CG125 OHV Build Oddessy

Re: CG125 Decaf - still potching about.

Hey man, new member here. Loving your build, came across it as I'm attempting my own build. I've got a CG125 and looking to turn it into a flat tracker/trials thingy.

I'm having a bit of trouble with the electrics, I attempted to replace the battery with a capacitator and it starts and runs fine but the indicator won't flash when idling. Once you kick up the revs it is fine but there just isn't enough juice to operate everything at idle. Would be interested to see how you get on with yours as you seem to have modified the wiring a bit more than me. Keep up the good work, looking forward to updates.
 
Re: CG125 Decaf - still potching about.

Meegulthwarp said:
Hey man, new member here. Loving your build, came across it as I'm attempting my own build. I've got a CG125 and looking to turn it into a flat tracker/trials thingy.

I'm having a bit of trouble with the electrics, I attempted to replace the battery with a capacitator and it starts and runs fine but the indicator won't flash when idling. Once you kick up the revs it is fine but there just isn't enough juice to operate everything at idle. Would be interested to see how you get on with yours as you seem to have modified the wiring a bit more than me. Keep up the good work, looking forward to updates.
Click to expand...

Hey!
What year is yours? is it the points engine or CDI? If you want a Haynes manual I can email you one.
I tried the capacitor thing and gave up, turned out the reg was knackered, but I've kept it squirrelled away incase I have another go. I'm not revisiting the lights until I do the frame swap. I've amassed everything I need apart from headlight brackets and a headlight bulb, other wise I'm good to go (i hope) for a batteryless system running head, tail and brake lights only. It's all a bit of a dark art to me.
I'm currently waiting on some swept back handlebar risers so I can lower the XL forks in the trees to get a less giraffe like stance. Have you started a build thread on here yet?
 
Re: CG125 Decaf - still potching about.

Erskine said:
Hey!
What year is yours? is it the points engine or CDI? If you want a Haynes manual I can email you one.
I tried the capacitor thing and gave up, turned out the reg was knackered, but I've kept it squirrelled away incase I have another go. I'm not revisiting the lights until I do the frame swap. I've amassed everything I need apart from headlight brackets and a headlight bulb, other wise I'm good to go (i hope) for a batteryless system running head, tail and brake lights only. It's all a bit of a dark art to me.
I'm currently waiting on some swept back handlebar risers so I can lower the XL forks in the trees to get a less giraffe like stance. Have you started a build thread on here yet?
Click to expand...

It is a CG125 W, 2001 CDI kickstart model and I believe it is the last batch before the moved operations to Brazil. I'd love a Haynes manual, been searching everywhere for one. I've not started a build thread as the only mod I've done so far is remove the air box and put a K+N type filter + 110 main jet. Still need to sort out the slow/pilot jet as it is a bit rough low down.

The main reason for the modding is the fact that I live in mid Devon and the lanes here are covered in mud and slick like ice. I need some chunky tyres asap. I just came off the bike today attempting to give way to a truck on a muddy corner.

Electrics were never my strong points, but if I have a manual that should clear things up. Hopefully I'll get a batteryless system in place soon. I think LED has a lower draw but would mean I need a transformer thingy.

I love that skateboard seat you had, I gotta have a go with that, I think I spotted an old one lying around somewhere.
 
Re: CG125 Decaf - still potching about.

Hey Meegulthwarp
I'm in south Somerset, and dealing with the same muddy roads.
PM me your email address and I'll get a manual over to you.
The carburration on these is counter intuitive, I'm running a k&n on a standard main jet - 95
and had to RAISE the clip on the needle i.e. weaken the mixture. Lots of peops on here with the CB125's have found the same.
This really cleaned the pick up low revs, however the clincher was getting a race CDI, about 15 quid off evilbay.
http://www.ooracing.com/store/index.php?act=viewProd&productId=3623
Just check the configuration of your pins, and it's plug and play. Give a nice response.
My seat is away being up holstered so I'm looking forward to seeing what it turns out like.
Your bike is the last of the jap ones and the highest build quality Honda achieved.
 
Re: CG125 Decaf - still potching about.

