Need help with CG125(1989) Any advice appreciated. Thanks

charlie1985 · L Plate Warrior Joined: 02 Jun 2006 Karma :

Hi guys,
Just bought a Honda CG to do a little commute on. Picked her up and had instant problems.... it cut out 2 miles from pick up. After that i couldn't get any ignition (no neutral light or bike lights when engine not running but ignition on.) So i replaced the battery for a tenner and that brought back the ignition, good spark, and my lights worked just off ignition.
LOL that got me running for another few miles, she cut out again! (it kinda coughs splutters, few back fires, absolutly no power then cuppla hundred metres later she dies.) I bit the bullet and took her to a garage, worked with the guys, had the rocker cover off they wern't happy with the clearance at the top of the valves, so we set them up. We cleaned the carb, and they were happy with the carb. Mechanics wern't very happy with the compression said it was quite weak (that was only feeling off the kick start). But with me being tight i told them to ignore that for now, i just wanted to limp home and get a post on here!
So I was back on my way..........got about 25 miles this time, then i had the same failure as the previous time, cough splutter, gradual loss of power. Any higher gear than 3rd and it wudda died instantly, i stuggled in 2nd for about 300 metres then power ran out all together and it stopped. Oh and after the stop it's literally imposible to start again, i had to push the last mile to my house. But i left it for a few hours then i cud just about get it started again after bumping it, but it will die quite quickly, and now im not gonna take it on a run till i've changed something!
Right then, whats every1's thoughts? These are simple beasts, and are very few things to go wrong. Im quite drawn to the coil & compressor and then the rectifier. I believe these all have an affect on keeping the battery charged, starting and keeping a good constant spark whilst running?
I'm slightly worried about this compression issue, but wud that give me my symptoms bearing in mind my exhaust smoke is ok and i covered a good 25 miles of fault free running. Air filter is clear ish, there is plenty of fuel, and a good battery.
Any suggestions are greatly appreciated, and CG owners with similar problems would be fantastic!!!

Many Thanks

Charlie

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

You don't have a compressor.

Get it rebored, change the points and capacitor. Check the charging system.

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

First off. If you bought it from a dealer/bike shop. Take the fucker back because it is broken.

If you bought it privately and 'sold as seen' then you'll need to sort it out yourself. Sounds like an electrical issue of some sort to me, otherwise a new battery wouldn't have sorted it.

:edited:

EDIT: Didn't read your post properly. A 1989 one should make its own spark. Does it have one? What does the plug electrode look like? Does it have enough fuel in it?
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

DynamiteBoy · Scooby Slapper Joined: 09 Oct 2005 Karma :

danzai66 · Scooby Slapper Joined: 24 Oct 2005 Karma :

don't do what i did and leave the choke on...

(i even took it in to a garage...lets say it was a bit embarrasing picking it up again...)

sounds silly but i'd double check ... Very Happy

____________________
Ridey, riding a Black '08 CBR600RR

charlie1985 · L Plate Warrior Joined: 02 Jun 2006 Karma :

Sorry i didn't mean "coil & compressor" i meant "coil & condensor" She's got more than half a tank of fuel in it, although im slightly worried it cud be pulling crap through it coz it was sat up for 4 months with a tiny bit, but i topped her right up with optimax.
Choke is deffinatly off, i've checked and double checked with lots of ppl, and then pulled off the air filter pipe to have a look at the gate for peace of mind.
Having the engine rebored or fitting new piston is the last thing im going to try, i want to try everything around it 1st thats cheap and easy. When the engine is running, she actually sounds alright, massive flat spot at 55, and she wont go anywhere. 60 down a hill. But thats the same with every CG.
Only had the plug off once, and it showed signs of overheating (whitey) haynes manual says thats caused by ignition system fault, incorrect fuel or cooling system fault.
So thats where im upto today (saturday the 3rd june) Im about to pop out to buy a new spark plug, and a cuppla tools i need. I've ordered a new coil & condensor and a rectifier off e bay.

Anymore suggestions greatly appreciated.

Charlie.

kintheuk · Two Stroke Sniffer Joined: 29 Apr 2006 Karma :

Check that the fuel is still getting through as I remember someone on my travels having problems with the tank not getting in air to replace the fuel used and causing a vacuum which prevented fuel leaving the tank, once the bike had been left for a while the air slowly got in and the bike ran fine for a while. May be worth a try?

charlie1985 · L Plate Warrior Joined: 02 Jun 2006 Karma :

The spark plug indicates lean running, the carb was checked and is fine, i've pulled the hose off the tap on the tank, fuel is coming through there lovely. But i never thought to check that everytime i broke down.
As for air getting in i presume there is a breather pipe or somehting? I'm not fiddling with the bike until my coil arrives, think if i went fiddling with it again, i would lose my rag and lob it in the river! But ure ideas are all noted don't worry, so keep them coming!

Thanks

Charlie

jam125 · Borekit Bruiser Joined: 14 Jan 2006 Karma :

the only time my cg has run like that and stoped was when i got the ignition switch wet i sorted that with wd40 might be worth a try and make sure the wire that stops the coil working isnt earthing out

charlie1985 · L Plate Warrior Joined: 02 Jun 2006 Karma :

Hi guys, tonight i have drained the oil, cleaned the oil filter gauze, there were a few metal shards in there but nothing mega. I can't get at the centrifugal oil filter, damn screws are far to tight for my puny screwdriver. Ermm, i drained the fuel, and im not happy with the fuel tap at all, when in the on position, it has got a really random flow and i cant get at the fuel filter gauze coz the alan screws are knackered, so im gonna buy a new fuel tap.
Apart from that, i set up the valve clearances properly and checked the points, both perfect. Bad news is the sump thread is knackered, and 1 of the threads in the rocker cover is knackered. Is it worth having these tapped, or is lock tight and witness marks the cheap and fast option, perhaps even sum locking wire on the sump plug? Whats every1's opionion on my stripped threads. Think i'll have the running problem sorted soon.

Many Thanks Charlie

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Try chasing a greased tap through the dodgy threads in the spirit of optimism.

If you are up to it, see if there is enough meat to drill and tap the holes out to the next size up.

If you want to be cheap about it and don't mind a bodge. Epoxy them in with a product called JB weld (if you want to be a little less bodge-tastic, JB weld takes a tap just fine once it is set).

Drill the heads off the screws on the fuel tap, there should be just enough left to get mole grips on. If not, you haven't lost anything.

Sounds like you were sold a bit of a lemon.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.