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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 14:26 - 14 Nov 2023 Post subject: |
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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Posted: 14:29 - 14 Nov 2023 Post subject: Re: Minsk 125. CCCP era 2-stroke commuter of the people. |
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Oh my..
..how fast does it go mister? ____________________ Now: A100, GT250A, XJ598, FZ750
Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600 |
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WD Forte |
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WD Forte World Chat Champion
Joined: 17 Jun 2010 Karma :
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Posted: 15:48 - 14 Nov 2023 Post subject: |
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Good luck with that
This guys done a few Minsk resto vids which may be of interest
https://www.youtube.com/watch?v=DCsjwj3x3NE
Edit:
I found it strangely satisfying to watch
but at around 20 mins I see he uses cement/oil on the piston to bed it in
Thats a new one for me!
At one point he appears to tap a new main bearing in by hitting
the inner race which is no no for me but hey, its his bike.
Using an old footpeg rubber as primary chain tensioner is interesting.
It looks nice and runs at the end, but without any paint or clearcoat it
will oxidise like buggery which would be a shame. ____________________ bikers smell of wee |
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 17:19 - 14 Nov 2023 Post subject: |
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 18:01 - 14 Nov 2023 Post subject: |
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It's a standard piston, group 2. I don't have a bore guage but as far as I can see, my bore is pretty tight. Maybe too tight if anything which may be why it nipped because group 2 is the larger end of standard.
I've ordered a standard piston and rings and I'll take it up to my local engineering guy to see if it needs a hone/bore running up it. Every chance it's not round anyway.
Got a set of clutch plates on the way from a Uk supplier. Aftermarket ones which I think have metal tangs. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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virus |
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virus World Chat Champion
Joined: 17 Aug 2006 Karma :
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Posted: 19:14 - 14 Nov 2023 Post subject: |
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ah I was wondering how long it would be before an eastern bloc smoker got to you again
Looks like a fun little project and a good few spares too?
Bet ya a pint you cant ride it to the dragon next feb ____________________ own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance. |
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stinkwheel |
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stinkwheel Bovine Proctologist
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 21:05 - 14 Nov 2023 Post subject: |
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Kickstart springs always get me confused.
https://lh3.googleusercontent.com/pw/ADCreHfOS4Oo7niC0dqMSEgtKZmzU7EW0F2f5eFoo77OJzDuq2PZv7mMTb2ubp9aGhBjT7lEmKI9ptfShEO1F7Lf0AcycukwotClV66Z87L6lq7a541g58mVpycrxI93Ne_fGpqLZnMLr2jtxC9Vic8F34Os=w1547-h870-s-no
https://lh3.googleusercontent.com/pw/ADCreHc2gY7mwLx98zLJk6N-RvjmQiSbiy-PXSoU8eS_48BZb0THKzh5n5wPotQNiW9SLZu1yBMlprWc3P6VYhKkibxbVC7AIjQxq6yrfxO7bzC5s1cLdXtYXerULabSyouW1KShljZiAoJ7lYDWFP7FDbmy=w1547-h870-s-no
Drive shaft oil seal retaining plate.
https://lh3.googleusercontent.com/pw/ADCreHenC8Vt6ShcLnlXBrjhYzUcVti2Mb7IzggAl5E1ONKfUxLZ5X4MIA6fi8Dchz0Bg5267M5mRHSMP0Z0afl3mjwnSV5xaS9GySdPLbhQnj2EEjmG-Ob7kkc5xlv2bzZQdNMuloXXvi3hcC6q5b-1SlX2=w1547-h870-s-no
With another knackered seal.
https://lh3.googleusercontent.com/pw/ADCreHd3BTNlPR3_-nEjQ9uCbb9GWjNbjm6-zd47FYPDkwq2KoB7W2WAbH0D8UzZzl0dEN7KLJlQ4RrXyZsMmAskymIOLSoF9U-oRELfjnjOcFEa8UGYu-5oIxlrfOGDOxhTJfdNlaH8QweA4IWnSLQe21ko=w1547-h870-s-no
And here's why. Also probably the reason for the bike being taken off the road. Someone's been over-tightening their chain. I bet that made a lovely noise.