Yep, living in 'dairy country', that ain't just 'mud' on the road ;D
 
Re: CG125 Decaf - still potching about.

crazypj said:
Yep, living in 'dairy country', that ain't just 'mud' on the road ;D
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Where I am now there is a big difference between the lanes where cattle are moved and where horses are exercised. Horse shit is pretty fibrous and grippy where as cow shit is, well, slippy as shit. Knobblies are pretty much a must have.
 
Re: CG125 Decaf - still potching about.

Erskine said:
Where I am now there is a big difference between the lanes where cattle are moved and where horses are exercised. Horse shit is pretty fibrous and grippy where as cow shit is, well, slippy as shit. Knobblies are pretty much a must have.
Click to expand...

LOL ;D
 
Re: CG125 Decaf - still potching about.

Erskine said:
Hey Meegulthwarp
I'm in south Somerset, and dealing with the same muddy roads.
PM me your email address and I'll get a manual over to you.
The carburration on these is counter intuitive, I'm running a k&n on a standard main jet - 95
and had to RAISE the clip on the needle i.e. weaken the mixture. Lots of peops on here with the CB125's have found the same.
This really cleaned the pick up low revs, however the clincher was getting a race CDI, about 15 quid off evilbay.
Click to expand...

Sent you a PM.

I rasied the clip with the stock jet and K+N but it had no power on revs, with 110 it has pleanty of oomph 2000RPM + but getting to 2000RPM is a struggle when cold. I figured a richer slow jet would fix this as the plug looks lean. The stock main jet was 88 oddly enough. The carb is a 26mm Keihin.

That race CDI looks tempting. Gonna be next on my list after knobblies. Anyone know of a good road legal knobbly to stick on a CG125? 18" front and back.
 
Re: CG125 Decaf - still potching about.

These aren't trials tyres but they are half way there and you can get them as a matching pair, I assume your model has the later 18" rear? Good price too.
http://www.smprowheels.co.uk/tyres/tyres-road/mitas-motorcycle-tyres/mitas-h03.html
?
 
Re: CG125 Decaf - still potching about.

This evening I single handedly took off the tyre on the 'new' rear wheel with the aid of a chuffing great big pry bar, two screw drivers and a couple of tie wraps. I know some of you guys can probably peel a tyre off with your teeth and one hand tied behind your back, but for me this was quite an achievement and I only lacerated the tube in about half a dozen places.

P1030904.jpg



I drilled a hole for a tyre clamp so I can run it low pressure.
The rim is not the original Honda item and it has been laced on with some pretty serious looking butted spokes which I've not come across on any other 125 wheels.
 
Re: CG125 Decaf - still potching about.

I've asked Admin to move this thread over to the new 'Specials' section, so see y'all in there :)
 
Re: CG125 Decaf - trials

Some swept back handlebar risers arrived today......
I need to lower the new XL forks about 2" to give the new frame a less giraffe like stance, and the standard risers will only give me about 3/4"

P1030930.jpg
 
Re: CG125 Decaf - trials

My seat was dropped off today ........... completely chuffed at the great job, turned out really well for a skate deck

P1030931.jpg


P1030933.jpg


I sold a rake of stuff on evilbay so shocks will be on order soon, slowly slowly catchee monkey :)
 
Re: CG125 Decaf - trials

Meegulthwarp said:
Nice clean job they did. What material did you use for the "cover"?
Click to expand...

Said she used car seat vinyl, I'm just glad she didn't do it in pink like she was threatening to.
 
Re: CG125 Decaf - trials

Well I've reached the point where everything is amassed to do the frame swap and revamp ......
It means taking the bike out of commission which I hate to do, but as the saying goes "you can't make an omelette without breaking eggs".
Until the new forks are properly on I can't see how much I need to re position the tank which in turn dictates where the seat needs to be attached which in turn dictates the rear mudguard mounting.
Argh!
 
Re: CG125 Decaf - trials

Cheers. I was going to start today, I got as far as drifting the bottom race off the new triple tree then bottled out.
Went for a spin instead and ran the carb dry when I got home. Got caught up worrying about where/how to relocate the coil cos there will not be room on the top tube once the tank is repositioned.
 
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