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 returning to bantam racing

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tonydavis

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Number of posts : 156
Age : 58
Localisation : london - ex East midlands
Registration date : 2006-12-01

PostSubject: Re: returning to bantam racing   Tue May 10, 2011 12:39 am

Dyslexia


"you are also right about dyslexic people being misunderstood, yet often having creative intelligence. It takes many forms, we are in good company, the late great John Britten for instance."

and myself Derek and if you would of answered my questioned about the Ducati you would of got the answer.


I won it in a legal case at work over Dyslexia
Very Happy
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Derek

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PostSubject: Re: returning to bantam racing   Tue May 10, 2011 7:38 am

Hi Tony

look really sorry I never new you had asked me to answer question on the ducati ?

sometimes its worth asking again as i do as the first answer especially if no answer means they did not get it.

ask me again?

kind regards Derek
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mjpowell

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PostSubject: Re: returning to bantam racing   Tue May 10, 2011 7:41 am

Derek I know you know I know.

So what you doing? fitting a 12t 14t or having one made 15,16? Why do you what to put
your clutch through it? Arn't you just deciding to ruin a different part of your bike? Anyway
you have loads of gears to ruin....
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tonydavis

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PostSubject: Re: returning to bantam racing   Tue May 10, 2011 8:15 am

bettsd wrote:
Hi Tony

look really sorry I never new you had asked me to answer question on the ducati ?

sometimes its worth asking again as i do as the first answer especially if no answer means they did not get it.

ask me again?

kind regards Derek

no need to apologise Derek, think it was something to do with having my priorities all wrong, so thought it would be of particular interest to you as I guess you didn't know I was also dyslexic (statemented 3 bloody times over) and only found out at 45 whilst teaching.

back on topic Surprised

Tony
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Derek

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PostSubject: Re: returning to bantam racing   Tue May 10, 2011 8:35 am

hi mike

also you seen the size of Go kart sprockets that do 15,000 rpm?

Kind regards
Derek


Last edited by bettsd on Tue Oct 18, 2011 1:28 pm; edited 1 time in total
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Derek

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PostSubject: Re: returning to bantam racing   Tue May 10, 2011 8:45 am

hi mike

i AGREE

Derek


Last edited by bettsd on Tue Oct 18, 2011 1:29 pm; edited 1 time in total
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mjpowell

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PostSubject: Re: returning to bantam racing   Wed May 11, 2011 4:33 am

Derek good look in your quest... will be interested if you get it to work...

My thoughts are on....
normal 17/38 primary:-
you cannot fit a bigger clutch because g/box speed is to high (will explode)
A torquey motor destroys chains and clutchs as it is (dogged plates and
shattered plates and spines on clutch centre).
A peaky high revving motor needs lots of clutch slip which saves the g/box
components but wears out plates nicely (but quickly). (N.B. my bikes)

With 12or14/38 primary :-
you will need a bigger clutch to cope with the torque(will it fit in the cover?
or even crankcase may need welding?) More load on g/box parts
(remember designed for 4! not 20bhp)

To many unknown's for me? But I wish your project well ....
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Derek

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PostSubject: Re: returning to bantam racing   Wed May 11, 2011 4:41 am

Mike i am genuinly interested in your comments on this, BUT I MAY WELL HAVE MY THINKING WRONG ON THIS.

thanks for the comments. kind regards Derek


Last edited by bettsd on Tue Nov 29, 2011 12:58 pm; edited 1 time in total
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Derek

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PostSubject: Re: returning to bantam racing   Wed May 11, 2011 5:53 am

HI MIKE on the point of clutch diameter not fitting the cases you see my clutch cover, your comments are very welcome. + or minus. !



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mjpowell

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PostSubject: Re: returning to bantam racing   Wed May 11, 2011 7:12 am

So is that a bigger than std diameter clutch in there?

Or normal diameter and lots of clutch plates? like 7? or extra long springs?

Lots of plates = lots of drag!

The clutch needs to be "light and airy" 4 plate, 6/7 springs lots of holes =

keep the revolving mass down.... and if it gets too hot do this....(see pic)



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Derek

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PostSubject: Re: returning to bantam racing   Wed May 11, 2011 10:41 am

Hi Mike

a very good post


kind regards Derek




Last edited by bettsd on Tue Oct 18, 2011 1:30 pm; edited 1 time in total
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mjpowell

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PostSubject: Re: returning to bantam racing   Thu May 12, 2011 9:02 am

Its only used on special occasions ..... as for the theory behind it we'll have to ask Ned!

He made it...

