CG 1989 Vavles ?

[X9-rider]

Hi.....

I have redone the valves due to rattling again, and is now OK, but iam running out of thread on the valves, i think this is the last time i can do the valve clearance, and there nothing left of the thread to adjust .

I have looked over Google but cant seam to be able to find out where u by the valve parts from ?

Anyone know ?

Look at image below the part i need, is the thread type screw thing at top of rocker arm top of valve, you turn it to make the gap smaller or bigger, part above locking nut.

https://i.ytimg.com/vi/pgZymnFuMe0/hqdefault.jpg

[pepperami]

Maybe a Honda dealer?
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[X9-rider]

Rather buy online. could use local deller Dyrons york road, but would some time its cheaper online. Does anyone know the propa name for the part i need ?

[kt]

I havent seen the other threads but if you are having to readjust the valve clearances constantly it sounds to me like the hardened faces have worn of the camshaft and/or your pushrods are worn out. Your problem is not in the cylinder head alone.

[Teflon-Mike]

[X9-rider]

[kt]

All 4t motorcycles have a cam of some description , your engine is of the overhead valve design and most certainly does have a cam which normally wears badly when oil changes are neglected.

[X9-rider]

Well doing an oil change on Wednesday ill take some picture when i strip engine down see if people can see some thing bad or worn.


Anyone know a good site to buy engine parts from . for CGS ?

[kt]

Op, to be honest I dont think your engine is woth any sort of repair, sounds to me like its either been run with low oil or has had infrequent oil changes, this will result in the whole engine suffering extensive mechanical wear. The piston and rings will be worn badly but the cam in these bikes is a weak point and i.m.o if you are going to carry out a repair you will need 1/ pushrods 2/rocker arms 3/ new tappets 4/ camshaft 5/rebore 6/new piston and rings. the bottom half of these engines are very strong and rarely suffer damage but it would be cheaper for you to get another engine. Is there any metal in your oil filter?

[X9-rider]

Last time i checked there was only dirt in the oil filter, when i check Wednesday ill check the filter mesh. it just need to be up and runing to pass my test.

Thats all iam bothered, needs to be kept running till passed MOD 1 + MOD 2,

[X9-rider]

Also going to order new chain and sprocket, what size sprocket should i use ?

Available for the CG BR-J are : 14t 15t 16t 17t ?

[Teflon-Mike]

[kt]

You can come and bang your head of my brick wall anytime

[X9-rider]

like i said, just need to keep it going for a few more weeks till i past my test, Monye i have is for test, if i blow it all on new engine parts, i wont be able to do my test for a while. Next test is Thursday.

The oil is Black so needs changing, chain wont stop going lose. So think if i sort the chain out and new oil, should get me throw my test next week with out blowing all my saved cash on new CG parts ? its just needs to keep going, then if it blows up after i have my full license, i wouldn't care either way.

[Teflon-Mike]

[hondapartsman]

I can see where you're coming from, just in case you don't pass your test though be aware that new parts could cost you easily a couple of hundred quid and you'll need someone who knows what they're doing to do the engine for you. There were some cam problems with the CG series but generally if you change the oil regularly then they ought to keep going and going, at least until the rings wear out. I would think if you don't pass your test and have to carry on using it a second hand engine would be your best bet, I wonder if anyone has tried using one of the copy ones in a proper Honda? Might be worth a try, they're more variable in quality as far as I can see but that means there are good ones. The might HMC are getting more and more parts made in China so quality must be improving, in fact there seem more parts come up made outside Japan than in as far as I can see these days (and I do see, I've been involved in Honda parts all my life, if the name doesn't give you a clue) I've even toyed with the idea of buying one of these copies myself and running it while, I have had a few on my hands but only short term and not on the road as I was doing favours for other people. That's another story though and something I ought to have known better than to try. Maybe one day I'll have few hundred to spare and will find something second hand and give it a try, I like a challenge if keeping my own old and decrepit bikes is not enough of one.
Anyway, sorry to go on, good luck with the test though.
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[Robby]

Ignore the doom. You still have some thread left on those adjusters, keep adjusting until you run out of thread and then swap the engine.

[X9-rider]

I can still do test on it, still runs, still does 65mph, no power lose, just the valve thread ruining out and chain keeps going lose. Besides that its not really a doomed bike. Just minor work.

As for money no sorry i dint mean to come across as skint guy, i come out with a OK wage, i spend most of my wage on other hobbies and activity out of the 1,129 wage i prob get 835 to keep to my self. i could buy a new bike but tbh whats point when soon as test done it will be sold so a waste. Or new engine, due to my job, would not have that time to remove and refit an new engine and is it worth it would i reclaim it in sale of the bike ?

What i have thought about tho, getting a nice bigger bike to sit outside to admire LOL to keep me aiming for that Test pass and not give up?????? Is that a good idea ?

[Fisty]

May I suggest you use this....

https://boingboing.net/images/flowchart-2007.png
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Fatter and faster than Fret

[X9-rider]

LOL that's quite funny.... dear i say helpful LOL

re- did the valves this morning after leaving it for a whole day to cool, no rattling sound now ok ill admit i been doing the valves while the CG been still abit warm.

Is running OK just that dam oil is black as a ......well you know where i was going with that.......

[.]

Your valve clearance gap is getting smaller right? probably the exhaust more than the inlet?
So either your single cam lobe is growing, both pushrods are getting longer OR my guess is that either the valves stems are stretching or the valves themselves are receding into the head allowing the valve stem tip to move closer to the end of the adjuster, thus decreasing your valve tip clearance.

When your adjusting screws no longer protrude enough to sit on the valve stem tip and the underside of the rocker arm makes contact with the valve spring collar you will be forced to undertake some major overhaul work. You will also risk the screw itself being forced out of the rocker arm as there are insufficient threads to secure it and any damage a loose adjusting screw and lock nut will cause whilst bouncing around.

What you could do as a temporary fix is to raise the height of the rocker arms themselves by placing some shims or thin washers underneath the support plate which is bolted down onto the cylinder head, this will increase your valve stem clearance, but will not solve ultimately solve your problem. When the time comes if it needs new valve seats it might be cheaper to fit a good second hand head. If its only the valves, they can be replaced for around £20 the pair and a couple of quid for some new stem seals and a whatever a new head gasket costs.

[kt]

Op, considering the age and mileage of your bike you will need to be changing the oil with quality stuff every 1k miles maximum and remember that when you are checking your oil level that you DO NOT screw the dipstick in but only set it in on its threads to check the level as this will make a big difference in the amount of oil in the engine.

[MarkJ]

[kt]

I change the oil on all my Hondas every 1k miles regardless of mileage or age, its the cheapest and best maintenance that can be done to any bike i.m.o and saves a lot of hassle and money as the bikes get a few miles on them. I also glue a magnet to the sump bolt of the smaller Hondas as their mesh thimble oil filters are too coarse and only catch the larger pieces of metal in the oil. Even a cg 125 will die at low mileages if the oil is not changed frequently as they hold very little oil to start with and in particular the models with the lean burn carb fitted as the engine tends to run hotter on these models.

[X9-rider]

HI

Well i replaced my CG Tappet adjuster screws today, and reset the valves, and toke the CG out for a spin. The Tappet adjuster screw once removed and looked at carefully, the bottom was all dented and chipped

Result: CG now hits 65mph ( confirmed ) and if i hold it in 5th till almost red line, i can get 70mph |( confirmed ) This was on the Flat.