Cracked BarrelBroken cam chain, smashed cases?
"Peanut" SL125, 1972/3 rebuild
- Thread starter Laava
- Start date
I wouldn't think so. I know they were prone to sloppy cam chains and would wear away at the cylinder castings but it would also have to displace the camchain guides and tensioner to do that? Given that it has been fixed, prob wont be obvious what actually happened...new barrels are easy to get in any event, big bore as well...Cracked Barrel
Exige is a big bore....I wouldn't think so. I know they were prone to sloppy cam chains and would wear away at the cylinder castings but it would also have to displace the camchain guides and tensioner to do that? Given that it has been fixed, prob wont be obvious what actually happened...new barrels are easy to get in any event, big bore as well...
Thank you me lil buddyExige is a big bore....machine
That's a nice cheese, not sure you can still find it though.Cracked Barrel
Right so pulled the heads and barrells off. Grandads innards were seized with gunge. I poured a bit of wd40 in there and started on Peanuts engine. It came apart properly and then I could view the damage. It looks to me like at some point the front cam chain guide has been steering the chain sideways into the barrell and crankcase where it has had quite a feed at some point. This was in the distant past and was operating normally prior to this stripdown. Grandads camchain at some point has done similar but only a small amount of wear. With new chains and guides, I think we are good to go!
photos 4&5 you can clearly see how much meat has been removed by the cam chain. What sort of animal keeps using a machine that must have been sounding like a concrete mixer? (Oh! Of course, a Ducati rider with a dry clutch!...) pic 3 you can see the difference in the gasket surface where the ditch chewed out in Peanuts crankcase must be 5mm deep!
photos 4&5 you can clearly see how much meat has been removed by the cam chain. What sort of animal keeps using a machine that must have been sounding like a concrete mixer? (Oh! Of course, a Ducati rider with a dry clutch!...) pic 3 you can see the difference in the gasket surface where the ditch chewed out in Peanuts crankcase must be 5mm deep!
Last edited:
On one of barrels the wear from camchain is significant, in fact this has explained the welding job on the outside of the barrell. It is astounding to think the machine was left to flog itself out like this but...
You can see in one of the photos the wear has gone right through into the cavity between chain run chamber and cylinder. There must have been oil pissing out everywhere for quite some time before the welded repair! FFS!
You can see in one of the photos the wear has gone right through into the cavity between chain run chamber and cylinder. There must have been oil pissing out everywhere for quite some time before the welded repair! FFS!
Hey!!! Its a honda!!! Youl be fine...
Yeah man! It was like that when I bought it and I used it for a bit!...🏍🏍🏍
I bet you used the multi tool didnt ya!!!
Is AirCon a 'Multi'-Tool
Had to remove gearbox layshaft bearing. It is the only one in a blind hole. Daughter in law, who is a bike mech apprentice, came round with a set of blind bearing pullers. Prob is there is an oil feed noozle poking up from the bottom of the hole and it prevents the puller from going in far enough! I fucked around with this for ages, swore, cried, consoled, went to Honda shop all to no avail although the honda mech did say, " heat it up to buggery and drop it on the ground"
Taking his heat notion on board, I made a tool and after a few attempts, using a slide hammer as well, it popped out. I did the other engine too, just so I can thoroughly flush it all out, oil galleries incl...
Taking his heat notion on board, I made a tool and after a few attempts, using a slide hammer as well, it popped out. I did the other engine too, just so I can thoroughly flush it all out, oil galleries incl...
Very clever!!! Good stuff..
My day didnt go so well. A visit to vtnz and 2 hours on the phone to the nzta has left me very pissed off...
Yup.. long story now... i l tell ya about it one day...
I just came across this thread and find it really interesting. I had two Honda SL125s in the late 70's / early 80's. The first one was a '74 that I bought as pile of bits that I assembled in my kitchen. It was fun getting the fully built up bike down three flights of stairs once it was completed , although much easier that the Ariel NH350 that I did next 
. It was a nice wee bike that ran well and I used it mainly to ride to work for the next year or so before it was unfortunately stolen. A year or so later I got another one, a '75 reg this time. I can't remember its origins but it couldn't have been expensive. I used this one as fun bike, taking it off road a few times and sold it a few years later.
This picture was taken about Jan 1983 when a friend and I took a run over some local hills. He was on a 185 Suzuki that's leaning against the cairn.
, although much easier that the Ariel NH350 that I did next . It was a nice wee bike that ran well and I used it mainly to ride to work for the next year or so before it was unfortunately stolen. A year or so later I got another one, a '75 reg this time. I can't remember its origins but it couldn't have been expensive. I used this one as fun bike, taking it off road a few times and sold it a few years later.This picture was taken about Jan 1983 when a friend and I took a run over some local hills. He was on a 185 Suzuki that's leaning against the cairn.
Cool, which hill @Derek one of the Glens?I just came across this thread and find it really interesting. I had two Honda SL125s in the late 70's / early 80's. The first one was a '74 that I bought as pile of bits that I assembled in my kitchen. It was fun getting the fully built up bike down three flights of stairs once it was completed
This picture was taken about Jan 1983 when a friend and I took a run over some local hills. He was on a 185 Suzuki that's leaning against the cairn.
View attachment 29998
No. It is Balluderon Hill in the Sidlaws, about 5 miles out of Dundee. The ordance map puts the cairn at 397 metres. We rode from Dundee over the Sidlaws to Glamis then back by road. A round trip of about 20 miles with about 7or 8 miles off road. I remember it was bloody cold. Looks like I'm warming my hands on the engine here.
Doesn't look the warmest, and in 1983 clothes weren't 'technical' so cold hands would be the norm
Ooh an old Honda build .. how did I miss that. Nice work
I use lap mops on a bench grinder for the fork lowers . Works a treat and quick . For a longer lasting finish use a Wash Primer then clearcoat
But you haven't got a wife