i have an idea been collecting a few bits and pieces lately

Another one slips slowly across to the dark side. Good man!
We had a chat about rims etc before, Col. Would be interested to hear what you've done and where you got the bits etc,

Sean.

Jeez you had better add a stereo to the chair its got the slot for it all ready and waiting. Question would a k75 drum rear 18" suit the chair or jack it up too high????? or is the plan to go car tyres on the back as well?

The rim on my chair is an old 18" from a TX500 Yamaha. Made of steel....weighs approximately 3.4tonnes.

Col, that looks very much like a boat.I think I can remember that being on the bottom of Lake Canoblas.

saxon
not going to returning to

white bmw and sidecar, red cattledog this sitereally does attract like minded people
photo taken in 1993

k75cster
the bike has a stereo already this time i control the tunes
thinking of running car rims & tyres this time cheaper and last longer than sidecar tyres

stan
this boat was trawled up from the depths of lake macquarie on the central coast
undecided if going to use it i think style is too old for the enterprise have been experimenting with cardboard boxes

What you gonna do with the old ( dusting -like) boat?
I have found that using a car rim on the rear makes a huge difference to both the handling and also my bank balance. I just couldn't afford to buy a new rear tyre every 3,000km. That's all I was getting. The only gripe I have with it is that it is extremely difficult to get the thing on after removal for things like changing the final drive etc. Because the 4 mounting bolts are recessed into the car rim, there is not a lot of room and you have to use a " specially modified" 17mm ring spanner and can only do about a 1 inch increment each time.( Unless you want to remove the Zorst system every time) Because the rim fits flush onto the final drive and there are no locating dowels and there is also that spacer...it is bloody awkward to fit it without an offside. It has sometimes taken me hours!
I use a dab of grease to hold the spacer on, but it's still ridiculous.

Sean.

it was based on a dusting, a mate of mine built it in the late 80s i used for a while till i got my dusting
3000ks sounds about right that's why i am thinking car rims
father in law has returned from grey nomading we are working out whether to use djp chassis or manufacture one ourselves
if dont end up using it open to all ideas
i know you just had rear wheel off but if you remember next time if you could snap a pic or two of your spacer and a couple measurements i will give me an idea of what i have to make up to fit car rim i think it will have to made to suit whatever rim i decide to usebecause of offset
thinking of using a 15x 51/2 rim with tyre to match same rolling diameter of standard bike Tyre
180 or 190x 85

Sean Been looking at a few of the past threads and that rim on your bike is off a Mazda I think, late 60s

Col I dont think you would go anywhere close to getting a 180 tyre in there and have it within a bulls roar of centre.
What I would look at doing is get a 15" wheel about 5" wide then get an engineering shop to move the centre of the wheel so it is closer to the centre of the rim.
That way you wont have the big ofset and deep hole to put the bolts and it will be easier to get on and off.

A Mazda eh! In my mind I just thought 80's generic Jap rim.
Here is a photo of the adaptor I took the other day which gives you an idea of the offset. Excuse the dust as I had been riding on dirt roads.



The spacer is the stock rear wheel spacer. The tyre I am using is a 165. That's about as wide as you'd want, I think.
Sean.

thanks rick
i had sorter guessed that setting up the rear rim would be a head #$%&
there is a mob in south oz that makes wheels thinking i will ask them if they can do something for me with new rims possible might be able to get it drilled to suit final drive
might work out cheaper than enginerring shop
i thoght saxon was using 180
or 190 but i see he using 165

One wheel that may be worth looking at is some of the 318 BMW wheels. they have a very small dia bolt patern and may have enough to get it drilled with a smaller dia circle. Problem there is getting one narrow enough as they tend to be 6 and 7" rims but some of the late 70 and 80 may do it. I am thinking mags for weight.
One guy I know in Sydney uses the cragar wheels that they use for front runners on the funny cars.

I do know some guys with FJR 1300 Yamahas that run a 165 x 17 car tyre to get good miles when towing a trailer. You can get 17" rims on some K1200 with the same 4 stud as the K100 but they went to 5 stud with the K1300 and R1150 I think. you might get one that just bolts on.

i like the 318 idea
can you fit a car tyre to a bike rim are the bead profiles the same i was told they are different
what about the legal side

I'm using a 145 x 15 rear and I've just checked the receipt on which I had written the mileage when fitted; it's now done 13,200 miles and will probably go to at least 14.

