Pocket Bike Forum - Mini Bikes - Reply to Topic
Thread: uberscoot 2x50cc Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the Pocket Bike Forum - Mini Bikes forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
02-13-2020 01:53 PM
EPR
Re: uberscoot 2x50cc

There is another way to increase compression on a stock cyld too, with a longer plug like C1. If you look at the stock short plug and the threads when its mounted there is a lot of space left. I bought a brass fitting that the long plug fit the inside, cut a piece off, cut it down to .250" to .280" as a spacer. Used copper washers and copper head gasket spray on all sealing parts. The long plug w/ spacer fills all the extra space. I had a post on it years ago, not sure if they cut the photos and post.
That and loosing the base gasket will make a high compression engine.
Or you can use a DiamondFire plus E3-12, it has a ring almost all the way around so it fires in all directions.
02-07-2020 03:57 PM
jdignan k thanks guys
02-06-2020 06:35 PM
CAM2
Re: uberscoot 2x50cc

Quote:
Originally Posted by jdignan View Post
stupid question but the open side of electrode on spark plug goes toward intake, exhaust or up?
The opening is supposed to face the piston or down...……...
02-06-2020 02:18 PM
MrKitty If you can index it so the open end of the electrode is facing down it's not that big of deal but every minuscule amount of power counts 🙂
02-06-2020 01:53 PM
jdignan stupid question but the open side of electrode on spark plug goes toward intake, exhaust or up?
01-03-2020 05:17 PM
EPR
Re: uberscoot 2x50cc

I use the RB bearings for 6.5" wheels, there made it Taiwan. Na Chi, made in Japan are good bearings also, I have some SKFs made in France.
01-03-2020 11:39 AM
MrKitty http://mcguirebearing.com is the local shop here in spokan wa they have one in tacoma wa as well they have never told me that they will have to order it i think they have everything in there warehouse i understand not every city is going to have a bearing shop but its worth googleing and calling around.

deep inside the transmishon there is a bearing being used as a thrust bearing for the shifting it goes out this is a known problem even the videos talk about it that one whould be first on the list to swap out
the second gear belt stretching is a known problem as well.
01-03-2020 12:46 AM
CAM2
Re: uberscoot 2x50cc

Quote:
Originally Posted by MrKitty View Post
my bearing shop in Spokane wa is priced competitively with the internet. i like fealing them before i purchase and they are onley 1 to 2 $ more eatch then the internet trash that you never know what your geting china knock off crap!!!

the uber scoot uses odd ball sized bearings.


In these days its hard for shops to stay competitive with the internet unless they do huge sales in it and then theyd have to have quite a place to store them all in order to satisfy all who enter... Not all shops have every bearing and that means "Special Order"....Special Order means special higher pricing...

Give your bearing guy a call and ask him what the 6904-RZ go for and whether he has 6 in stock...……...

Show me any bearings I posted to the OP as being china knockoff crap that's worse quality than he has installed already or reviews that state the stuff is inferior quality...Im pretty sure the boxes say France and Japan.....In case you didn't know Japanese made dirtbikes use Japanese made bearings.....

The boxes say Honda,Yamaha,Kawasaki and Suzuki but they are made by an outside vendor...…Also like car batteries....Do you think there are different manufacturing plants for the different brands....?....LOL

The OP stated the bearing # was 6904-RZ...Unless theres two different types Im not privy to like you are I guess the bearing comes one size at 20mm x 37mm x 9mm..It may be odd to you but that's how the Chinese roll and chose to use...…..LOL
01-03-2020 12:21 AM
CAM2
Re: uberscoot 2x50cc

Quote:
Originally Posted by EPR View Post
I buy mine online, 10 in a tube, free shipping and no tax. on the www. bearingsandbelts, and greatbearings .com. My last were from Amazon, crank bearings, deep groove, C3, 23,000 RPMs for a few dollars each, I compared them with my SKF can't feel any difference. I test mine with it on my finger and spin it with a 150lb of air pressure into the ball bearings with special gun. The China ones don't get near the RPMs as High quality bearings scream when I do that.

Yep I buy bearings in lots of 10 too...I change my clutch and wheel bearings pretty regularly……….….



