Lord Gruntfuttock Posted April 14, 2020 Author Share Posted April 14, 2020 Lockdown update. Wheeled this out of the shed of despair and found the rings and valve stem seal I'd bought to see if I could fix the plug oiling up issue... Exhaust valve cover was full of oil, interestingly... And all came apart ok, I'd used antisieze on the bits I had had off previously... No valve spring compressor, but my lockdown method worked beaut, clamped head to bench and levered valve down with open ended spanner, smaller spanner was just a spacer for leverage... Cleaned and lapped valves... And cleaned all bits in my 'new' parts cleaner, that I've had for months... And reassembled valves, new blue viton seal in the foreground... I did find an old seal but not sure where it came from, think it may have been wrongly installed on the intake...? 1 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 14, 2020 Author Share Posted April 14, 2020 Also found this, one broken compression ring... but bore looked good, and I had a set of standard rings so cleaned piston and installed them. Also masked cylinder and painted it after removing old gaskets... and gave it a quick hone before hone disintegrated... And cleaned 46 yr old gaskets off... And that's pretty much where things stopped as the gasket sets I had were for the wrong thing. Ordered another set which should be here in a couple of days (being essential) so did the only other thing I could do, added some stickers to the plastics... So shame I can't put it back together today, but made some good progress and hopeful it'll make a difference when all done... 9 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 20, 2020 Author Share Posted April 20, 2020 Gasket set arrived today, so cleaned things up and slid the barrel on. I had re-honed this yesterday with my bodged together hone (glued one stone back on)... Was bloody tricky getting the rings in but got there. Added rest of top end hardware ready for setting valve clearances, points, timing etc... But main thing is it's all buttoned up, hate leaving engines open. Would have made much more progress if also wasn't working from home... 4 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 22, 2020 Author Share Posted April 22, 2020 Made some progress yesterday. Fitted cam, valves etc, torqued things up and set plug gap, points gap, timing and valve clearances, and tried to start it. Had spark so thought it's be easy. Nope, kicked and kicked and kicked till I was a sweaty mess without even the slightest cough. Was wondering if timing was 180 degs out, then checked spark again and very weak, so had a think... That's right, these things need a good battery to start, checked and 4V. Doh... Chucked it on charge and decided to drain the old fuel for good measure, plus a new plug. Barried up another battery and was rewarded with a fat spark, so tried it out and she burst into life... Went for a quick hoon up the road but underestimated how useless the old 6v lamp is, especially when it's pointing at the sky. No moon out and no streetlights so was almost completely blind. Thought it best to park up for the night... Lunchtime today checked the battery, had risen to 6V but drained to 4v almost immediately so wired in the spare battery I had temporarily connected. Burst into life almost immediately so quickly threw the covers on and some extra fuel into her... And went for a much less scary hoon, seemed to go alright but was only round the block so no real test. Look forward to a better run when I can see how it goes over a distance. Looks good with the stickers though... Seems to have almost the same top speed in 3rd or 4th, not sure if gearing would fix that, didn't have gps running but seemed to be around 80kmh. Did a compression test when back and it's around the same as before I did rings, an acceptable 158'ish psi... So overall a win, lockdown plug chop here we come... 9 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 23, 2020 Author Share Posted April 23, 2020 Fitted my Ali rear light yesterday, so junk, but cost around $15 so hope it'll last for certification process... I used the original rear guard bracket to mount it on, but it is so cheap/flimsy (chromed plastic) that one of the screws vibrated out on my first test run, will look at mounting it better on rubber isolators so it stays put... And did some speed runs, 1st, 2nd, 3rd all good then when I knock her into top (at around 74kph) it either stays there or actually slows down, unless there is a kind tail wind or slight downhill. If I get a good bit of road it comes on song and actually winds out to 100kph... [proof] So looked at gearing options, standard is 15 front and 45 rear, and consensus is that's not bad for all round riding, apart from high speed runs, which it was never built for. If I change rear sprocket for more speed I already know it won't have the grunt to push it, and gearing it down so it pulls in 4th will make 1st gear redundant. Think i'll just leave it as Mr Honda intended. And it starts on choke easy but you have to flick choke off almost imediately, plug looked a good tan colour too, but have only been round the block so will check after a longer, hotter run. Looking ahead at cert process, need to sort brake lamp and indicators, but 90% there. Would love to get this legal, have started the process so be interesting to see how things go... 2 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 24, 2020 Author Share Posted April 24, 2020 New record today. 106 km/h. Too many people wombling about for proper speed run, but I'll take that... 4 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Lord Gruntfuttock Posted April 27, 2020 Author Popular Post Share Posted April 27, 2020 Yesterday I got the kids on it, eldest was rapt to ride a motorbike on her own (first time) although younger one was grumpy she was too small... Beauty was I could put it in low ratio and 2nd gear and they could chuff away reasonably safely (1st was too 'snatchy' on the throttle, couple of wheelies). Sadly though it stopped going after 30-odd minutes of backyard laps, low battery volts, oops... Tested it this morning after charging overnight, and getting over 7V when revving, but drops to 6V with the lights on, hopefully the low revs/lights on was what drained it. Time for another test run. Went with lights off and ran well, plug looked ok too, was a bit sooty after yesterday's low speed chuffing... And I seem to have built a Honda with british bike levels of oil retention. Hopefully just coming from clutch adjusting nut, might need a new o-ring... But 20-odd kms of good riding today (apart from a moment of panic when it started running rough miles from home, switching to reserve fixed that... And how's the serenity... 15 Quote Link to comment Share on other sites More sharing options...
