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Post by twomotokiwis on Nov 22, 2023 14:18:41 GMT 10
Well, the story starts like normal, newbie curious Kiwi asking questions and reading stacks of info on this very forum and a wealth of information it is.
When we picked up our bike she rode like she had 4 PSI in the tyres and all the spokes were loose...so pretty evil and bordering unfun.
A level floor, accurate gauge established a 2 degree lean out and worse still 4 mm toe out at the front of the chair wheel, no wonder she handled like a supermarket trolley on drugs
We took her in to 1 mm lean out and eventually settled on 0.6 lean out, this still had me wondering as we spend a lot of time on gravel ....and Vic roads which have specifically designed cambers and humps and hollows to not suit Urals.
Roll on Omeo with an accidental meeting with haitch and an informative discussion and we decided to bring her in to near vertical, on doing this adjustment I discovered the top connection at the front to the frame was loose ....to the tune of 3 complete turns of the nut, yeap Yuri had stuck it in the hole and that was it, Andi can finish her off.
Post this adjustment our toe in had then gone minimally toe even.
The world is a workshop so a camp ground Burt Munro job was on the cards with straight edges and tape measure, now she is about 2-5 to 3-0 mm toes in and handling pretty good.
To that end, we are doing many back roads with unpredictable cambers etc so if someone does have the magical setting I would still be keen to listen.
The vid ...hopefully.
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Post by haitch on Nov 22, 2023 21:59:30 GMT 10
Mine is at .6 to .8 mm lean out, and around 6mm toe in. Mixed cambers still keep you on your toes in the dirty bits. To get it sussed. I would use variable tar seal (kiwi term) to tune toe in and lean out. Our dirty bits are too variable.
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Post by Uralee on Nov 23, 2023 14:01:14 GMT 10
You would think as admin I would be able to post correctly…..hmm, my reply yesterday has disappeared so here it is again..
2021 2wd. My specs with bike unloaded are: SC wheel verticle. 2.5mm toe-in measured at the treads of the SC wheel to the parallel of the rear wheel. 0.5 degrees lean out measured at the rear wheel.
This gives me very neutral handling solo and just “very slight” left bias loaded.
Including the front wheel in set-up measurements brings too many variables.
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Post by haitch on Nov 23, 2023 16:16:51 GMT 10
Ours is also very close to Lee's.
BTW.These numbers will change depending on load. EG with and without passenger and how the load is distributed across and fwd n aft. From memory, last we saw you were setting up fully loaded but no "Chinese accountant" it will change when you both climb aboard. Love the "Star Picket" straight edges. You taking them with you???🤣🤣.
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Post by twomotokiwis on Nov 24, 2023 13:40:21 GMT 10
Thanks for the replies lads, chewing some tar seal up today to Kurrambarra I noted the front tyre has quarter of a knobbly block more ride mark on the RHS.
Sunday evening we roll into East Melbourne to meet some mates and they have a house... hopefully with a flat garage floor...the world's a workshop 😁 so will do hopefully final adjustments.
Haitch, this one will involve Chiwi, me and fully loaded as that will be 99% of our riding, we have helpers who are keen to do measures so that works out well.
Unfortunately we had to leave the fencing standard being cos it would fit in the boot 😂.
One clarification please Lee, when you say SC wheel vertical, there isn't any adjustment for camber being preset on ours, is yours different?
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Post by Uralee on Nov 24, 2023 13:58:53 GMT 10
One clarification please Lee, when you say SC wheel vertical, there isn't any adjustment for camber being preset on ours, is yours different? Oh yes there is, but not much. Front and rear mounts both adjustable to level the SC frame which should then have the sc wheel vertical. Once you know the sc wheel is correct you can adjust lean out anywhere on any slope by measuring both with your phone and doing the sum.
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Post by twomotokiwis on Nov 24, 2023 15:15:48 GMT 10
One clarification please Lee, when you say SC wheel vertical, there isn't any adjustment for camber being preset on ours, is yours different? Oh yes there is, but not much. Front and rear mounts both adjustable to level the SC frame which should then have the sc wheel vertical. Once you know the sc wheel is correct you can adjust lean out anywhere on any slope by measuring both with your phone and doing the sum.
Ah ha, Ok, I looked at those and could not find a reference to them so I left them alone.
Newbie 101 then, our chair wheel does has a camber on it in to the chair at the top, can't measure it till the weekend tho, we are in Korumbarra Camp ground for the crappy weather and the bike has undercover parking and a camp kitchen with couches, flash as Michael Jackson we are.
So, if I can learn from your experience (haitch talked it up ) should we set the chair wheel camber vertical or should we set it to a pre determined good point of camber?
Attached is a coupla pics of our undergrowth.
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Post by Uralee on Nov 24, 2023 17:02:09 GMT 10
Visually looks like neg camber…..wheel leaning in towards chair. This will actually give better r/h cornering and help counteract the left pull of the chair but will make harder l/h turning while the wheel is on the ground……that is why I go neutral….vertical. Your front mount is lower than mine which is almost touching the fins on the barrel. Raising this and or both will reduce the neg camber on the sc wheel……It will also alter the toe-in and possibly the lean out. When setting up, it is often a kiwi chasing it’s tail until it finally has it. My order is: Frame adjustment to get sc wheel vertical and toe-in close. Lean out. Sc wheel check Toe-in again Lean out again
Adjusting toe-in or lean out almost always affects the other.
Oh, and do not eat the mushrooms at Korumburra under any circumstances….🤣
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Post by twomotokiwis on Nov 24, 2023 17:39:28 GMT 10
Oh, and do not eat the mushrooms at Korumburra under any circumstances….🤣
Awesome info thank you very much, even the sidecar stuff was useful
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Post by haitch on Nov 24, 2023 19:39:42 GMT 10
Thanks for the replies lads, chewing some tar seal up today to Kurrambarra I noted the front tyre has quarter of a knobbly block more ride mark on the RHS. Sunday evening we roll into East Melbourne to meet some mates and they have a house... hopefully with a flat garage floor...the world's a workshop 😁 so will do hopefully final adjustments. Haitch, this one will involve Chiwi, me and fully loaded as that will be 99% of our riding, we have helpers who are keen to do measures so that works out well. Unfortunately we had to leave the fencing standard being cos it would fit in the boot 😂. One clarification please Lee, when you say SC wheel vertical, there isn't any adjustment for camber being preset on ours, is yours different? Remember, Lee's measurements were UNLOADED. So, do you try for his loaded?? or unpack everything, stay off it and set from there. Then, load up gear and yourselves and test. Record you settings, so you can readjust. Before and after. Good luck and lets know how you go. BTW I am told no 2 Urals are built the same 🤣🤣🤣😇😇😇
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