Theres other things I buy in lots of 10 too.....LOL





01-01-2020 01:25 PM
EPR
Re: uberscoot 2x50cc

I buy mine online, 10 in a tube, free shipping and no tax. on the www. bearingsandbelts, and greatbearings .com. My last were from Amazon, crank bearings, deep groove, C3, 23,000 RPMs for a few dollars each, I compared them with my SKF can't feel any difference. I test mine with it on my finger and spin it with a 150lb of air pressure into the ball bearings with special gun. The China ones don't get near the RPMs as High quality bearings scream when I do that.
12-31-2019 10:14 AM
MrKitty my bearing shop in Spokane wa is priced competitively with the internet. i like fealing them before i purchase and they are onley 1 to 2 $ more eatch then the internet trash that you never know what your geting china knock off crap!!!

the uber scoot uses odd ball sized bearings.
12-31-2019 08:48 AM
CAM2
Re: uberscoot 2x50cc

Quote:
Originally Posted by jdignan View Post
ok i measure mine when i get off work thanks for the help, i googled 6904RZ but will take off bearings and measure them too, found a couple of bearing shops here
If you do go with a place for bearings prepare to pay the extra markup..[ie: $5.00 - 15.00 online bearing being $15-25.00 each at most local shops.]

Especially SKF brand

https://www.123bearing.com/bearing-6904-2RZ-SKF.php

https://www.amazon.com/6904-2RS-KSM-...RJ84FV8BWA9NV8

https://www.amazon.com/6904RS-Bearin.../dp/B002BBB03C

Ceramic bearings....LOL..[I wonder what they'd cost at a retailer...!]

https://www.amazon.com/6904-Ceramic-.../dp/B002BBF3SK

I once took all the crankcase bearings from inside a Kawasaki 450 4 stroker to a bearing shop because I wanted to finish the rebuild in the same weekend...They wanted $202.00 less sales tax for all...I waited an extra day and got an OEM Kawasaki crankcase bearing set online for $80.00 flat...…..

With all the bearings in a two speed transmission the price you'll pay would be slightly lower than buying a whole new trans unit when paying the markup prices.....LOL

[IMG]https://i.postimg.cc/cJt3DW57/EVOGear-Shaft-Assembly-2x.jpg


Its pretty easy using your cellphone to take a pic of the bearing then expanding the picture to get the right bearing # from off the bearing case or using a digital caliper to do an actual measurement of them but having the # is faster to find...

Its a lot cheaper getting them from places like ebay or amazon too.....

When it comes to choosing I always go with the rubber shielded deep groove design as the deeper groove design handles the sideloads exerted on them a lot better aswell as keeps the bearing better centered while the rubber shielding keeps out dust and water.\

Good Luck
12-30-2019 02:54 PM
MrKitty the bearing shop is 100% the way to go they might even have them in stock then you can feal eatch one and if you have any problems or need any help in the future you have somebody right there face-to-face that knows about bearings.
12-30-2019 02:02 PM
jdignan ok i measure mine when i get off work thanks for the help, i googled 6904RZ but will take off bearings and measure them too, found a couple of bearing shops here
12-30-2019 01:49 PM
EPR
Re: uberscoot 2x50cc

Most scooter has 4" rims, What are yours? I found nice tires for my scooter Kenda or something like that, there not slick but they handle great. They look like real motorcycle tires but smaller. Can post photos later, on my new laptop, no photos yet.
12-30-2019 10:57 AM
MrKitty you need to take the bearings out and take them to a bearing shop tell them you need skf bearings put ceramic bearings in the transmishon if you can afford it. you might as well replace the belts well your in there at least second gear belt...
12-30-2019 09:17 AM
jdignan ok i dont see uberscoot slick tires but the ones on the link u posted will fit? and i was going to get bearings but they have a lot for the uberscoot and dont have the details listed on existing bearings with the evo parts diagram, i know they need to be sealed
12-29-2019 06:06 PM
CAM2
Re: uberscoot 2x50cc

Quote:
Originally Posted by EPR View Post
Why not just wear out the tires you have, then get new ones??
Hopefully so....

For the least rolling resistance he needs to get 4" minibike slicks and way better higher quality wheel bearings then run them slicks with innertubes inside at 45-50psi each..

https://www.mfgsupply.com/gomini/gom...res4slick.html

If he has the 6.5" rims he can use cag slicks..
12-29-2019 12:32 PM
EPR
Re: uberscoot 2x50cc

Why not just wear out the tires you have, then get new ones??
12-28-2019 01:56 AM
jdignan ya ill get street tires next then
This thread has more than 20 replies. Click here to review the whole thread.

Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome