator and the belt is too loose, what should I do?

[@Scooterswapshop]

Purchase the correct boss

[@ninoechavez1402]

Hi man, with shimming on the drive boss will i not loose the kickstart if the crankshaft nut protrudes a lil bit?

[@Scooterswapshop]

Nino Echavez no it will still work depending on how many shims you use.

[@ninoechavez1402]

@@Scooterswapshop like adding 1mm shim i supposed on the drive boss. That should be fine ayt? Just worried about the crankshaft when the kickstart washer is not fully keyed in onto place on the spline with the added 1mm shim. Or could it be that the 792 16.6 30 belt m using is a bit thick?

[@ninoechavez1402]

Hi man. Before adding 1mm shim, i was having issues driving uphill from a stop as it seem to always bog down and not even move because i might have started like in 2nd gear. After adding 1mm shim, it has almost resolve this problem and i got more power and quicker on takeoff to get me to a powerband for hill climb. The position of the belt though still doesnt lie on the topmost of the rear pulley as seems like adding another 0.5mm shim will put the kickstart washer almost out of the spline.

[@edb3005]

Bro do you have any tips on a Adly GTA50? I have an issue where it will make like a vibration sound (can't determine were it is coming from, however, I can hear it in the muffler. I think) and when I hit a pot hole it will like not engage (slow down like it's not getting any power) and or shut my scooter down!

[@Scooterswapshop]

doesn't make much sense but sounds like somethings broke...

[@zizo0]

Hey can you tell me what is the best belt mesures for aprilia sr 50 with stock variator and cluch ? I have one yamaha should be 16.5x751 and i dont get all the way in the variator and even the cluch so it cant be faster than 65km/h

[@akabiscuitwaffle]

stock belt size since you're staying stock. What SR50 you have matters too. Since there's the 90's zuma minarelli engines, the 2000-2004 "Aprilia" designs (the variants of those years are mostly the same), and the 05 and later ones which just use the PGO/Vespa/Genuine/ETC design. There are technically more, but they're mostly just variants or updates of one of those 3 engines. The 2000-2004 DiTech ones have the tallest final drive, and the speedo reflects that showing up to over 100kph/70mph. Lower emission restriction for those years, and direct injection made them target a high compression, high torque design. As regular injectors cant fire fast enough to keep up with the doubled ignition of a 2 stroke, limting RPM to 10k-ish (maybe a tad higher) before the injector cant keep up. The piston is one of the largest 50cc pistons, and has insanely high porting and compression that keeps it to 50cc. The direct injection made it clean enough for those years to use a unrestricted stock expansion pipe. The stock power is insane given the size, hence the tallest gearing of any 50cc scooter to date. The 600$, one of a kind, fuel pump, goes out every 1,000miles/1,600km though. One of a kind in that it uses nearly 1/5th the power of other 120psi pumps, and that the bike has a very limited wattage allowance, means you cant stuff a different one in without killing the battery, or modifying the engine to charge faster.

[@Scooterswapshop]

not something we can get you. sorry

[@fxlyfewitzay7650]

so is this a 50cc?

[@thuhladshylla2353]

Please explain how carburetor work

[@Scooterswapshop]

We have a video on that.

[@michaelbearse4733]

Why would my wheel/clutch not engage at full throttle? I think its cause of the shim/ variator spacers not being put back in?

[@Scooterswapshop]

something sounds not put together right or broken

[@olliedb8346]

On a stock scooter is it a good idea to start with modified the cvt or start elsewhere?

[@Scooterswapshop]

yes cvt is a great place to start but know every time you change power you will be changing cvt as well

[@pacman6169]

i have the belt slipping situation with a liquid cooled minarelli top performance trophy 70cc block and my wingbell/clutch housing looks coloured - that means basically the thing in the middle of the vario in the front is too long ? or is it too short? i suspect its stock because the previous owner only changed the stock vario to a hebo next generation sport vario. before driving it revs up hard and then at some speed feels like its clutching. i hope that this is the solution for my problem :)

[@PchelaUbica]

What "thing"? I think that minarelli stock torque is the problem

[@pacman6169]

@@PchelaUbica with thing i meant the "boss" or what its called in english (sorry im from germany my english isnt the best)

[@Scooterswapshop]

Your belt could be too worn out

[@pacman6169]

@@Scooterswapshop thanks for the reply ! am going to check the belt in a few days and im going to post if its the belt , the last time i had it open the only other thing that was suspect to me was that the Variomatic itself had little Scratchmarks or Dents on the outside near to where it sits on the crankshaft. Is that something to worry about?

[@pacman6169]

@@Scooterswapshop I replaced the belt with a Belt from RMS (Dayco Kevlar) and it still seems happening. I now switched from a Laser X-Pro Exhaust to a Open Stock Malaguti F12 R Exhaust and now it catches the Low End Torque a bit earlier but other than that its still missing torque.. (i want it to drive away instant instead of reving up and then send power to the rear wheel) Could that also be the Clutch / Springs that are defective or not correctly setup?

[@petertabaday9012]

Where'd you bought that paddock stand?

[@Scooterswapshop]

We’re stage6 dealers

[@DanFilipi]

Why does the outer plate on the variator have teeth? Total newb here

[@Scooterswapshop]

That’s where the starter contacts it to spin the engine

[@jaidenwilliams4435]

i just bought a 50cc moped bored out to a 70cc still gotta break in the piston and its drives fine but when you start it and when it idles sometimes the transmission sounds bad and its like something is banging off of something, what could you possibly think this is ?

[@Scooterswapshop]

could be 30 different things go step by step if its making noise there is a wear mark some where

[@jaybier.2803]

Can u make video for that stand? How to do that

[@Scooterswapshop]

what?

[@jaybier.2803]

How did u make that stand sir?

[@the473hustler7]

That seems to short.. Bike will have problems taking of on hils..belt needs to ride lower down for proper take of..

[@Scooterswapshop]

no its perfect if anything on the long side,

[@lek2455]

hello, i am having some issues with my 50cc scooter, i have installed a big bore, A9 performance cam, racing cdi, performance variator and ive tried a bunch of different weights/combos, installed a performance exhaust, and clutch grab springs, my scooter only goes about 35 mph according to several gps apps, what else do i need to do to it to go to its full capability???

[@lek2455]

also ive installed a performance spark plug and coil.

[@Scooterswapshop]

Of the cdi isn’t a ncy scrap it as the blue china ones are worse than stock. I would ask the shop you got all the parts from because it sounds to me like they maybe sold the wrong parts. We do 50+ on a bbk with cam and head. Your cam timing could be wrong or valve adjustment issues also

[@lek2455]

Scooterswapshop where i ordered them from had good reviews and all the other customers were happy so i think i may have done something wrong,I am going to install a big bore carb tommorow and i will adjust the valves, they are set at .004 should i try .003 and if it doesnt help then .005?

[@fredpayton3790]

I’ve watched 2 videos on shimming, but neither one shows where the shims go. Which end of the boss?

[@chE3z1]

You want to add them on top of the boss, between it and the outer face.

[@adrianzayas4686]

And if you know what the problem is can you make a video of it

[@Scooterswapshop]

?

[@adrianzayas4686]

My VIP future champion. My muffler backfires not a lot just a little bit. what Does that mean do I got to fix something in my scooter

[@Scooterswapshop]

Sorry not super sure we don’t work on future champions, only current champions :)

[@MarilynmianMarilynmian]

Can make video of kymco bet win 250?

[@Scooterswapshop]

nope

[@Butters_Stunts]

What ID shims do I need for an af16 elite?

[@Scooterswapshop]

Hi we have the exact shim kit on sss it’s a pack of them

[@nicosanto1466]

What’s that rear wheel setup?

[@Scooterswapshop]

Belive a daytona on this, was years ago.

