CG125 BR 1986 - A question about spokes

[samebb]

Hi there.

I'm in the middle of my first restoration project and I am a little stuck. I'm hoping someone here will be able to offer some knowledge.

I need to get a new spoke sets for the front and rear wheels. I have googled everything and I simply can't find out what spokes fit this bike from anywhere where I can buy spokes. The original part numbers don't seem to be available anywhere.

I have all the information on the rims:-

Rim size
Front 1.40x18
Rear 1.60x17
Rim maximum runout — radial and axial 2.0 mm (0.0787 in)
Spindle maximum warpage 0.2 mm (0.0079 in)

And the sizes of the spokes, original part numbers:-

Rear Wheel
==========
Spoke seb B 9x170
The spare spoke set b 9x170 part number 972805218010

Spoke set B 9x169,5
The spare spoke setb, 9 x 169, 5 part number 974915217910


Front Wheel
=========
Spoke set B 10x197
The spare spoke b, 10x197 part number 972264223410

Spoke set B 10x196.5
The spare spoke b, 10x196.5 part number 975504223310


From what I understand there are 4 different sizes of 10 spokes, which I believe are "Single Gauge".

Does this mean I can buy any spokes this size and they will fit? Surely there is a different between different motorbike manufactures?

If anyone has any experience with this, your help would be greatly appreciated.
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New to restoring bikes

[Bhud]

You have 4 different spoke sizes because there is a size specified for:

- Front inner spokes
- Front outer spokes
- Rear inner spokes
- Rear outer spokes

From the measurements you've given, there is only 0.5mm difference between inner and outer spoke lengths, on both front and rear wheels. However, they will also have a different bend angle - this is the important bit.

You will either have to buy the original parts, using the Honda part numbers you already have, or you will have to buy aftermarket spokes, using 4 different dimensions:

1) Spoke length (as mentioned, there are 4 sizes)
2) Spoke angle
3) Spoke nipple diameter
4) Spoke thickness

Spoke angle (the angle where the bend is in a spoke) is critically important, when choosing spokes. Therefore, if you're not going to buy Honda originals, you will need to find out 4 different spoke angles. This is important because when spokes fail, they do so at this point (i.e. close by where this angle is). You also need to make sure that the spoke butts (close by the spoke bend) are sufficiently broad in diameter that they have a good purchase on, and are sufficiently braced against, your wheel hubs. As mentioned, this is where spokes fail.

Spoke nipple diameter is also very important, because you don't want to buy aftermarket spokes and then find out the spoke nipples don't seat in the rim. This is quite likely to happen, because a lot of good spokes these days are being manufactured in Thailand, with a thick spoke nipple that might not sit in their seats, on your rims. So you need to obtain that information before buying.

Spoke thickness is also criticially important. If you're choosing aftermarket, generic spokes, you should first use a micrometer to check the thickness ("gauge") of your existing spokes. It's a motorbike - you want your new spokes to be the same thickness or thicker, but never thinner. You can look up on Google and convert mm values to spoke gauges.

No, you don't buy "10 of each". Count how many spokes you have on each wheel. It's probably 36. You need to find out what "10" means. It could mean 10-gauge (again, use your micrometer and check the thickness of your existing spokes). Assume nothing. Check your gauges, your spoke bend angles (Honda will have published that information somewhere, so if you can't find it keep asking around) your spoke butt diameters and your nipple diameters.

Hope that helps

[Easy-X]

If you have samples of each type of spoke just send them off and a wheel/rim/spoke specialist will just make a set for you.

These guys helped me out:

https://www.devonrimcompany.com/
____________________
Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[WD Forte]

I'm guessing A/B is angle, 9/10 gauge, followed by length
The part number 972805218010
gives me the OPs gauge and dimensions ie A9x170 but for a CB125S
no CG125 mentioned

you got the wrong wheels or a bitsa mebbe?

Re gauge:
its probably AWG or SWG
10 SWG is 3.251mm dia
10 AWG is 2.59 mm dia
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bikers smell of wee