T120R Bottom end rebuild part 1
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- Опубликовано: 12 сен 2024
- My new web site lunmad.com/
Argh! first off I've had loads of hassle with editing software the windows movie maker gave up the ghost so I am using different software, a whole new learning curve! Hopefully it'll turn out all right, two days upto now and I have only got one rocker box off. Sorted now so I can crack on with the job.
The last time I did the bottom end was in 1994 around 90,000 miles ago, it got all new bearings two new con rods and a new set of barrels with 10.5:1 pistons I did not re-grind the crank as by eye and feel it was acceptable to me just to renew the big end shells I also fitted a new clutch and primary chain.
Back to 2011 and this rebuild, I noticed my oil warning light flashed a few times on my previous journey over the Dales, the weather had been hot and my rpm around 4-5000 most of the time but when getting down to around 2000rpm I noticed the oil light gave a few flashes this said to me it was time to have a look again at the bottom end.
This video starts with a short intro of the "why's and what for's" and then onto draining the oil from the frame, disconnecting the battery then onto removing the fuel tank, rear foot rests and exhausts I then take a look around the motor looking for tell tale oil leaks around the rocker boxes, cylinder head and push rod tubes, also checking around the crank, primary, timing and gear box casings. Then onto draining the oil from the crankcase and removing carburettors, clutch cable from handle bar lever suppressor caps and the rocker oil feed pipe then the head steady ending with the removal of the rocker box inspection caps.
RIP John. Your videos are superb and will keep your memory alive for a long time.
Brilliant..I couldn't of rebuilt my 1971 T120 earlier this year without your help lunmad!! It started second kick and is still ok apart from running a bit rich. Lookin forward to these new vids. CHEERS!!!
RIP Lunmad, You are indeed missed, but your knowledge will go on forever!
Getting started on 1968 Triumph 120R Bonneville. You are a Godsend! Thank you.
Thank You Lunmad!!!! I have a 1971 T120R and you are brilliant! Your tutorials have helped me out of a tight spot several times.. I just want to express my deepest appreciation.
Give me your e-mail address. I too have a71 t120 tiger
I saw my 72tr6r the other day, got talking to the new owner it wasn't the guy I sold to. Anyway the bike looks how I sold it and sounds fantastic the engine still runs like it was meant and the "pea-shooters" sound like a Triumph should when he accelerated away from me... )) new owner is really chuffed, no oil leaks my old 650 was ran hard and still does!!small weep from intake rocker box was all.. )) I was so pleased it still runs and is not bobbed or chopped up.
+Jonathan Dickson
Hi Jonathan :-)
It's great to see these things ridden as was intended, there are far too many trailer queens for my liking.
Ridden not hidden is the way forward.
Enjoyed every minute, your observations and comments are worth their weight in gold.
Well done. Nice to see a Bonnie being ridden not hidden.
Hi John, Great stuff and very much appreciated!! I just picked up a '68 basket case and it needs a top and bottom rebuild. I have a feeling I will be watching these videos over and over again. Thanks again! Cheers!
Thank you so much for all of the videos! I'm in the middle of rebuilding my 73' T140V and you've saved me so much heartache and have really saved my skin on multiple occasion! Keep being awesome!
Hi Kris :-) thank you glad to be of help!
How is your rebuild going, do you plan any videos?
I'm just listening to your Tell Me Baby track, two awsomes in one post! :-)
Cheers John, I will pull the top off again and have another go. I'm thinking I missed a sharp edge or burr previously. Thanks for the feedback mate. Tim.
Hi John, your efforts are appreciated around the world. I wish I had access to this material before I restored my '70 T120 out here in the antipodes. Probably would not have helped my now pathological fear of an apparently irresolvable upper exhaust pushrod tube leak though! After having read and viewed every post and clip available, and having had 2 attempts at stemming the flow, I'm just about ready to accept installation art status for the bike in our household. Cheers, Tim.
I really enjoyed watching this- interesting how we differ in method. The rod bearings were also lightly scored on my T140 and I cleaned them up with 1000 grit emery and then polished them with a long soft rag and solvol and then purged the crank with solvent in a parts cleaner. Oil pressure is amazing now.
+Carol Kemble
Thank you I'm glad you enjoyed the vids.
I am still running this rebuild 5 years on with my two odd rods and raggy crank and she still runs strong.
Now after saving I have two new rods to go in, so a well over due crank regrind is on the cards
in fact I have just started to take the motor out to do it 15/3/16 watch this space #2 rebuild on its way :-)
Unfortunately it looks like I'm going to be doing the same thing to mine. I've watched the Lowbrow series and now I'm going to watch yours and compare notes. Thank you for sharing 👍
good stuff Lunmad, thanks for the tech videos....we Yanks need all the help we can get
You're an internet sensation! and the most useful channel on RUclips bar none!