15" rims seem to be the smallest that will clear the rear disc caliper. The K1200 17" rim will take a 165 car tyre but without a Paralever swing arm there isn't enough clearance without a spacer........and a spacer puts a greater load on the final drive bearings.

There are differences between bike and car rims.........15" bike rims are 2.86mm bigger in dia than car rims, but, in practice I know many sidecarists who mix tyres and rims without problems. If such things worry you, then stick to car rims and tyres or bike rims and tyres.

16" car and bike rims are within .25mm.

17" and 18" bike rims are 2.77mm smaller than the equivalent car rims.

Having the wheels in line is not particularly necessary on an outfit.

Good luck col, theres a lot to think about at this stage,

Cheers, Paul.

spent some of the day looking for rims
the wheel manufactures not interested
have one choice of tyre size 165 80 15
the local wrecker reckons he has a couple of 15x5.5 steel rims i think i will grab them and go from there to start with
it will end up being about 20mm smaller than standard bike rim and tyre
been playing with cardboard boxes should have model of body finished tomorrow

space saver rim the yellow ones are 15 x 5
found a shop in sydney area that can take the center out and replace it with a blank and drill any pattern i want just have to wait until the boss gets back from holidays end of the month
hopefully be able to bolt straight on no spacer needed or only a small one to center wheel
played with my cardboard boxes today came up with something i like

That's a good shape. What are you going to fabricate it out of?
Sean.

Thats a good shape? reminds me of something?

Still one of the better "bikie" movies made.
One thing that struck me, watching it recently....was how SMALL a Z900 is these days.
Back then they were huuuge.

still deciding between steel or fibreglass over thin ply

Col,
Check out the Ozzie K100 steel build underway on this page. Good shape for a K along the same lines as yours.
http://advrider.com/forums/showthread.php?t=294734&page=305
Cheers,

Its a nice shape and very good work but it would be very heavy. I would say around 300+lb as it sits and with lots more to go.
I would be inclined to use a technique that is used in building boats. You use thin strips of very thin ply and epoxy it together in a criss cross pattern.
Many a home built boat has sailed the world with that system, it is very strong.
One big advantage is that you build it a bit at a time you dont have one big fibreglassing effort.

Mine is merely made from sheets of Gal and riveted together.



It has the advantage of being quite light weight. You can carry it about by hand without any trouble. This lessens the strain on the bike and drive train which is something I am conscious of. Still...it all depends on what you are going to use the chair for...mine is just for luggage, the dog sometimes and to hold me up at traffic lights.



The "fuselage" is attached to the frame by 3 old Toyota engine mounts, which dampen some of the vibes and is also easy to remove. I sealed all the joints with silicon sealant and painted the inside with dampener from a rattle can. Put some old off cuts of carpet and glued them in...the windshield is made from 2.5mm plexiglass...the 5mm stuff just kept cracking at the drill holes.

I'm sure there are technically better ways of doing everything...but I'm no engineer and as said, its just to keep me riding long after I would have had to give up riding a large bike solo. As someone's avatar says...Blakey I think...in the end it's better to be riding anything than no bike at all...or words to that effect.

Yeah the first question is, what is it used for? The one in the link is very well made but from the looks it is from 1.2mm or 1.6mm steel to be able to get seam welds that good makes it heavy.

have to work for the next 5 days after that going to talk to a local bloke who bent the sheeting for my kart trailer and see what he says and make my decision after that i just cant weld thin stuff 1/2 inch plate 8mm rod no problems

Sean, that chair looks okay, I think its easier to replace damaged panels if they are rivetted rather than welded.

Hey you guys was that a pic from the film Stone from wayback havent seen that since God was a lad must try and find a copy rare in the UK.



BIG D

You been busy Col.. I to have been sneaking around in the shed with some Ideas.. I have borrowed subframe ideas from HERE his rig is very heavy though. He has pics of spacers and tyre and rims used. I like the idea, just needs to be lighter for me. I will start a thread on what i have been doing soon. I

Big D, I bought a copy of Stone from this guy awhile ago with no problems, but there are loads of people selling copies on fleabay.

http://www.ebay.com.au/itm/STONE-NEW-DVD-/130758487236?pt=LH_DefaultDomain_15&hash=item1e71d02cc4

It still stands up surprisingly well in many ways.
Cheers.Sean.

Hang on, hang on.....a chair may be a nice idea for some people...but now everyone is doing it....a virus maybe?

