1977 Honda CG125

Anything else ya ride!
Post Reply
User avatar
Alan CF
Posts: 6750
Joined: Mon May 09, 2011 6:10 pm
Rides:: CUB RACING small cc engine rebuilds crank repairs
Location: CHESTERFIELD

Re: 1977 Honda CG125

Post by Alan CF » Sun May 17, 2015 7:15 am

While between fixing printers all this week down the shed i just could not keep me hands of her,
Removed the air filters and they just crumbled in my hands, ( a good sign she has not been played with ) Got new head bearings ( tapper rollers ) :)
and a new battery,

Image

Image

User avatar
Diesel Dave
Posts: 11055
Joined: Tue Oct 13, 2009 7:25 pm
Rides:: 1965 Enfield Diesel, 2017 Sterling, Modenas Kriss and CT200 - the only Cub left
Location: Brentwood, Essex

Re: 1977 Honda CG125

Post by Diesel Dave » Sun May 17, 2015 8:36 am

My yellow 2CV van had a filter in a similar state - the motor ate it.

User avatar
ll81
Posts: 2615
Joined: Sun May 01, 2011 1:25 pm
Rides:: CBF125 Z250SL
Location: Near Boston, Lincolnshire, UK

Re: 1977 Honda CG125

Post by ll81 » Sat May 23, 2015 12:03 am

Resurrected a 1978 model last year after a complete engine rebuild changing every bearing and fishing the bits of piston and valve out that had been going round in there from a previous failure.

FYI another bike where you can just swap everything for 12v (except coil) and significantly improve the lighting. Interestingly it is in every gear locked side by side with my CBF125. Absolutely nothing between them in top speed either apart from down hill. CBF will rev a little more and pull about 5 mph more.

User avatar
Alan CF
Posts: 6750
Joined: Mon May 09, 2011 6:10 pm
Rides:: CUB RACING small cc engine rebuilds crank repairs
Location: CHESTERFIELD

Re: 1977 Honda CG125

Post by Alan CF » Sat May 23, 2015 8:57 am

ll81 wrote:FYI another bike where you can just swap everything for 12v (except coil) and significantly improve the lighting.
Great :D , thank you. I was wondering if they all where interchangeable,
Having problems finding some parts, want to go OEM with all the parts i need to replace, except plug and oil of course :) ,
But this one is so early ( giver way being the front fork design ) that they fitted the silver CG100 HM-22M headlight shell, 61301-391-000MA
MA=Silver :cry: Hope to find one at the classic mechanics show.

User avatar
ll81
Posts: 2615
Joined: Sun May 01, 2011 1:25 pm
Rides:: CBF125 Z250SL
Location: Near Boston, Lincolnshire, UK

Re: 1977 Honda CG125

Post by ll81 » Sat May 23, 2015 8:13 pm

We put the old CB100N on front end on. It's a proper bitsa. Never liked traditional CG front ends. Too sit up and beg with poor brakes.

Later Brazil parts all fit the early engine, high output stator with standard yellow white lighting coil and Cub style regulator gives even better output but still using points.

Primary drive, clutch and oil pump off Brazil fit too but are different so can't be mixed with jap bits, need changing as a set. CB100N casing and oil pump give you rev gauge drive if you want it.

User avatar
Alan CF
Posts: 6750
Joined: Mon May 09, 2011 6:10 pm
Rides:: CUB RACING small cc engine rebuilds crank repairs
Location: CHESTERFIELD

Re: 1977 Honda CG125

Post by Alan CF » Sun May 24, 2015 10:22 am

New head bearings fitted, and de greased front wheel and yokes.


Image

User avatar
Alan CF
Posts: 6750
Joined: Mon May 09, 2011 6:10 pm
Rides:: CUB RACING small cc engine rebuilds crank repairs
Location: CHESTERFIELD

Re: 1977 Honda CG125

Post by Alan CF » Tue May 26, 2015 10:21 pm

All cleaned up, removed both mudguards, cleaned off the old mud and rust cured, then some was oil on the underside.
ordered up the new headlight shell.

Image

Image

User avatar
zippy
Posts: 1736
Joined: Wed Jan 26, 2011 3:35 pm
Rides:: 1982‪ Honda CT50JC Motra 1972 Honda ST70 1972 Honda Z50A K3
Location: Wirral

Re: 1977 Honda CG125

Post by zippy » Wed May 27, 2015 12:12 am

lovely, and to highlight the beauty of older bikes.

to adjust tappets..

CG125:
1. remove rocker cover
2. T mark flywheel.
2. adjust..

Honda Bros

1. Remove seat (with key).
2. Remove tank (rear bolt, front bolt, then thread rear into
front pin and pull. Fuel lines-turn off petcock.)
3. Remove airbox (front nut on stud, unclip wiring harnesses,
remove purge lines, unclamp from carb throats.)
4. Remove horn (one bolt--clearance needed for radiator).
5. Remove radiator mounting bolts. (two in bottom, one in double
shear at top with nut). Careful--mounting bracket is weaker
than torque needed to shear Locktite.
6. Remove mounting stud for thermostat (same stud as air box).
7. Remove fan mounting bolts (three) and electrical connector.
8. Remove inset plug wires (one from each cylinder).
9. Remove the two valve-cover mounting bolts from each cover.
10. Remove valve covers. Rear is obvious. Front must be carefully
snaked under thermostat, through the front of the frame, rotated
down behind radiator (fan moved aside) and pulled out horn-side.
At least this is how I managed to do it. You may be able to
leave the fan and horn in place, but it isn't worth it.
11. Remove crankshaft bolt cover and timing mark cover (left side
of crankcase).

:lol: cry :)

User avatar
Alan CF
Posts: 6750
Joined: Mon May 09, 2011 6:10 pm
Rides:: CUB RACING small cc engine rebuilds crank repairs
Location: CHESTERFIELD

Re: 1977 Honda CG125

Post by Alan CF » Fri Jun 12, 2015 7:24 pm

Original headlight and shell found, And fitted. :D

Image

Image


Need to fix the bodge from new when the bike shop drilled the back bracket, ( must have been a friday night sale ) :roll:
Tig weld the hole and re drill in the correct slot...

Image

User avatar
zippy
Posts: 1736
Joined: Wed Jan 26, 2011 3:35 pm
Rides:: 1982‪ Honda CT50JC Motra 1972 Honda ST70 1972 Honda Z50A K3
Location: Wirral

Re: 1977 Honda CG125

Post by zippy » Fri Jun 12, 2015 10:54 pm

too new now :lol:

Post Reply