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Author Topic: Wheel Base Advise  (Read 4502 times)
paulywombats
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« on: May 28, 2017, 10:39:50 AM »

Hello fellow Manksters

Well I'm at it again. Following on from A Deauville conversion, I am now on with a ST1100.

The bike is ex police, please don't hold it against the poor thing. Look at it more of a liberation from it's former life, a sort of good cop to bad.

Any road up, back to the reason for posting.

I have started the mock up, positioning axle on same wheel base as bike. This doesn't leave a lot of space to get propshaft in.

On the same wheel base it looks as though the prop will fall short of turning without catching on it's UJ.

Moving the axle back would cure this, as the angle will reduce.

Ideally I would like to keep same wheel base. Any thoughts would be very welcome.

Paul


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terry t
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« Reply #1 on: May 28, 2017, 12:16:52 PM »

Shorten the axle on one side.
Done this on my gl1000
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paulywombats
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« Reply #2 on: May 28, 2017, 05:42:19 PM »

Shortened the Deauvile, just looked better, however, saw a ST on ebay recently and diff was central.
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paulywombats
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« Reply #3 on: May 28, 2017, 06:04:21 PM »

Comparing trike pic to bike, it looks as though the wheel base has been lengthened.
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stumpy
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« Reply #4 on: June 15, 2017, 10:25:22 PM »

I kept wheel base same and diff centre on the ST I built it's still going well 30 degree ujs are the answer .... also final drive ratio of 2.82 / 1 as a bike so B stamp suited the build as I use same od wheels as bike
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paulywombats
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« Reply #5 on: June 16, 2017, 09:18:35 PM »

I see, did wonder about the UJ's
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merv
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« Reply #6 on: January 08, 2018, 09:14:55 AM »

I know this thread is a bit old now, but what did you do about the uj's ?
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paulywombats
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« Reply #7 on: January 08, 2018, 04:25:38 PM »

Hey Merv

I moved the axle back from the bikes original position and used the bikes UJ and the reliant UJ. ( I have kept the axle standard width )

I found that to keep the original wheelbase & axle width, I would have had to use different UJ's because of the angle.

Alternatively if you were to narrow the axle, you could maintain the original wheelbase. As there would be less of an angle between bike and axle.
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merv
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« Reply #8 on: January 08, 2018, 05:25:03 PM »

Two questions,

Question 1, is there different uj's that would fit the reliant prop and the bike drive shaft.
 
Question 2,how far back did you move the axle to the bikes original wheelbase.
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Why do every five minute job take all day, and
if it can go wrong it will go wrong
terry t
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« Reply #9 on: January 08, 2018, 05:46:21 PM »

Two questions,

Question 1, is there different uj's that would fit the reliant prop and the bike drive shaft.
 
Question 2,how far back did you move the axle to the bikes original wheelbase.

Merv answers

1 No you cant change the bikes ujs its all part of the shaft

2 your looking at moving it back about 3" to 4"

you will need to work out the difference by measuring to drive output shaft and centre of the bike. then you can work out the minimum length of the prop.
more figures for you mate Wink 
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merv
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« Reply #10 on: January 08, 2018, 08:07:56 PM »

Hi Terry
Could you do a drawing showing me what you mean, sometimes i take things in better when i can see it
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Why do every five minute job take all day, and
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terry t
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« Reply #11 on: January 08, 2018, 09:29:56 PM »

Hi Merv this is not to important but will give you an idea of how sharp an angle the prop will be. you don't want it to tight. on mine it 20" over all shaft length not including the uj on the engine
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