Jonway Ranger yy250t!new questions :D! By slovenian (Read 2,995 times)

[slovenian]

Hello all,

This is my first post in the forum so... please bear with me....

I bought Jonway Ranger yy250t a month ago. After a week my rear tire delfated while riding ( dont know how is it called in English, but that "pin" for inflating tire exploded and tyre deflated.... I fixed that, bought a new tyer and bla bla bla....

so the issues that i have are:

1. Loss of speed after fixing the tyre.

2. When i start from 0 mph it vibrates a litte (too much), when scoot gets some speed its gone (when clutch releases).

3. When i cruise at 20 mph and not excelerating i hear a squealing sound ( maybr from CVT area)... until i hit the throttle it is squealing and at cca. 30 mph it stops. ( rollers? belt? ....) (it is very lound)

4. My top speeds is only 60-65 mph (100-105 kmh). How can i encrease it? is it normal? ( i have 100 KG)

5. the lights seam very dim! and need to adjust them (hight of the light beam! do i need to remove the whoole front plastic?)

The scooter is nice and i love it very much! But i think it has lots of problems. I bought it from some scoot repair shop, and they said it was checked very good! I called them the other day and said to them: There is no oil in the engine ( i was lying ), and the guy said: we checked tyre presure, if the lights work... bla bla bla...

I suspect that there was no real good inspection and wanna do it myself!

6. What are the key spots to check?

Im no mehanic, but my father was! Car mehanic he was, but he can help me, if needed. But i learn quite fast.

I intend do change all the oils it the scoot ( engine, transmision, brake), i wanna buy new rollers ( 21g??? for better top speed) new belt...

Can someone give me some tips? I need some help and opinions!
I was reading the forum fore the past month and i think that here is a very nice comunity! Im from EU so my English in realy rusty, im sorry for that!

Thanks in advance!

Take care, and safe riding!

Damien

[Alleyoop]

Squealing is ususally the CVT, most likely the belt is slipping. Check your belt and rollers. The loss of top end is probably due to the rollers having flat spots and or the belt is worn down to much. The vibrating starting off or going slow is most likely the Clutch pads are glazed and are slipping at low rpms. Once you get enough rpms there is enough centrifual force to throw out the clucth pads with enough force to really grab the bell. You can rough up the pads with some sandpaper or just scrap them with some to get the glaze off.
Alleyoop

[rob63]

Hi bud,
I haven`t got any personal experience on your model of scoot but will try to help.
Depending on how violent your tyre blew out, there might be something amiss with your drive train. It`s probably worth taking off the drive cover to inspect the variator, belt and clutch.
If you take all three items off the scoot, examine the rollers in the variator to see if they have tipped or have flats on them. Check the belt for fraying or wear. Check that the clutch moves freely on the shaft, and when you rotate the rear wheel there is no odd noises from the final drive.
The top speed is about right, the scoot specs say about 68 to be max. You could experiment with slightly heavier rollers, it might give you a few mph more.
Not sure on the lights, it`s probable that you have to remove the plastics to get at any adjustment. Also check the wiring to the bulbs, especially the earth, if the earth is bad then the bulbs can sometimes seem dim.

Edit....beaten to it by Alleyoop

[slovenian]

Hi guys,

I realy apreciate the help, I realy, realy do!

Yesterday i took the front mask of to adjust the hight of the light beam (it was to low to realy see good at night). I didnt know how to get behind the lights, so i just took off the front mask. All good now!

Im a novice mehanic, and I only did small repair to my scoots in my life (mainly 50 ccm). So i realy must ask some stupid questions.

Here it goes:

allyoop said:
"Clutch pads are glazed and are slipping at low rpms. Once you get enough rpms there is enough centrifual force to throw out the clucth pads with enough force to really grab the bell. You can rough up the pads with some sandpaper or just scrap them with some to get the glaze off."

Can u be more specific on how to do that. (im attaching a picture and I highlited the part of the clutch! so i just sand the surface of the highlited area with sand paper???)


If Im gonna change the rollers in variomat wich ones will be the best for gaining the speed. I was reading a post on the forum, and the post said the 20 or 21 grams rollers are best! Is that true?

Is there any internet site that i can order, lets say: new clutch, rollers, belt.... cause i cant find no dealer in my country for JONWAY motorcycles!


If a found the store with some parts, belt rollers and so on... but im not sure if they have anything for jonway, cause im not sure wich belt and rollers I need...

Can anyone give me some specifications on the ROLLERS, BELT, and CLUTCH... Can i install whatever clutch for 250ccm scooters...

P.S. My scoot has 7000km (5000 miles) and the belt was changed at 3000 km/ 1500 miles....

can it relay be that the belt is that bad??

Can i realy fix the clutch with a simple sand paper? or is it better to buy a new one?



**so can u answer this: specification (numbers/type) of rollers, belt, clutch. Where to buy/order (internet). How to fix clutch with a sand paper (watch picture), i need more direct instructions.**

Thank you so very much for the answers lads!

Have a safe ride!


Damien

[slovenian]

Picture!!!

Is the part in RED, intended to be sanded with SAND PAPER?? If NO, wich one needs to be and how much. Just to sand the surface?? 1 mm, 2mm??



Thx

Have a safe ride!!


Damien

Attachments:

[rob63]

Yes that`s the part in red, they get smooth with use so you just need to rough them up with sandpaper to take the smoothness off. You don`t need to take too much off, just rough them up.
Your belt should have numbers on which are the measurements of the belt, take it along to a scooter or car parts store and they should be able to order one for you.
The rollers on your scoot are I think 23x18, if you`ve got a set of digital scales you can weigh them. I think they may be the same as fitted on a Honda Helix. Try and go a few grams heavier as that will bring your engine revs down, which hopefully will mean more top end.