ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

A place for Monkey Bike and Mini Bike (including Grom/MSX) enthusiasts. This will be moderated in accordance with C90Club rules. Welcome!
Post Reply
User avatar
steveST100
Posts: 1888
Joined: Tue Oct 25, 2011 3:04 pm
Rides:: 1983 C50LAC 1976 ST100 1980 ST70
Location: Clitheroe Lancs

ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by steveST100 » Mon Mar 12, 2018 6:52 pm

Few people have asked about the wheels on the ST and CF so thought i would put this bit together.
Some of the 3 and 4 spoke wheels i have for some of the bikes i'm building.
Image
Image

4 spoke wheels.
4 spoke front.
The 4 spoke was used on the ST50/70 in both 6v and 12v and the CF50/70 only in 6v.
Brake side,note the plate is on the left side and has screw on speedo cable.
Image

Image

Inside of hub and brake plate with the speedo drive in place.
Note upright tabs on the drive and slots in the hub.
Image

Speedo drive.
Image

4 spoke rear.
Brake side.
Image

Inside of hub with brake plate.
Image

Sprocket side.
Crush drive rubbers and rear sprocket removed.
Image

Seal and spacer and you can see the groove for the C-clip that holds the rear sprocket on.
Image

steve g

User avatar
steveST100
Posts: 1888
Joined: Tue Oct 25, 2011 3:04 pm
Rides:: 1983 C50LAC 1976 ST100 1980 ST70
Location: Clitheroe Lancs

Re: ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by steveST100 » Mon Mar 12, 2018 7:08 pm

3 spoke.

This was only used on the 12v CF50/70.
Front.
Note plate is on the left side.
Image

Other side.
Image

Brake plate.
Note push in speedo drive cable.
Image

Inside of hub and brake plate.
Note the flat tabs on the speedo drive and raised bits on hub.
Image

Speedo drive in plate.
Image

Rear.
Image
Inside hub and plate.
Image

Sprocket side.
This hub was missing the seal,showing sprocket held on by the C-clip.
Image

steve g

User avatar
steveST100
Posts: 1888
Joined: Tue Oct 25, 2011 3:04 pm
Rides:: 1983 C50LAC 1976 ST100 1980 ST70
Location: Clitheroe Lancs

Re: ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by steveST100 » Fri Mar 16, 2018 5:33 pm

Rims.
4 spoke.
These have 4 smaller 6mm holes and 4 8mm holes.
Image
There is only one bolt hole between the spoke webs.
Image

3 spoke.
These have 6 6mm holes and 3 8mm holes.
Image
There are two 6mm holes between the spoke webs.
Image

Hub nuts and bolts.
The bolts are stock 8mm type but the nuts are a larger size than a stock 8mm nut.
Best to save the old nuts and have them replated.
Small size nut over the larger type.
Image

Smaller stock nut in the larger hole that the hub nuts fits in.
Image


steve g

Monkster
Posts: 18
Joined: Mon Jun 04, 2018 1:55 am
Rides:: 1972 ST70 115cc 1976 Chaly 119cc Prev 1986 C90E
Location: Sheffield

Re: ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by Monkster » Fri Jun 15, 2018 12:03 am

Hi Steve,

Great info - I see you've tidied the garage :lol: Am I right in thinking the 12v 3 spoke runs the same brake plate as a Cub or a CG?

I may have a set of 4-spoke type standard ST70 steels for you if you need 'em as I've been having a clear out. I'll confirm later if it's 2 complete wheels. I've also been onto Minibike Craze this afternoon and ordered another Kepspeed front wheel as my modified Chaly mudguard is just fouling the tyre on the GT Dax but its too much of a risk should the tyre expand at road speed. Dropping from a 3.50 to a slender 2.75 (which was near enough my standard test wheel) gives plenty of clearance with the 110/80/10 Zippy 1 and will probably keep the front end sharper in corners. MBC are working from home now and I'm going over to collect it next week.

BTW, this is my first [test] post. I ought to introduce myself formerly but I'll not bog down the thread any more.

Russ (Monkster)

User avatar
steveST100
Posts: 1888
Joined: Tue Oct 25, 2011 3:04 pm
Rides:: 1983 C50LAC 1976 ST100 1980 ST70
Location: Clitheroe Lancs

Re: ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by steveST100 » Fri Jun 15, 2018 4:53 pm

Monkster wrote:
Fri Jun 15, 2018 12:03 am
Hi Steve,

Great info - I see you've tidied the garage :lol: Am I right in thinking the 12v 3 spoke runs the same brake plate as a Cub or a CG?


Russ (Monkster)
Me tidy the garage,any flat place is a shelf in there.
As for the brake plates the rear 4 spoke will use the early 12v cub but the fronts are on the left hand side and not the right as a cub and have different gearing in them.

steve g

Coddex
Posts: 1
Joined: Mon Feb 06, 2017 8:47 pm
Rides:: C70

Re: ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by Coddex » Sat Feb 24, 2024 8:43 pm

Hi, I know this is an old thread but I’m just about to purchase a 1984 3 spoke cf50
According to your data it will be a 12v
Am I correct ?

User avatar
steveST100
Posts: 1888
Joined: Tue Oct 25, 2011 3:04 pm
Rides:: 1983 C50LAC 1976 ST100 1980 ST70
Location: Clitheroe Lancs

Re: ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by steveST100 » Sun Feb 25, 2024 1:38 pm

Hi Coddex.
Yes should be 12v also should have a square headlight and the front rack. Mudguards should also be plastic and the seat is a different shape to the 6v one and it should have a seat lock on the back.

steve g

User avatar
steveST100
Posts: 1888
Joined: Tue Oct 25, 2011 3:04 pm
Rides:: 1983 C50LAC 1976 ST100 1980 ST70
Location: Clitheroe Lancs

Re: ST50/70 Dax and CF50/70 chaly 3 and 4 spoke wheels.

Post by steveST100 » Sun Feb 25, 2024 1:43 pm

Add to that the rear brake is on the bars and works with a cable as there is no rear brake peddle. To tell if the frame is a 12v or 6v one just look where the rear brake switch would fit as the 6v has a bracket and the 12v this is missing. Having to have one fitted to my frame as going to be running a manual engine and need the bars free for the clutch lever, but converting the rear brake one to the clutch one.

steve g

Post Reply