CVT PB/Goped CVT Opinions

[DIYMark]

Hi,

I was after peoples experiance/opinions with the Pocket bike CVT's.

From my understanding the CVT's used on goped are the same as the ones used for pocket bikes? Is this correct? Or are they separate units for gopeds?

Also, I under stand there are 2 types of CVT's. One with a flat cast aluminium cover and the one with a Plastic chrome/black rounded cover?

The only difference I can see between these two types its that that one has the "reverse rotation" gearing at the clutch end and the other has it at the output end (sprocket)? Its this all that is different between the 2 cvts or is there more?

I am asking this because I am intrested in buying one and was wondering if a paticular model was inferior to the other in any way. So, is there any differences in the actual mechanics of both cvts units or do they both use the same variator/pulley setup?

Ive also heard they thay are ALL junk! However, would $100 including shipping be a reasonable price? Because that how much it would cost me to get one from the US and I cant justify 100 bucks for what maybe junk!

So please, could any one with information or experiance with these CVT's post up their thoughts.

Thanks.

 

[spad4me]

If it does not look like this it is a transmission not a CVT.
Why not wait for a few weeks to decide if they are worthwhile for your use!
I have purchased cvt's from fancyscooters the quality is Chinese. The good the bad and pot metal.

http://www.fancyscooters.com/item00478-scooter-part-ninjia-cvt-transmission.html

 

[DIYMark]

That CVT in the picture looks pretty good... but then so does all the HT and pocket bike engines lol. Anyway, If it comes down to it and the CVT I end buying is ****, I can use the pulleys and machine/fabricate my own CVT I guess. Thanks for the link!

 

[Large Filipino]

That cvt on that link looks like a direct bolt on to my Titan. I'm rather thinking of doing away with the 3 speed hub because I can't find any sprockets bigger than that 19 tooth. The 20 tooth jackshaft sprocket plays some havoc with my current arrangement because it's made for a bigger shaft the adaptor sleeve tends to make this sprocket want to walk away from the jackshaft. No big deal it happens every few days it takes nothing to bring it back on line but it tends to be a bit of a pain. That CVT sprocket can be removed and replaced with the 10 tooth sprocket from my 5 to 1 Titan gearbox then I can remove that 20 tooth jackshaft sprocket and put in my 14 tooth no adaptor sleeve needed after putting back my 5 speed wheel using the big sprocket on there.
It also freewheels so just throttle and go. And no more adjusting that 2nd gear for when it's off adjustment it will slip.
I gotta save up for that. Maybe in a couple of months. I gotta get with my curiosity.
But man if I do this I better get my brakes situated first.

 

[Nuttsy]

DIYMARK,
Post up a pic/site for the flat cover one. The one 'Spad' posted is the popular one some (including myself) are using. If the flat cover one is the one I'm thinking of, then it is just a gear reduction unit and NOT a CVT. They sell for around $30-ish. Inside the box is just a chain drive from gear to gear. Also, some of these things ARE cheaply made. That is to say the MFG. uses low cost bearings, seals, and such. The ones like Spad linked to is painted silver INSIDE AND OUT. That paint can play **** when it flakes off and gets into the bearings. Ya may want to strip it early on before it can do any damage.The unit as a whole is good though, and you can always upgrade bearings rollers etc. In fact, you SHOULD upgrade some things to "tweak" the unit to YOUR specific needs and engine characteristics. For $70 shipped, IT IS WELL WORTH IT!
WC

 

[DIYMark]

Nah the one with the flat cover is a proper CVT not the chain reduction which Ive seen advertised as a CTV (Heh, sneaky isnt it).

The only difference between the plastic and metal cover versions is where the reverse direction gear box is. The metal cover one has it at the clutch, the plastic cover one has it at the sprocket. Im 99% sure the interals are identical in both units.

Oh yea and if I do buy one the mandatory thing I do with all chinese stuff I get is new bearings, seals, lube and a inspection (intresting/pathetic how you buy a HT 80cc and theres swarf in the cylinder and head ahhaha)

 

[spad4me]

Nah the one with the flat cover is a proper CVT not the chain reduction which Ive seen advertised as a CTV (Heh, sneaky isnt it).

The only difference between the plastic and metal cover versions is where the reverse direction gear box is. The metal cover one has it at the clutch, the plastic cover one has it at the sprocket. Im 99% sure the interals are identical in both units.

Oh yea and if I do buy one the mandatory thing I do with all chinese stuff I get is new bearings, seals, lube and a inspection (intresting/pathetic how you buy a HT 80cc and theres swarf in the cylinder and head ahhaha)

I just received a cvt from a different seller it MAY be slightly higher quality than the one I posted. MAYBE!


It still looks exactly like the pictire I posted !
I have never seen the ones you are describing..
BUT I LIVE IN THE MIDDLE OF NOWHERE.

 

[spad4me]

That cvt on that link looks like a direct bolt on to my Titan. I'm rather thinking of doing away with the 3 speed hub because I can't find any sprockets bigger than that 19 tooth. The 20 tooth jackshaft sprocket plays some havoc with my current arrangement because it's made for a bigger shaft the adaptor sleeve tends to make this sprocket want to walk away from the jackshaft. No big deal it happens every few days it takes nothing to bring it back on line but it tends to be a bit of a pain. That CVT sprocket can be removed and replaced with the 10 tooth sprocket from my 5 to 1 Titan gearbox then I can remove that 20 tooth jackshaft sprocket and put in my 14 tooth no adaptor sleeve needed after putting back my 5 speed wheel using the big sprocket on there.
It also freewheels so just throttle and go. And no more adjusting that 2nd gear for when it's off adjustment it will slip.
I gotta save up for that. Maybe in a couple of months. I gotta get with my curiosity.
But man if I do this I better get my brakes situated first.

It looks like thats dax sells the correct sprocket for the cvt output shaft it is the same as the one for your dax transmission output shaft , Maybe a little grinding.

 

[DIYMark]

Heres the metal cover one Im raving on about www.pocketbikeparts.com/product_p/x1tx300987.htm

Its pretty much the same except cover and location of the geared section. However this version is designed for older bikes so If anyone chooses to buy one, get the rounded plastic cover version (comes in chrome or black colour).

 

[capturedbyrobots]

The CVT we use is from an X2 pocketbike.
Gopeds (only DIY custom ones use them) use the same one.

That link you just posted sure looks like a gear box, as X1 bikes do not have a CVT

Can you show an internal picture of the pulleys and belt?
Is the reduction the same? I've heard that one has more reduction,
and also has a 3rd bearing support for the end of the variator shaft....


As for them being junk,
I ride mine every day. It has lasted just fine,
though I do have to tweak it sometimes. Tuning is key,
if you don't get it tuned in right for your engine, it will be worse than
not having a CVT at all.