Hi Lowrode :-) wow thank you, glad to help out cheers!
Just wanted to thank you again and wish you happy holidays .... cheers mate from Colorado... Hope you and yours are well!!!!!
Hi Infinite :-) Thank you from little old Teesside all is well this side of the pond apart from the rain! and a belated Happy new year to you and yours.
Hi Tim, I had to look up what antipodes was :-D
pushrod tube leaks are usually down to a too large a squish gap or catching the top oring when the head is put on,
Cheers from here in the podes '-)
god bless u chap.on behalf of triumph owners worldwide respect to you and your great videos.happy new year for 2013..
@VMATT500C
Hi VMA :-) thank you
I forget what the headers are as I've had them on for years, picked them up second hand
the silencers contain home made chicken-wire and fibreglass baffles.
@05clenharth
I've worked on loads of stationeries in my time when I was in the plant game,
Lister, Petter, Hatz and the like, mainly running genies, cement mixers and stuff like that.
Great simple little work horses luved em!!
great to see new vids from you.
Good old triumph they can be rebuilt time and time again just like my stationary engines, nothing like the modern crap!
Hi 1sixstring :-) thank you!
a nice 68 to work on best of luck with your project, you would be surprised how little some of these things need spending on them to get em going. Once they are going you can spend your lolly on improving them and getting them how you want em to be.
Great vid mate i'll watch all this later on tonight. thanks for post.
I had my rods lightly ground on the faces of the bearing end caps and then bolted together and machined to obtain perfect tolerances- makes a huge difference to oil pressure.
+Carol Kemble
Hi Carol :-)
Isn't it great when you have to improve stuff that should have the correct tolerances in the first place.
An old trick from the old days was to place some very thin foil behind the big end shell this has a similar effect.
Nowadays with more machine shops and spares around stuff like this need not be done, but it used to and will still have
the desired effect for worn out stuff.
@pictgroove4
Cheers pict :-)
I've had loads of hassle with editing software Grrr! and now the picture is a funny size..
.."what's all that about then?"
catch you later
Hi Ray :-) thank you Glad you enjoyed em, hopefully the pictures transcend the language barrier :-)
Any Texan words I should brush up on? pass em on, I'll start practising,
@67giacomo
Thanks giacomo :-)
there's going to be a few in this set,
I'm uploading as I do the job so I have no idea how may yet.
@VMATT500C
I must save up for a new set, I really like the look of the swept backs
Hi John, If you like a good laugh (or it could be a shock) have a look at a video called Royal Enfield bullet engine disassembly. It is so bad it's funny (unless it was your bike) I commented on their site and told them to watch you and learn how it SHOULD be done correctly. Cheers Dave
@markybyeah
Thanks Marky :-)
More to come!!
Thank you
I had bushing seizure on the little ends on my A65 because the bushings weren't reamed sufficiently. They gripped the wrist pin tighter than the conrod. Machine shop reaming is the only way to go in my book.
+Carol Kemble
Even machine shops and machinists can have bad days, if the job is done with care there is nothing wrong with doing stuff by hand.
R.I.P
Merry xmass sir. Ride safe 20019 thanks for info . Paul
Hi T T :-) Merry Christmas and a Happy New Year, though I'm a bit late, I'm just waiting for the snow to go away then ride :-D
John
@gordonemoore
Hi Gordon :-)
Happy July 4th to one and all, keep them doggies inside though eh!
and mind them fingers :-D
@1Sdundon
Hi 1Sdundon :-)
glad to help it sounds like your floats might want adjusting I will pm you a vid of how I did mine.
@DAVIE1488
Cheers Dave :-)
Glad to help, Happy 4th "no hard feelings lol"
@pushur
lol dats funny pushur :-D
"Mmm! shut that door!" lol
I must start speaking proper England like we used to did at school!
:-) Hi Ray,
Terms from different areas are strange like when I first came across the term "Oil Bag" for oil tank! Where did that come from, and I had to look up what "Bondo" was, that's "Catty" over here"
I have also done a set of vids changing the fork oil seals on my T120 they are pretty similar to the T140.
@thirteendreams
No gold yet though!! :-D
or bronze so that's good
I'll watch this later. Us Yanks are busy blowing our hands off with fireworks this weekend in celebration of our divorce from the UK several years ago. (wink)
Ok i honestly thought you said "And maybe the Gay box"