CG 150 project build....

[stonesie]

I thought some might be interested in my tinkerings as I'm a natural fiddler with anything to do with engines For a while I was building car/van engines for a living and used to be a mechanic, when my dad was into bikes (1960's) he constantly had his Honda 305 in bits making improvements so I suppose it's in the blood...

Anyhow, on with the project

I bought a CG150 liner/piston set from Ebay before I read into it properly so the search was on for a spare CG engine to strip and have machined to accept the bigger barrel.

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=160471656382&ssPageName=STRK:MEWNX:IT
Slightly incomplete but a stator cover and kick start/gear levers should be easy enough to find, the guy took a straight £20 for it and his son fell in love with my old car

So, time to attack it with my air powered ''universal torque wrench'' (MAC tools twin hammer impact gun )

https://img844.imageshack.us/img844/9012/dscf0117n.jpg

Some bugger has been here before...
https://img826.imageshack.us/img826/6493/dscf0116b.jpg

The Right Tool For The Right Job!!! avoids this un-pleasantness
https://img97.imageshack.us/img97/974/dscf0118f.jpg
Stainless replacement bolts have been ordered for the re-build....

[stonesie]

https://img29.imageshack.us/img29/1692/dscf0119d.jpg

Everything looks really good in here, the guts were just removed and stored for now..

https://img838.imageshack.us/img838/861/dscf0120o.jpg

Big box-o-bits
https://img259.imageshack.us/img259/1852/dscf0124m.jpg

Then the crank case went for a week's holiday at Arrow Engineering as recommended by my preferred engineering company who unfortunately did not have the type of milling machine needed for this, £40 later it was time to clean it up and get that black brushed-on paint off,
https://www.partridgeshadleigh.co.uk/catalog/images/245143_Nitro_Mors_1000.jpg
Fantastic stuff, but my rubber gloves were next to useless with it, a good dollop of caution is needed and it's left a few little bits but the dremel/wire brush will sort those.
It now looks like this.
https://img689.imageshack.us/img689/4792/dscf0125tg.jpg
https://img256.imageshack.us/img256/3784/dscf0126uf.jpg
https://img840.imageshack.us/img840/1039/dscf0127u.jpg
https://img716.imageshack.us/img716/1574/dscf0129p.jpg
That last bit might need building back up slightly but I will see how it goes.

The next job is to replace the bearings, they got a bit of swarf in them and are lumpy, despite being blasted out with various things, a local bearing company say they should have these bearings on stock and there's a gearbox company just down the road who should remove the old blind bearings for a few beer tokens, I don't own a blind bearing puller

[N cee thirty]

look forward to see how it gets on
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[stonesie]

I want mega powa and 100mph init



Seriously, the head is being left alone really for simplicity so I'm expecting a good boost in mid range torque and maybe a bit more grunt in 5th, the engine it has now makes some really startling noises once it is warmed through but is silent in 2nd so when this lump is fitted for running in the other engine will be pulled apart, Inspected/repaired and then the bike will be up for sale with a choice of capacity's. The left over engine will then be sold as re-conditioned


All penny's in the pot for a proper bike, SV650 is top of the short list so far.

[number_two]

"I'm on board!"

CG150=16bhp??

[stonesie]

About 12-13bhp would be an improvement to be fair, but today I spotted a potential problem... The engine number has been made un-readable so the history of this engine is in doubt and I'm wondering what I can do about it.

[CHR15]

[Mac_Black]

As a big CG fan I'm loving this thread already, keep it up!

[number_two]

As above, delete if possible or re stamp it with the original lettering if you can make it out. takes some detective work though.

[Welshd1k]

one of these kits?
https://cgi.ebay.co.uk/New-cg150-cylinder-block-Replacement-cg125-Enhance-/270628875330?pt=UK_Motorcycle_Parts&hash=item3f02bcec42


looskeasy enought might get me a cg for a laugh
____________________
Current >Cb600fx hornet, ns125rk90 21.7bhp@wheel<
Sold >,zxr400 h2 (33bhp kit) rd350 n1 rd350 lc2<

[stonesie]

Yeah that's the one

Will update with more progress when I make some...

[pepperami]

Lots of write-up and buckets of photos please
____________________
I am the sum total of my own existence, what went before makes me who I am now!

[pepperami]

We`re waiting!
____________________
I am the sum total of my own existence, what went before makes me who I am now!

[satelliteone]

ooerr.. im watchin with interest.

I have just ported a chinki clone CG known as the GY125..

i have been looking at 4T figures..

have a look at this power house!


https://www.youtube.com/watch?v=PsEFKYULNDc&feature=related

[N cee thirty]

any updates ?
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[The Artist]

[stonesie]

Update..... sorry fellas there is nothing to report, caseings are still waiting to have the blind bearings replaced, the gearbox place has had them for a couple of weeks now so i think a visit is in order.



I have an SV650 and love it so i guess thats taken some urgency out of it for me but the honda will be done and used over winter.

[N cee thirty]

any updates ?
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[kingsknight]

any update chap? iv been following this since the start!
____________________
TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[stonesie]

The guy at the gearbox place is being difficult, being a family friend apparantly means my "10 minuites work" (his words) is being saved for when every thing else is done, the workshop re-painted and he cant be bothered with another cuppa.

I've never known anyone in the motor trade turn down a cuppa

Will have to give him a call tomorrow..... Again...



On the other hand I have not started stripping the CG yet so I took it out in the snow last week, much fun

[N cee thirty]

any updates ?









____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[stonesie]

Nope, got the engine bits back last week and when i get time i will start to put things back together.

[dextersaurus]

Had the time yet?

[Frost]

It'd be really good to see just how much power can be got out of a CG. Big bore, different cams and timing, skin head, flow things, bigger carb, supercharger?

[Welshd1k]

about 3bhp ....

my rxs will still be faster and my ns125 even faster . so pointless
____________________
Current >Cb600fx hornet, ns125rk90 21.7bhp@wheel<
Sold >,zxr400 h2 (33bhp kit) rd350 n1 rd350 lc2<