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waxmonkey |
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waxmonkey L Plate Warrior
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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WD Forte |
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WD Forte World Chat Champion
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waxmonkey |
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waxmonkey L Plate Warrior
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Easy-X |
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Easy-X Super Spammer
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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WD Forte |
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WD Forte World Chat Champion
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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WD Forte |
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WD Forte World Chat Champion
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waxmonkey |
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waxmonkey L Plate Warrior
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 20:20 - 14 Mar 2023 Post subject: |
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GZ125 has a wire wheel yes? Might be easier to just lace a new rim onto it?
If you have a lathe and enough machining knowledge to use one, you could fit pretty much whatever wheel you want as long as it fits between the forks and has a single disc. Couple of new spacers and perhaps a spacer plate to move the calliper if it doesn't align with the disc properly.
DR350 wheel might be worth a look, but any 21" wheels will probably have an alloy rim.
You do know if you modify the frame you'll need to re-register the bike as a radically altered vehicle and have it put through an MSVA test and register it on a Q-plate.
If it has a modificed frame, it's radically altered. If it has the original, unaltered frame it must have at least two of the following:
Forks
Wheels
Engine or gearbox ____________________ “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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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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waxmonkey |
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waxmonkey L Plate Warrior
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Easy-X |
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Easy-X Super Spammer
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P. |
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P. Red Rocket
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Robby |
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Robby Dirty Old Man
Joined: 16 May 2002 Karma :
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Posted: 11:33 - 15 Mar 2023 Post subject: |
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Further to that, getting a new rim and spokes and re-lacing the hub you have is a fairly obvious answer, it's what people have been doing with specials for decades.
If you didn't know about that, the chances are that you don't know what you're doing with a swingarm extension and monoshock conversion.
The monoshock conversion has the potential to be most dangerous in the most extreme situations. You're taking a load that was engineered to be spread across two shocks, a bit further down the swingarm. You're doubling that load by putting it into one shock, then increasing the leverage by extending the arm. You're pointing the top of that shock at the base of your spin, and hoping the top mount doesn't let go under maximum strain - which is generally hitting a bump, at speed, under load. Like what you're doing coming out of a corner.
Cocking around with suspension like this is proper engineering, where you really need to do some maths to know if it is safe. Lacing up a wheel is just home workshop spannering.
That's why everyone is laying in. That and you sound like warped, our own resident engineer fantasist from a few years back. Prove us wrong and people will ease up. |
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Ste |
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Ste Not Work Safe
Joined: 01 Sep 2002 Karma :
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Posted: 11:38 - 15 Mar 2023 Post subject: |
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Please post photos of the swingarm and suspension.
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 13:09 - 15 Mar 2023 Post subject: |
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Robby wrote: | Further to that, getting a new rim and spokes and re-lacing the hub you have is a fairly obvious answer, it's what people have been doing with specials for decades.
If you didn't know about that, the chances are that you don't know what you're doing with a swingarm extension and monoshock conversion.
The monoshock conversion has the potential to be most dangerous in the most extreme situations. You're taking a load that was engineered to be spread across two shocks, a bit further down the swingarm. You're doubling that load by putting it into one shock, then increasing the leverage by extending the arm. You're pointing the top of that shock at the base of your spin, and hoping the top mount doesn't let go under maximum strain - which is generally hitting a bump, at speed, under load. Like what you're doing coming out of a corner.
Cocking around with suspension like this is proper engineering, where you really need to do some maths to know if it is safe. Lacing up a wheel is just home workshop spannering.
That's why everyone is laying in. That and you sound like warped, our own resident engineer fantasist from a few years back. Prove us wrong and people will ease up. |
As above, your frame doesn't have any centre-bracing to take the load of the monoshock and linkage so you'll have to fabricate that. Looking at a GZ125 frame, you're looking at practically building an entire new frame from the engine back. Which then triggers an MSVA test and Q-plate.
I'd go so far as to say you couldn't have picked a less suitable frame for a monoshock conversion. ____________________ “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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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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Posted: 13:35 - 15 Mar 2023 Post subject: |
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ooh - does look a bit flimsy doesn't it. Looks like the seat could be structural.. show us wat you've done so far..
..dare you!
As for the front wheel swap - other than the new rim idea usually folk go for a complete front end swap (yokes/forks etc..) which often means a stem swap from the old set-up. In either case you then have t consider new brake cables or hoses and whether the speedo drive still work etc.. ____________________ Now: A100, GT250A, XJ598, FZ750
Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600 |
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Easy-X |
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Easy-X Super Spammer
Joined: 08 Mar 2019 Karma :
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Posted: 14:16 - 15 Mar 2023 Post subject: |
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Just for fun, my favourite Indian bodgers making a bike from scratch:
https://youtu.be/T9Uwl-EItvU ____________________ Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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Posted: 16:02 - 15 Mar 2023 Post subject: |
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Wow, I bet thats not the first one he's made. Makes it look easy but his skills are impressive.
My one concern - the gauge of steel used on those shock mounts ____________________ Now: A100, GT250A, XJ598, FZ750
Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600 |
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Easy-X |
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Easy-X Super Spammer
Joined: 08 Mar 2019 Karma :
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Posted: 19:38 - 15 Mar 2023 Post subject: |
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Box section and done by eye... old skool At least with the dirt bike they'll probably be doing slow speeds when it does the insto-collapso. ____________________ Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Old Thread Alert!
The last post was made 1 year, 42 days ago. Instead of replying here, would creating a new thread be more useful? |
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