* Sound of evil laughter emanates from the top of the hill.

Good move Col, although I would prefer a K Bike trike in my old age (next month).
Has anyone seen this done?.

You're only a young fella RT I would like to be 60 again but would much prefer 40.

love the movie i can still remember the bikes going down the old tollway
the 25 year anniversary ride is still a blur got some photos somewhere
some bloke had a k100 trike for sale about a year ago i remember something about it on this forum
you can always get them training wheel thingys they sell, dont know their name but seem on web they are like outriggers
dont know how they corner but when you get them let us know rt

RT wrote:Good move Col, although I would prefer a K Bike trike in my old age (next month).
Has anyone seen this done?.

How about training wheels

Link won't post correctly so here is the long version

http://www.bikesales.com.au/private/details/bmw-r1200r-2008-11716344?__Dx=mode%20matchany&__D=trike&__sid=135B595FFAF1&__Ns=p_IsPoa_Int32|0||p_RankSort_Int32|1||p_HasPhotos_Int32|1||p_Make_String|0||p_Model_String|0||p_YearMade_Int32|1||p_PriceSort_Decimal|1||p_PhotoCount_Int32|1&__Qpb=1&__Nne=15&__Ntt=trike&__Ntx=mode%20matchallpartial&__Ntk=BikeAll&__N=1432%20604%201428%204294967253

ainsjac wrote:Hang on, hang on.....a chair may be a nice idea for some people...but now everyone is doing it....a virus maybe?

points at seanii and alby ....

he nearly got me committed also stan .....

but i relinquished and will just try to design some crash bars ...so i dont have that double flip and crack next time im buggered from a great days ride ... and arrive home ...all fumbly like !

poor poor gerty

hope to have her looking pretty before bingara

RT wrote:Good move Col, although I would prefer a K Bike trike in my old age (next month).
Has anyone seen this done?.

Two wheels in the wrong end.......................but a K.

http://www.grinnallcars.com/scorpion-III-sports-car.html

And about training wheels.............................

http://www.webroad.ch/monotracer/

One of those Grinalls had a triple expansion steam engine in it.

Buy a Car

It's possibly splitting hairs, but I don't like trikes. They no longer feel like a bike. With a chair you're still on a bike.
Sean

Ditto, Sean.

Trikes have much less carrying capacity than an outfit without the advantages of a solo.

But it takes all sorts.......

Paul.

Why not just bolt two Ks together......less engineering, still feels like a bike, has 4 wheels won't fall over and is not a car. I will have a look at it today.

omg ...a flat 8 2.0 litre

awesome !!

Well I am cheap and have a limited budget.
I just started to experiment with a wheelbarrow.
Yes I know, it will only be a summer chair, but I am a fan of open concept.

This is just a concept at this stage. We need to align the steering a little and have swivel joints instead of a pipe and wire. I believe this idea will take off.


This is the economy model, the poverty pack.....one wheel drive, less weight on the side bike. For US and Europe yuo don't have to have too much change, just swap fuel tank and seat.

A good idea Saxon.....problem they are not BMWs and not Ks.. I do like the safety gear, especially the leathers.

ainsjac

will the lights both front and rear be interchangable or will have to buy specific ones for each side

Well I never! now that is a great way of solving the heat in summer. Yep just ride the one that aint running. would be as simple as switching the cables over. who's a clever bikie then hmmmm

col wrote:

Let get serious....

Your design is a good start and I like it.

This reminds me the GEP sidecar that I own in 1977.
I can see that you shape the back of the chair to match the line of the rear mud guard of the K100, but the GEP had a nice trunk capacity for a small chair. The back was angled in the opposite way.
The angle of the front face may pose problems for somebody with big legs and feet. Reversing the angle of the front could create a nice foot rest for the passenger.
I think the front should be a little bit higher. (consider a passenger with size 10 or 11 feet).

TIP: take a picture of you sitting on a seat similar to the one you are planing to install, and draw the basic shape of the chair around your body. You want your passenger to be able to move its legs and feet. You cannot expect to have someone cramped in one position for hundreds of kilometers.
Something like this:



Here are pics of a GEP

Col, you would have to get a matching pair....2 RSs, etc. ,that way all is interchangeable. If they are RTs you need to have a wider gap between them...don't want to scratch the fairing when cornering. I can supply the pipe to go between them, the rest is up to you. Do you think we should patent the idea?