Wasn't fitted to 001 or 002 on purchase in 1984 but came with the spares and accessories....
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TERRY



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Age : 81
Localisation : CINDERFORD.FOREST OF DEAN
Registration date : 2007-05-25

PostSubject: Re: returning to bantam racing   Fri May 13, 2011 11:44 pm

Hi Mike !!!!!!!!!!!! "you missed the most important topic, what do you think could we go racing at the island, sure this could be arranged.
what do you and others think "

so the question is !!! " would you like to go and race at a circuit in the isle of Man " JURBY NOT SURE WHAT THE OTHER CIRCUIT IS CALLED ?

does anyone know the name of the club there, or who runs it that could point us in the right direction, thats if people would like to go and race there.?


just sitting here with DAD Showing him how to post Photo's and all.

regards - Derek.
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Ned

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PostSubject: Re: returning to bantam racing   Sat May 21, 2011 6:49 am

mjpowell wrote:
Its only used on special occasions ..... as for the theory behind it we'll have to ask Ned!

He made it...

No point asking me Mike, you know I'm full of bull s**t Laughing Laughing Laughing Laughing Laughing
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Derek

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PostSubject: Re: returning to bantam racing   Sun May 29, 2011 10:21 am

Hi I never seen this reply ned -

just spotted it I have been a little occupied, anyway hoping to have time for ed's bike over the bank holiday.

Ned - now always the sign greatness - "a sign of a real man" admitting your faults.



best regards Derek lol!
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Derek

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PostSubject: Cadwell engine seizures   Sun Jul 03, 2011 3:43 am

Blimy this bantam racing return is I feel very testing at the moment.!

regds Derek


Last edited by bettsd on Tue Oct 18, 2011 1:18 pm; edited 1 time in total
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Nick B

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PostSubject: Re: returning to bantam racing   Sun Jul 03, 2011 5:41 am

Evening Derek,
one thing to remember which springs to mind is the long slow down at cadwell,plus the slow run back to the paddock ,my opinion is this would then mask any true reading of the plug or piston colour perhaps thats one point to think about.
My dyno settings on more modern 2 storke motors would work as they did straight on the circuit apart from air pressure changes giving slight changes they worked spot on.
when i started bantam racing i was suffering seizures nearly every time out the motor was an old iron cylinder but my mixture settings and bore clearances were as of a modern motor.
This just did not work so i went for big piston clearance and what i would normally consider to be a rich mixture.
On your big end failure i feel this is an unrelated issue, maybe a coroded pin,rollers or eye or possibly mega over revving it was the only way i could destroy LC cranks at snetterton!
I am sure your sort it mate try not to over stretch things with the old motor i no we all want more power but i have gone for making my bike slightly slower in the hope of finishing more races and having fun out on the track rather than mending it in the paddock.
good luck with it and hopefully your get some more advice .

regards Nick
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john bass

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PostSubject: Big End failure...   Mon Jul 04, 2011 4:29 am

We suffered one Big End failure on Icarus-One. Derek Neil my engine man and race-monitor (he gave me advice about how NOT to fall off...!) concluded it was the phosphor bronze cage orbitting eccentrically at the higher speeds to cause lube starvation to the rollers...

The flat outer surface was scraping the mating surfaces dry -- DN reckoned...
He machined the phosphor bronze cage so that there were only two narrow "rails" on the outer edges and that big-end did five seasons after that.

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Edward Pickering

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PostSubject: Re: returning to bantam racing   Tue Jul 05, 2011 6:23 am

Hi Derek,

Is there any photos of the before and after rebuilds?




Regards


Eddie
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Derek

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PostSubject: Re: returning to bantam racing   Wed Jul 06, 2011 9:29 am

photos No time


best regards Derek



Last edited by bettsd on Tue Oct 18, 2011 1:18 pm; edited 1 time in total
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Edward Pickering

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PostSubject: Re: returning to bantam racing   Wed Jul 13, 2011 6:31 am

Hi Derek,


Hows progress going with things?


Regards



Eddie
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Derek

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PostSubject: Re: returning to bantam racing   Wed Jul 13, 2011 7:44 am

! just dont know how ever Micky Nash found the time to build all those bikes.

cheers Derek


Last edited by bettsd on Tue Oct 18, 2011 1:19 pm; edited 1 time in total
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Edward Pickering

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PostSubject: Re: returning to bantam racing   Wed Jul 13, 2011 7:48 am

Hi Derek,

Hope your dad is okay, pass on our best wishes. It must be something about the name Edward!


Regards



Eddie
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Derek

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PostSubject: Re: returning to bantam racing   Sun Jul 17, 2011 11:54 am

at last time to play -



regards Derek



Last edited by bettsd on Tue Oct 18, 2011 1:20 pm; edited 1 time in total
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john bass

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PostSubject: 2.54am -- dunn yew evver sleep, Derek?   Sun Jul 17, 2011 9:41 pm

Hi Derek!
What about sleep? -- posting at 2.54 a.m. ...!

All the best!

John.
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