https://lh3.googleusercontent.com/pw/ADCreHd4rhFYdzBBJGd8GiFRDoBn60oV6-x0vKq69YPiB_zY_FvHSs-h1sOY64hwq96QkDRxVr6kzI8w94W6UZHStfy29pcQquzkrbyjED1FfHVPCVVXAwc1lNyD1P70V9oKtsBLf7vsUzMSVTUvFsjwO3-k=w1547-h870-s-no
Remarkably, all but one of the cheese-head screws came loose. This one did not. Tried heat, penetrating oil, percussion and punching it round. No joy. I punched it so much, I landed upeffectively cold-chiselling most of the head off it so out with the drill.
https://lh3.googleusercontent.com/pw/ADCreHdUYuJgIGh0__M2vP2CW99k_2m-sxanaNJWtP5hE03FFoPkFFeKs7ZkvfTxH1-v2TmBWp_-Oi5ytozh-shI93On2D4fU_AM3VI9k98D7nYV8wKdAt3e3uKbJvboLFakBCqRgesAjDj0OVVhrQ4Tu30t=w489-h870-s-no
I'm going to replace these anyway. Not decided what head yet, several of them are in a recess so I can't use shouldered hex heads. Maybe even just better quality cheese heads.
https://lh3.googleusercontent.com/pw/ADCreHd6qZIfyk4lVd4jYrYxH_bxQ_g2nRKJIYsmH_700sKepUSGjElmciTcLjEq1RTFg0YNlFqiMEOPuDi4Ro3MT4pQD4E58xU77Vr4YXVZHuVN-4OKNZF-TYW_DMlRLDl8n7_Un1tEj06gQxYV9DtrgKnn=w1547-h870-s-no
Gearbox cover off.
https://lh3.googleusercontent.com/pw/ADCreHeCco5u6tvzPViXk50pn8KRtGCRKtVco0-d2ZYKoONl8isAzMbOfXX_v-5DbDO78lEUw8JxJ5wuZPA-Doj8K15OrpLQQndSKxCiEQaT_Gw5u-vxBS5MS70fqClG9WymCC4JMN8KpEm7C4qq1aQCH-cl=w1547-h870-s-no
Basic but way better engineered than the one in my enfield.
https://lh3.googleusercontent.com/pw/ADCreHe4LsH46kwVSpdtPP-jQU6e0AejygVSPN0RRKfUpsGN68IJAWfvdz5vMaeuZSeWcWcp7qLCS6osHo7P-RhmVz4Iw25Ao6XuG1vl4qfRJYWszD1nvz4r4DHwMuHuRROgk0Ajp5tQPS3eTbPc89_mmZqg=w1547-h870-s-no
https://lh3.googleusercontent.com/pw/ADCreHcOpPdDHbKDKfIx-UjTvz5ZfTjU-flzall05iJUMW82pkpogjKQhzg6yRropbuEfd_09EtBFG964ccgNmGF9P-nAZSBCwjC4wLYoWOHTc3almtjnN5WN4D1cAg0ZaGolb3AA2nAP7thrE4CRpphTKHL=w1547-h870-s-no
And that's a wrap for the day. I need a puller to split the motor so I'm going to pop into machine mart and see if one of their harmonic balancer pullers will bodge on. If it doesn't, I'll need to make a plate to bolt it to.
Plan for tomorrow is make up a list of bearings and seals, extract the bearings and take the crank to the engineers to see if it's worth splitting and swapping out the big end roller bearing. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 18:57 - 15 Nov 2023 Post subject: |
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Harmonic balancer puller duly bodged on. It took a hell of a lot of pressure to pull the two drive side bearings off the crank.
https://lh3.googleusercontent.com/pw/ADCreHeJC75nCLOFJOC6JFSfpXjJfFgNFHriR6zcjIMyk0HIV2Gsx2ItSNXuscQpwohgYR3voG3-HouOuTS00JQSWV2LRoO20pBgTZc9ZrtdpKmPWbf2xtGxcsaw-OK9XyY8UhCth53tQTHpRSk-I8Ne_MmO=w1547-h870-s-no
https://lh3.googleusercontent.com/pw/ADCreHeQt-Zu8ISfcA0QLFgrvuGVagIolEVx5-Fc3XUxjghXYXlUhRNQO-0iNit3aUwb3Ksf0fcMfiQW1weDVbHjah1NVwhpFmabEwEZ7ihvepdAxGum1br9bkym98_g8-feGrRq22H3vUBY3eM0TYnDIS2y=w1547-h870-s-no
Crank out.
https://lh3.googleusercontent.com/pw/ADCreHeTzMMCBfXC5vSDnuvYJwNRwdFon271fHOVMZT9PsfLAnbGOKM1aoBHgXfkZBsTdJvZittUZG-ghB5lPDcnYtx9gWuMXJhERs2e-gXYoW3fDmrzeozQHT9tuN0Pc1VJIplx3chcfYYWU1VjtAYaIf5z=w1547-h870-s-no
I took the crank down to my local engineering guy, he reckons it's probably just best to go with it because if I change the big end bearings for good quality ones, it might turn out the crankpin/big end doesn't fit properly. There's no play or signs of damage so we'll leave it as-is.
It also turns out I had several spare pistons in my boxes and an inordinate number of piston rings. Three brand new pistons, two of different grades of standard bore and one oversize.
https://lh3.googleusercontent.com/pw/ADCreHeG-P4ZH20FUkCBE-MQzjseco59P4oTk1eH3zTVOZMTgIHVhdScxzwf3jyuGQhxCNu5Htks1i3PS42VIoBpJQzUTTyfJESY6mnxYYwuNC7xBLv6cYl1o4S4zCuJlOIYCFARFIHl0kRhM_pGr8bO2j_6=w1547-h870-s-no
I was very suspicious about the damaged piston that was in it, the lack of corresponding cylinder damage suggested someone had slapped a damaged piston into a new barrel with new rings. My measurements with a vernier seemed to suggest it was actually a bit too tight which explains the smearing on the skirt. The bore gauge confirmed this. It also showed the cylinder was slightly oval and slightly tapered. One of the new pistons was 0.003" too big which is perfect, it's still within standard bore and leaves room to hone the cylinder paralell so I left that with him.
Dragged the garage oven out. This vastly increases the level of marital harmony. i got it free off a neighbour who was throwing it in a skip and I just plug it into the cooker socket in the kitchen. Ideal for bearing fitting/removal and curing paint.
https://lh3.googleusercontent.com/pw/ADCreHf2rdjoENim_qxTZ8CS3cilpArT4yh9zI_EmkPcbtYJFruNTDR2Gbm_ZF2Nu074npSGsO3ef8fzm4GpbVVP6WKN6ZnD95UHbjP4yqEQP2Mx3c234PIV9wPdjN_Dh2E4cpClIGT_D9ElgbWW5X6PCA43=w1547-h870-s-no
This made short work of extracting the bearings.
https://lh3.googleusercontent.com/pw/ADCreHcMb0Pa8e0MzKwVuycQ7muSkJ5wab5BwumEiaUR3cVcM3aFW71gEAkgl8h8z9nqqq9jR5exQP2tu2_eGxvEFOj13G1YFFUL-xMWnuZpeVsk-tiDQOR8JR3a0H80mzYXIe3O9Sz8aU_Qb0Srpp0on7ZH=w1547-h870-s-no
https://lh3.googleusercontent.com/pw/ADCreHfZBSKnTqab2atlcUtAx4ERkmj3bWoLwrK1ZyO-JEEisF8rRNXv-KM3aWS5jVvNKdPwYbe7gl4-89fWFKUnK4RnlKSTZM7bQiyKtVIHvc8AKHVTyScbxtUnIfPs_sS7GgVrYE_n3XTjQnoaj_jvXIjF=w1547-h870-s-no
https://lh3.googleusercontent.com/pw/ADCreHcd9MZHCEFqZ54gq4o71x7Bz3MsO2lQxkJSDq-zDDTaNLWwIhAvsWK28ax4LpC2mBJ6FcqRJMJYZtwrGfqJXo95tyc9LkiFyS_ipWRt5NY03NfONdkleqC9T96OpAvyP2YIKxN0VooY_RW5p3nAiMt0=w1547-h870-s-no
Now they've cooled down, I'll make a list of bearings, seals and fasteners to order.
