lingeringstin...
Trackday Trickster
Joined: 01 May 2014
Karma :  
|
|
stevo as b4
World Chat Champion
Joined: 17 Jul 2003
Karma :
|
|
Teflon-Mike
tl;dr
Joined: 01 Jun 2010
Karma : 
|
 Posted: 03:47 - 23 Jul 2017  Post subject: |
 |
|
The five speed cluster wont fit in the 4-speed crank cases, AFAIK.
Not sure about the other ways about.
| stevo as b4 wrote: | If you have a 5speed I would stick with it, as not only are most Honda twins quite revvy, |
I have a feeling the 4-speed was only used on the CM/CD185 & 200... they are far from 'revvy! Peak power's about 8.5K OTMH, a push-rod CG is a bit of a screamer by comparison!
The 125's all have five cog boxed, and the 180 crank CB's are probably the revviest; red-lines at 12-13K and you can take them off the clock in the lower cogs, they seem happy enough to about 14K.
These, with both extra revs and extra power, should benefit from the 5-speed more than the others, where 5th is pretty much an over-drive.. but I'm a bit sanguine on it... 5th is a tad too tall to be all that much use very often; you have to thrash the knackers out of them in 4th to get them to top out at about 70, then you might pick up a couple of mph in 5th.
I dont think any of the big bore Benleys make peak power at five figure rpms, ad the soft cam profile does endow them with a pretty beefy low and mid-range; the CD200 motor I had in one of the S-D's for a while, with pretty wide spaced 4-speed, matched its poke pretty well, and didn't suffer from lack of a 5th.
____________________
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?' |
|
Petemate
Trackday Trickster
Joined: 13 Nov 2015
Karma : 
|
Posted: 11:51 - 24 Jul 2017  Post subject: |
|
|
A Plus 1 on all the points made in Tef's post. I am assuming that as the transmissions in both the 125s and the 233s are largely identical, they are designed to cope with the awesome (sarcasm lol) power of the 233, so the 125 should last forever given regular oil changes and gentle use when gear-changing. My own LA250 suffered, before I acquired it, from catastrophic 3rd gear failure (2 1/2 teeth off one of the cogs), presumably from bad operation from a PO, as the remainder of the engine looked very good, inc. ring gaps etc. No appreciable oil consumption. The transmission developed a whine in 4th soon after I put it back on the road after replacing the pair of 3rd gears, and I then obtained a low mileage transmission assembly from Germany and fitted it all except the 3rd gears. No problems since. I regularly wring the neck of this poor little bike, and I do find that it can achieve almost as much speed in 4th as 5th.
Sorry - just realised I hijacked the original topic. So - back to the Benly. Regarding the parts interchangeability - simple, on to the CMSL website and with the wordpad facility, check out which parts fit both models. then there is a good idea of what fits what.
____________________
82 not out....1983 Honda LA250 Custom
2008 Saab 9-3 1.9 Tid 150 Vector Sport estate
2005 Stirling Eccles Topaz 2-berth |
|
Help & FAQs
Search BCF
Members
Groups
Events Calendar
rating
rating