|
|
| Author |
Message |
| JackDaniels |
This post is not being displayed .
|
JackDaniels
Trackday Trickster
Joined: 26 Aug 2010
Karma :  
|
 Posted: 20:27 - 12 Mar 2011  Post subject: Honda Custom CM125 |
 |
|
Ive Just Bought One Of These Has Anyone Got Any Experiance. its a 1984 
https://i52.tinypic.com/21mem0x.jpg
____________________
THEORY TEST - PASSED! - 02-08-11 CBT Passed - 09-08-10 MOD 1 - 09-08-2011 - MOD 2 - 28-09-2011
2006 Yamaha JOGRR>2010 Yamaha Ybr>1995 Honda CB400 Superfour >2005 Honda hornet>1999 Suzuki Bandit 1200 > 2002 BMW R1150GS > 2013 Tiger Sport 1050 > 2007 GSXR 1000 > 2005 GS500E |
|
| Back to top |
  |
You must be logged in to rate posts |
|
 |
| SpannerMonkey |
This post is not being displayed .
|
SpannerMonkey
World Chat Champion
Joined: 26 Aug 2010
Karma : 
|
|
| Back to top |
 |
You must be logged in to rate posts |
|
|
| tvchimp |
This post is not being displayed .
|
tvchimp
World Chat Champion
Joined: 29 Sep 2009
Karma : 
|
| Posted: 20:47 - 12 Mar 2011 Post subject: |
|
|
Looks like a Yamaha SR125... Pretty much identical.
I had a few clutch lessons on the SR125 last week, due to me getting my cb100 swapping from my moped (Instructor said I had perfect clutch control btw  ) and found the seat, although comfy and supportive, the position of the bar's was a little odd, and I found myself really wanting to rest my arms on something.. The 'monkey-arm' syndrome is what I like to call how my arms felt within 5 minutes of having my hands on the grips. 
____________________
Bike: Currently Bikeless... Gahh |
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| N cee thirty |
This post is not being displayed because the poster is banned. Unhide this post / all posts.
|
N cee thirty
Banned
Joined: 31 Jan 2010
Karma : 
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| The Shaggy D.A. |
This post is not being displayed .
|
The Shaggy D.A.
Super Spammer
Joined: 12 Sep 2008
Karma : 
|
| Posted: 20:53 - 12 Mar 2011 Post subject: |
|
|
I think the CM has the same 360 degree crank as the CD, with a single carb, whereas the CB is a 180 degree with twin carb. Maybe.
____________________
Chances are quite high you are not in my Monkeysphere, and I don't care about you. Don't take it personally.
Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5 |
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| Teflon-Mike |
This post is not being displayed .
|
Teflon-Mike
tl;dr
Joined: 01 Jun 2010
Karma : 
|
| Posted: 21:11 - 12 Mar 2011 Post subject: |
|
|
| rob yarrr wrote: | same engine as a cb ? |
| The Shaggy D.A. wrote: | I think the CM has the same 360 degree crank as the CD, with a single carb, whereas the CB is a 180 degree with twin carb. Maybe. |
Shaggy wins the wine gum!
CM has the Benly engine with 360 crank, and single carb, though in the CM's case, where the Benley got either a slide carb or a 'propper' CV on later models, the CM got stuffed with a bizare, cantankerouse and generally chitty Vairable Venturi item.
Ignition system, including the Generator windings, is different to the CB too. CB has to have a 'double' ignition system, one for each pot, to provide sparks at 180 deg intervals.
System comprises a winding in the generator, an induction trigger in the mag casing, CDi unit and coil... I have been checking carefully this weekend..... I was wondering whether the Corporal's lack of performance was due to it having a CM motor, rather than a CB engine...... looks like its a genuine CB engine, and just phucked!
Still got more 'go' than a CM, though.
Incredibly, they are as heavy as the Super Dream, which was criticized by the standards of the day for its weight.
Yet the Benley engine, which is two BHP down as stock from the Super Dream, was de tuned FURTHER to a mere 9bhp LESS than a CG125! for the CM125 'Rebel' Cruiser!
It was also down geared so it would stand some chance of shifting that added wight off the line!
When new, they were a 'girlie bike', becouse of the low seat and electric start. Few 125's back then had an e boot.
Now, they have ONE endearing quality.....
They are dirt cheap!
Many of them broken to offer their engines to dead CB125's!
As cheap wheels, you could do worse.
BUT if you want it to keep running, change the oil frequently, and every other oil change, remove the clutch side engine cover, and clean the oil strainer. Also adjust the cam chain tensioner hidden underneath the carburettor manifold, and the tappets in the rocker cover.
Plenty have the daft idea that sticking CB125 carburettors on them will make them hugely faster.... don't be fooled, its that 360 crank and all teh associated bits around it that limit the power. The 180 crank was introcuded for the CB motor so it could rev more highly without shaking itself to bits!