[@TheAllstun]

Please please please please please make more videos please please pl

[@Scooterswapshop]

we have several on cvt tuning!

[@camward4297]

Where do you buy the 6 stage kits from

[@Scooterswapshop]

We sell it all. Scooterswapshop

[@camward4297]

@@Scooterswapshop Ive got a yamaha cv50 jog 2010 model.. How much is the kit worth sent to Australia

[@camward4297]

Whats the idea with the open cut cases is it to do with the heat and to keep the heat out and cool it down.. Would it help a stock setup ive done the front veriator kit and lookin at doing the rear springs in the clutch

[@convictionmuzik7426]

So I can put a fatty tire on it right

[@Scooterswapshop]

no

[@dendys04]

hi can you please help me ? i did some shimming but now my kickstart is rubbing against the starter washer

[@Scooterswapshop]

Hi I’d suggest undoing what you did

[@dendys04]

@@Scooterswapshop yeah i already did it

[@johncarloquinones3652]

Anung magadan set ng panggilid sa honda tact af24 nka bore 2.00mm po

[@Scooterswapshop]

cool

[@MOTTOTROOPER]

What motor is that in the video?

[@Scooterswapshop]

Dio

[@MOTTOTROOPER]

Scooterswapshop Would the same stage 6 clutch and CNC Bell work for a Us variated AF05E? Considering making the purchase today. Thank you

[@MOTTOTROOPER]

Scooterswapshop I will purchase today if y’all believe it works with a US Variated AF05E. Thanks again

[@gabrielservin7824]

Gangsta paradise

[@Scooterswapshop]

thug life

[@lezyclan637]

My moped Wont run the variator all det Way out eny suggestions

[@Scooterswapshop]

not sure what you are asking

[@lezyclan637]

I can’t get the belt to run the variator all the way I have 7-9 mm left, do you have some advice so I can use the full potential of the variator so I can gain some top Speed

[@d-monster4340]

Where do put the shims , super confusing .

[@Scooterswapshop]

Put the shims between the boss and drive face

[@chandrakantindapurkar8738]

Could you show practically so that one can understand better

[@Scooterswapshop]

I have three Or four videos on cvt and shimming check them out it may make more sense

[@nycbikeclips4428]

If you tighten the variator nut, wouldn’t you know truly the difference? You can’t tell the difference if nut is not tightened all the way. Because at the end of the day you need to tighten it to drive it.

[@Scooterswapshop]

not to sure what your referring to exactly this is just asking about how to shim.

[@raniecranford4610]

Hi I by

[@Scooterswapshop]

hi

[@jeffquinones7532]

you guys suck at answering back emails like really.

[@Scooterswapshop]

I just looked, I answered your email immediately and then replied 4 times in the same day.. all the emails from you in my inbox have been answered next day. Or same day. I’m not sure how that can improve.

[@albirdie1630]

i am trying to revive an old 50cc scooter (sanli silverstone or some similar piece of chinese junk), it starts fine but when i open throttle it dies... can you help, i mean i know it has cdi and elctronic 'needle' (i dont know the formal name) on carburetor, but it really is a piece of junk so i dont want to spend more than 30 bucks, please help.

[@Scooterswapshop]

Hi there is no electronic needle and the cdi will not cause that. Do basic diagnostics clean the carb replace the plug.

[@albirdie1630]

@@Scooterswapshop i meant choke,,, the spark was changed first

[@albirdie1630]

@@Scooterswapshop carb needed thorough cleaning... thx

[@albirdie1630]

dudem if you have all that money to throw, maybe you should buy faster scooter

[@Scooterswapshop]

You don’t get it do you

[@albirdie1630]

@@Scooterswapshop clearly!

[@albirdie1630]

@@Scooterswapshop maybe i do today; i am trying to revive an old 50cc scooter, it starts fine but when i open throttle it dies... can you help, i mean i know it has cdi and elctronic 'needle' (i dont know formal name) on carburator, but it really is a piece of junk so i dont want to spend more than 30 bucks, please help.