Tomorrows job is to clean up the casings and get them ready for paint.
https://lh3.googleusercontent.com/pw/ADCreHeRFL5Bwpp9v3Wxc3lHnS9Y102baVkBX7keJiNy93pScvS09i74OUx7Zf5dpNhKK1E9UtLhuR0VeGRhtHnC3TaEVewQle4OlgAehp9NUU8gj4QKNrIUduBSI59YlAoO_NC8Fri3nTnoOSUDQ3OU-4Ci=w1547-h870-s-no ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Lone-Wolf |
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Lone-Wolf World Chat Champion
Joined: 13 Jul 2004 Karma :
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Posted: 19:13 - 15 Nov 2023 Post subject: |
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Wotcha.
Very, very similar to a Bantam engine . . . there again, considering the Bantam's history, it should be. ____________________ Cheers.
^..^
L.W. - www.moonshiners.org.uk |
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WD Forte |
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WD Forte World Chat Champion
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stinkwheel |
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stinkwheel Bovine Proctologist
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A100man |
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A100man World Chat Champion
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stinkwheel |
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stinkwheel Bovine Proctologist
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Posted: 14:44 - 16 Nov 2023 Post subject: |
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It's all going to slow down a bit now. Mainly because I'm back at work next week.
There are some tedious and manky jobs to do now before things can progress.
I've cleaned off all the engine casings with paraffin and hosed off the rough. They're now soaking in dishawasher tablets (If I had one, I'd run them through the dishawasher). Then they need a wash off in soapy water, rinsing, plusgas on the steel parts to stop it rusting.
Then there's the super boring bit of scraping off all the old gasket material and removing the paint.
The plan is to do it with aluminim simoniz engine paint on the casings and aluminium VHT on the barrel/head (garage oven for the win!). Not sure how best to go about painting the casings, there are a lot of fiddly bits to mask. I think bolting them all together than painting it as one unit is probably going to be the way, then I can run a scalpel down the joints while it's stilll soft, seperate the componant parts and bake them off seperately.
I also need to pull out the frame, swingarm, steering yoke and amy assorted bracketry and get them media blasted then blow over a coat of primer (or keep them inside somewhere until I have time to paint). I'm going to be faithful to the original which was all enamel and use tractol paint. I've used it before and it's very forgiving even with a old fashioned blow gun. I now have a HPLV gun so hopefully more of it will go onto the frame and less on everything else. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Rob Fzs |
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Rob Fzs World Chat Champion
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stinkwheel |
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stinkwheel Bovine Proctologist
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Posted: 18:33 - 16 Nov 2023 Post subject: |
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stinkwheel |
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stinkwheel Bovine Proctologist
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Easy-X |
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Easy-X Super Spammer
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Posted: 13:12 - 17 Nov 2023 Post subject: |
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With regards to footpegs, if you're aiming to do trials then something that "breaks well" when you end up at the bottom of a ditch ____________________ Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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stinkwheel |
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stinkwheel Bovine Proctologist
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Easy-X |
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Easy-X Super Spammer
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Posted: 17:59 - 20 Nov 2023 Post subject: |
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They look like bear traps compared to standard pegs ____________________ Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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Robby |
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Robby Dirty Old Man
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stinkwheel |
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stinkwheel Bovine Proctologist
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Posted: 21:22 - 20 Nov 2023 Post subject: |
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Robby wrote: | I recommend inspecting the frame between blasting and coating, if someone else is coating it. Any pinholes and thin areas will become very apparent. Seeing as you're getting stuff blasted, it would be silly to only sand the swingarm. |
The frame is very solid, just cosmetically poor, there's no flaky rust, only surface damage. One advantage of a poorly sealed, very rich running 2-stroke. The whole bike is covered in a film of partially burned/spilled 2-stroke oil, leaked out gear oil and cosmoline.
I'll be painting it myself in alkyd resin machine enamel. I've kind of gone off powder coating as a finish, If you need to do any repairs or modifications afterwards or if there's any damage, it's very tricky to repair/re-finish powder coating.
Although I suppose I really ought to just strip the swingarm and have it media blasted too. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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stinkwheel |
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stinkwheel Bovine Proctologist
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virus |
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virus World Chat Champion
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