Popular Post Lord Gruntfuttock Posted April 30, 2020 Author Popular Post Share Posted April 30, 2020 Milestone today. both my girls went solo. Pretty brave of the wee one, she can't hold it up as legs are too short... 17 Quote Link to comment Share on other sites More sharing options...
Raizer Posted April 30, 2020 Share Posted April 30, 2020 Awesome! Next lesson, clicking it down to first at full mang with the front brake hard on. 1 2 2 Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted April 30, 2020 Share Posted April 30, 2020 Awesome! Mate ya lived til you’ve binned a Honda ct/cub and winded yourself whilst trapped underneath 2 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted May 7, 2020 Author Share Posted May 7, 2020 Need a mirror so I can see if I'm being followed on my speed runs (paranoid about being oblivious to cop behind me while I've got my nose on the speedo and butt crack exposed attempting land-speed record) - so pulled one off the CB360 in the shed. Factory Honda item and free, but had a 10mm thread so bought a couple of adapters on trademe. Seller sent me the wrong ones though, and doesn't have any more, so looked at Barrying up an adapter, then realised there was heaps of meat on the mirror mount, so just drilled/tapped it out... And looks bloody good cleaned up and installed, considering it was a rusty old bit I was going to discard... Since I'm going to try to register this keeping things factory looking (apart from rorty exhaust ) can only help... 6 Quote Link to comment Share on other sites More sharing options...
peteretep Posted May 8, 2020 Share Posted May 8, 2020 On 30/04/2020 at 23:25, Dolan said: Awesome! Mate ya lived til you’ve binned a Honda ct/cub and winded yourself whilst trapped underneath Jeez I haven’t been winded in a long while, maybe I should get a ct 3 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted August 4, 2020 Share Posted August 4, 2020 Do you have a picture of where those bars attach at the bottom? On saturday I came I to possession of a ct90 K0. (Apparently they're rare/oldschool/desirable/I'm new to CTs so I dont know) but those bars arent there. 1 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted August 4, 2020 Author Share Posted August 4, 2020 The chrome bars around the engine, with the bash plate underneath? Think they attach underneath with the footpeg bolts. Will see if I can find a pic... Quote Link to comment Share on other sites More sharing options...
Chris.QCR Posted August 4, 2020 Share Posted August 4, 2020 You can check mine out @RUNAMUCK. Same setup pretty much and yeah the bash bar is between pegs and engine 1 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted August 4, 2020 Author Share Posted August 4, 2020 Yeah front two mounting holes of footpeg mounts go through rear two holes of bash plate... Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted August 4, 2020 Author Share Posted August 4, 2020 19 hours ago, RUNAMUCK said: Do you have a picture of where those bars attach at the bottom? On saturday I came I to possession of a ct90 K0. (Apparently they're rare/oldschool/desirable/I'm new to CTs so I dont know) but those bars arent there. pics of CT... Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted August 4, 2020 Share Posted August 4, 2020 2 hours ago, Lord Gruntfuttock said: pics of CT... 7 Quote Link to comment Share on other sites More sharing options...
Popular Post Lord Gruntfuttock Posted February 9, 2021 Author Popular Post Share Posted February 9, 2021 So still looking at getting the old 90 legal, not sure I actually need indicators given the year, but it has front ones fitted and a switch on the bars so thought I'd fit rears to avoid any arguments. There's some holes in the rear guard so I sketched up a cardboard template and pressed it in place to get locations... And cut a couple of plates out of scrap metal, stacked them to drill holes then bolted together to shape so they were the same... And I'd joined the Barrys poking around the recycling centre to find a bit of scrap tube to use as a stand-off. Found some machined plungers that I suspect were drawer soft closers or similar that were the perfect size when I pulled out the inners. Chucked them in the lathe to machine down the fat end though and tool just skipped across the surface, they were very hard metal, file wouldn't mark them at all. Looked into softening hardened steel and seems you just heat orange-red and cool very slowly, LPG bottle torch managed the first stage nicely... And I had the oven cranked as hot as possible, carried these inside, put them on a tray and turned oven off and let it cool over a few hours. Success, they machined nicely... One done, cut a small 12mm step to fit in the plates I'd drilled out to suit... I was going to weld them up, but have always liked brazing, and I had the torch out so silver soldered them together... And in place, wire just goes through to under the guard, there are captive nuts behind the 2 holes on the right so easy to install. Quite pleased with the shape, shame about the rust hole in front of it tho... (patina M8)... And how they'll look... I've painted them black after this trial fit, masking off the bit that goes inside the lamp as that is the earth contact. Pretty happy with how they came out, plus learned some metallurgy. Think I've got a 6V flasher unit somewhere, so will wire them up at some stage... 15 Quote Link to comment Share on other sites More sharing options...
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