CB engine WILL go into the frame though, but carburettor location and exhausts give gried finding space for them... better off just buying a whole super dream!
Only other caution, is that I dont THINK that the 'old' CM125 actually made it onto the DSA list as eligible for A2 licence, becouse of its low declared top speed, and if old and a bit worn and tired, may NOT actually get up to speeds to allow A1 eligibility if you have to argue the case.... but worth checking.
Meanwhile, as cheap wheels, for CBT, training and practice, probably saves the £30 or so you'd need to rent a school bike to do tests on, a few times over.
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
|
| Back to top |
 |
You must be logged in to rate posts |
|
|
| JackDaniels |
This post is not being displayed .
|
JackDaniels
Trackday Trickster
Joined: 26 Aug 2010
Karma :
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| Teflon-Mike |
This post is not being displayed .
|
Teflon-Mike
tl;dr
Joined: 01 Jun 2010
Karma :
|
| Posted: 23:51 - 12 Mar 2011 Post subject: |
|
|
| jogrr1994 wrote: | I took it to westonzoyland airdrome today, well dad rode it over and i followed on my bike, i had a go on it and got about 65mph wich i didnt think to be too bad for the age, dad said that would be a crusing speed of around 55 |
Sounds fairly healthy.
Think the book gives them about 62 or something, which sort of corresponds with the power curve and gearing, so 65 on the clock would not be unreasonable.
As said, its about the power and speed of a CG125.
Added weight and cruisery steering geometry, makes them a tad more stable.
Twin pot motor makes them less 'harsh' & generally better composed.
Single carb means they are just as ecconomical.
They are a better built bike, too.
For the money, its a heck of a lot of bike, compared to similar performance CG, if you dont mind the cruisery riding possition and looks.
Only thing is its not as 'robust'.
Demands more maintenence (oil changes mainly), and punishes you more (expense!) if you dont give it it. (Top ends can sieze)
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| craigs23 |
This post is not being displayed .
|
craigs23
Mr Muscle
Joined: 08 Jun 2005
Karma :
|
Posted: 10:21 - 13 Mar 2011  Post subject: |
|
|
I had one as a first bike. Got me started, smoother than a single, interesting looks, but as a first bike, I had nothing to compare it to at the time. I've only got brief memories of the thing. Girls like the vibes when it was idling on its centre stand. I remember the piston rings needed changing as I obviously didn't understand throttle control at the time. Struggled to hit 45 going up hills, that was pretty frustrating at the time. Think I got about 60 out of mine, but obviously, as the time, I probably boasted that it topped the 90mph that it had written on the speedo. No idea what it used to do for petrol - it was about 70p a litre or so when I was a youngster, so probably got really good economy out of it.
Mine was also an infinitely more ghey in colour.
https://i3.photobucket.com/albums/y51/whers84/cm125c.jpg
Luckily, it never progressed my biking into the relms the cruiser. |
|
| Back to top |
| |
You must be logged in to rate posts |
|
 |
Old Thread Alert!
There is a gap of 191 days between these two posts... |
 |
|
| eddie F |
This post is not being displayed .
|
eddie F
L Plate Warrior
Joined: 15 Sep 2011
Karma : 
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
Old Thread Alert!
There is a gap of 307 days between these two posts... |
|
|
| Yetster |
This post is not being displayed .
|
Yetster
L Plate Warrior
Joined: 23 Jul 2012
Karma :  
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| Teflon-Mike |
This post is not being displayed .
|
Teflon-Mike
tl;dr
Joined: 01 Jun 2010
Karma :
|
Posted: 21:44 - 23 Jul 2012  Post subject: |
|
|
| Yetster wrote: | dont suppose any of you guys know if the cm engine uses the same camshaft as the cb 125 tdc? |
No it doesn't.
And No, you couldn't fit one.
Well, you could... but the valve timing on the CB cam is for an engine with 180 crank, ie one piston up, one piston down. CM Rebel & CD Benley have 360 cranks, both pistons rising and falling together.
Fit CB cam to CM/CD engine, when the pistons come up together, they will mash the valves in one or other combustion chamber that are being held open presuming the piston is falling, not rising.
Ie: wont run very well!
Next question?
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| kotachi |
This post is not being displayed .
|
kotachi
Traffic Copper
Joined: 26 Mar 2012
Karma : 
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| adamchook |
This post is not being displayed .
|
adamchook
L Plate Warrior
Joined: 05 Oct 2012
Karma :
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| matty901 |
This post is not being displayed .
|
matty901
L Plate Warrior
Joined: 15 Mar 2013
Karma :
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
Old Thread Alert!
The last post was made 12 years, 328 days ago. Instead of replying here, would creating a new thread be more useful? |
|
|
|
Help & FAQs
Search BCF
Members
Groups
Events Calendar
rating
rating