Started my "KOLIBRI 125" RT

[mtntech]

Looks pretty good there Ralf, but I will say that the rod end (heim joint) at the outboard end of the upper control arm (where it attaches to the top of the spindle) shouldn't be there. Think about the forces exerted on it under heavy braking. They're not designed to handle the job you're asking it to do there.

[kolibri]

Thank you for your comment mtntech.

Bought this rod end by McGill motorsports UK . They offer this parts for motorsports and this rod end is strong for 41KN.

With a weight of 32 Kg at a front wheel and a total weight of 100kg at the moment I think it will be not a problem with braking.

I have 10 KW at the engine so it will go about 80 km/h. This is an other reason while I think it will work.

Got a lot of ideas from the plans of the sportcycle.

I will go go with this parts but thank you so much for your exception.

Ralf

[mtntech]

Ralf, I"m not sure if you understand what I'm getting at. Rod ends are meant to handle thrust loads, not so much radial loads. Their radial load limits are often 10% of their thrust ratings. When you brake in a vehicle the brakes will try and rotate the spindle (and a arms) in the same direction the wheel is rotating. The way your rod end is placed, all that stress will be borne on the threaded portion of the rod end. Make sense? Just trying to help.

[fredvv44]

Jun 14, 2012 15:33:34 GMT -5 mtntech said:

Ralf, I"m not sure if you understand what I'm getting at. Rod ends are meant to handle thrust loads, not so much radial loads. Their radial load limits are often 10% of their thrust ratings. When you brake in a vehicle the brakes will try and rotate the spindle (and a arms) in the same direction the wheel is rotating. The way your rod end is placed, all that stress will be borne on the threaded portion of the rod end. Make sense? Just trying to help.

i see your point but i'm not sure i agree. heim joints have been used all over the place for upper ball joints. just about every race car uses them. look at the Locost web forum. the more important issue would be the diameter of the threaded portion. 1/2" dia. may be on the small side. most guys use a 5/8" dia. for the upper arm on light cars.
Fred V

[mtntech]

I have seen more than my fair share of rod ends (1/2" and 5/8") fail when used this way. I know there are people that use them in place of ball joints. To each their own. I will stick with the proper part for the job.....a ball joint.

[kolibri]

Hello,

had time to lathe my bushings. And a Friend of mine welded them together.




After that I drilled the hole to the accurate diameter for the bearing.



Here is the result inclusiv the bearings and the inner bushing.



Mounting everything together and all things are working perfekt is

a great experience. From soft to hard I can choose my best

suspension adjustment.









Next week I will do the Frontsuspension.

Have to order another two shocks and in the meantime I will use the both of the rear.

Have a nice sunday.

Ralf

[kolibri]

Hello,

did the same with the frontsuspension and had my first roll out.









Working perfekt so happy. ;D ;D ;D ;D

Got the other shocks last week so it's a rolling chassis with

suspension.

Decided to make a new exhaust in stainless steel that will fit to the car because the original doesn't.

Old and new tubes.



All new parts I needed.



First steps.





Welded first step by step all small parts together.



And here is the final result.







I'm very happy with the result.

Next I will do the Steering wheel and the Chain and Sprocket

Stuff.

See you and thanks for whatching.

Ralf

[fredvv44]

Ralf, i was looking at your Comet reverse box and looked it up. i found this site that says it is rated for 16HP. it is used for go carts. will this work on your engine?
www.bmikarts.com/item/Comet-Forward--Reverse-Gearbox-800350-3191
Fred V

[mtntech]

The CBR 125 engine is rated at 13.5 HP.

[kolibri]

@ Fred

I hope that the reverse box will work, I will see by the first test drive.

@ mtmtech you are right the honda engine is about 10KW or 13,6 HP

So I hope it will work.

Thank you for your input.

Ralf

[mtntech]

I'm sure it will work. If it does fail eventually it's only $250 for a brand new one. Definitely an inexpensive price for reverse.

[kolibri]

Last pictures from the exhaust ready with the holder.







Next Update under new headline.

Ralf

[kolibri]

To make the drive train not to hard I decided to use rubber rings.

I made two plates one is connected with the wheel the other will carry the sprocket and between are the rubbers.










Ralf

[kolibri]

Had the problem that I have two gearboxes motorcycle and reverse box.

I wanted to do both operation with one shifter so I made it with two plates, a small and a big.

The small is for the motorcycle gearbox and the greater for the reverse gearbox.

The normal position is at the small plate , if I want to change the reverse box I have to pull the shifter ring and so it is possible to connect the pin to the bigger plate.

Hope that the pictures show you what I tried to describe.







There are different diameter axel and tubes, the small plate is connected to a 12mm axle the greater plate to 16mm tube.

On both , axel and tube I connected levers for the different gearboxes.



Here you see the linkage.







I am very happy with it because it works very well.

Next thing is the steering wheel.

Ralf

[fredvv44]

Aug 31, 2012 15:50:39 GMT -5 kolibri said:

To make the drive train not to hard I decided to use rubber rings.

I made two plates one is connected with the wheel the other will carry the sprocket and between are the rubbers.
Ralf

the MotoGuzzi uses 12 rubber bits, called Kush Drive. there is a lot of force against those rubbers.
Fred v

[kolibri]

@ triplethread:

I weighed it today , at the moment it is 160kg. 94 kg at the front and

66kg at the rear wheel.That means 58% at the front and 42% at

the rear. Not so bad. Hope to be ready by 210- 220kg so with driver

it is something about 300-310kg that is the same weight what

the original motorcycle honda cbr125 as the total weight has.


Because it is not so easy to get a reverse trike streetlegal I will do

the brakes and the rollbar with seat belt and than show it to the

German TÜV the first time.

Hope to be successfull and can weld the frame as it is.

Regards Ralf

[kolibri]

Sorry for the mistake the 300kg by the honda is included two person.
That is the total weight what I mean.

Ralf

[kolibri]

Sorry for the late update ,took 2 weeks of and was in the fantastic greece.

Before our vacation I decided to use the cap of the EV.



The frame doesn't fix because of my frontsuspension so I cut it of

and welded new tubes and plates on it.

Here it is original.



First try after cut it of.



Much more cutting was necessary and than I started with new tubes and plates.



Going to the final result.



And here it is mounted.





One of the easiest thing was to connect the steeringwheel to the
steeringrack.

The only thing I needed was a little peace of square tube 15x15mm.

I found this at Jochen's shop. The only thing to do was cutting and
mounting it to the u-joint because the new u-jouint has the same
15x15mm size.



A day before we left to greece I showed the KOLIBRI the first time the sun and tried to draw a disign.

Here some pics.













I think I better search for a good designer. Ha ha



Always the same after vacation: A lot of work to make money.

Hope to be able to work at the projekt the next day's.

Ralf

[kolibri]

Hello everybody,

here is a short update .

Had luck an Thomas made a rollbar for me: good work. It's made from one 90° and two 135° angel tubes.

It has the points where the seatbelt is mounted.





The next thing was the drive mechanism.

First a chain from the engine to the reversebox and than to the rear wheel.







Than I started to make all brake tubes.







After I finished I went to the german TÜV ( responsible to get the car street legal).

It was like christmas, eastern and birthday in one day.

I mean it was not the real acceptance of the car more an information but everything is good and I can weld all things as they are.

So I will go on with my work.

Wish you all a Happy New Year.

See you on proboards

Best greetings from Germany

Ralf

[mtntech]

Congrats on your initial TUV proceedings!