!965 moulton speedsix

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lotus 30
Posts: 47
Joined: 13 Mar 2017, 4:26pm

Re: !965 moulton speedsix

Postby lotus 30 » 23 Oct 2018, 10:05pm

just paint the rear rack and its finished it rode well andy

garygkn
Posts: 1425
Joined: 16 Aug 2008, 8:59pm

Re: !965 moulton speedsix

Postby garygkn » 23 Oct 2018, 10:13pm

That's nice.
Not too much work and you have a real classic. How do you find the derailleur when changing gears?

I'm a trendy consumer. Just look at my Moto G (4) using hovercraft full of eels.

lotus 30
Posts: 47
Joined: 13 Mar 2017, 4:26pm

Re: !965 moulton speedsix

Postby lotus 30 » 24 Oct 2018, 11:05am

When i put the bike together on the stand. I tested it everything was back together exactly as it was, The chain immediately jumped of the front chain ring. so i got it in top checked the angle of attack on the chain ring. then dropped it into sixth. The angle changed dramatically in top not to bad in sixth. I remedied it by moving the wheel on the axle over to the right. actually i just moved one lock nut from side to side. That fixed it no problem on all six gears, On the test ride absolutely no problems at all. In fact it was a delight i got into it really quickly after my carbon bikes have index. The gear change lever is ideally placed better than my other classic bikes on the down tube. andy

Brucey
Posts: 42931
Joined: 4 Jan 2012, 6:25pm

Re: !965 moulton speedsix

Postby Brucey » 24 Oct 2018, 11:48am

what sprocket sizes have you got on your freewheel?

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

lotus 30
Posts: 47
Joined: 13 Mar 2017, 4:26pm

Re: !965 moulton speedsix

Postby lotus 30 » 24 Oct 2018, 12:47pm

Brucey

Rear block 11-13-14-16-18-21-----60 on the TA chainwheel

Brucey
Posts: 42931
Joined: 4 Jan 2012, 6:25pm

Re: !965 moulton speedsix

Postby Brucey » 24 Oct 2018, 1:39pm

lotus 30 wrote:Brucey

Rear block 11-13-14-16-18-21-----60 on the TA chainwheel


gear ratios are thus

http://ritzelrechner.de/?GR=DERS&KB=60&RZ=11,14,13,16,18,21&UF=1320&TF=90&SL=2.6&UN=KMH&DV=gearInches

47.3, 55.1, 62.0, 70.9, 76.3, 90.2"

-which is quite a lot different to those reported in the CW test. I wonder if they had different ratios to you?

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

User avatar
Chris Jeggo
Posts: 203
Joined: 3 Jul 2010, 9:44am
Location: Woking

Re: !965 moulton speedsix

Postby Chris Jeggo » 24 Oct 2018, 6:45pm

Brucey wrote:
lotus 30 wrote:Brucey

Rear block 11-13-14-16-18-21-----60 on the TA chainwheel


gear ratios are thus

http://ritzelrechner.de/?GR=DERS&KB=60&RZ=11,14,13,16,18,21&UF=1320&TF=90&SL=2.6&UN=KMH&DV=gearInches

47.3, 55.1, 62.0, 70.9, 76.3, 90.2"

-which is quite a lot different to those reported in the CW test. I wonder if they had different ratios to you?

cheers

The gear ratios in the CW article do not make sense - see my post above. I assumed a diameter of 17"; your circumference of 1320mm is 16.54" diameter - is that from a roll-out measurement?

lotus 30
Posts: 47
Joined: 13 Mar 2017, 4:26pm

Re: !965 moulton speedsix

Postby lotus 30 » 24 Oct 2018, 7:56pm

Yes 17" wheels i shall ask on the Moulton face book page for other speedsix owners to check there blocks. my bike is actually a 66 late one i checked with the club registry and the frame number slots in as a 1966 not 1965 as it was advertised as. The bike came with this aluminium rear rack apparently not to many have survived so i set about repairing it today. I shall fit a steel one for general use, and fit the aluminium one when the opportunity arrises.
IMG_2943.JPG
IMG_2951.JPG

lotus 30
Posts: 47
Joined: 13 Mar 2017, 4:26pm

Re: !965 moulton speedsix

Postby lotus 30 » 24 Oct 2018, 8:26pm

Brucey wrote:
lotus 30 wrote:Brucey

Rear block 11-13-14-16-18-21-----60 on the TA chainwheel


gear ratios are thus

http://ritzelrechner.de/?GR=DERS&KB=60&RZ=11,14,13,16,18,21&UF=1320&TF=90&SL=2.6&UN=KMH&DV=gearInches

47.3, 55.1, 62.0, 70.9, 76.3, 90.2"

-which is quite a lot different to those reported in the CW test. I wonder if they had different ratios to you?

cheers
Tony Hadland's book quotes 48.5-----56.6----63.7-----72.8-----78.4------92.7 interestingly

garygkn
Posts: 1425
Joined: 16 Aug 2008, 8:59pm

Re: !965 moulton speedsix

Postby garygkn » 24 Oct 2018, 9:03pm

That's a nice rack. I've not seen one like this before now.

I'm a trendy consumer. Just look at my Moto G (4) using hovercraft full of eels.

lotus 30
Posts: 47
Joined: 13 Mar 2017, 4:26pm

Re: !965 moulton speedsix

Postby lotus 30 » 24 Oct 2018, 9:09pm

garygkn wrote:That's a nice rack. I've not seen one like this before now.

I'm a trendy consumer. Just look at my Moto G (4) using hovercraft full of eels.
Yep pretty cool worth saving i thought then found out how so few have survived they weren't made at the BoA works but at a local engineering works apparently. Pleased with my repair work today i have not gas welded aluminium for a few years.

Brucey
Posts: 42931
Joined: 4 Jan 2012, 6:25pm

Re: !965 moulton speedsix

Postby Brucey » 24 Oct 2018, 10:46pm

Chris Jeggo wrote: The gear ratios in the CW article do not make sense - see my post above. I assumed a diameter of 17"; your circumference of 1320mm is 16.54" diameter - is that from a roll-out measurement?


that was just a hangover from my previous effort. Hadland's number seem more accurate.

lotus 30 wrote:Tony Hadland's book quotes 48.5-----56.6----63.7-----72.8-----78.4------92.7 interestingly


closely corresponding with these
http://ritzelrechner.de/?GR=DERS&KB=60&RZ=11,14,13,16,18,21&UF=1356&TF=90&SL=2.6&UN=KMH&DV=gearInches

if a 17" wheel diameter is used. Actual tyre rolling diameter may vary a bit but (for 32-369 tyre) 369 + 32 +32 = 433 which is very close indeed to 17"

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

lotus 30
Posts: 47
Joined: 13 Mar 2017, 4:26pm

Re: !965 moulton speedsix

Postby lotus 30 » 27 Oct 2018, 1:36pm

I have since found out this bike is a 1966 just got a feature or two that changed.
Finished the aluminium rear rack made the extension tube repaired the original end and welded in the extension. made a finishing clamp. And made the clip and support bars its taken a couple of days but i am happy with the result.
IMG_2952.JPG
Last edited by lotus 30 on 27 Oct 2018, 4:47pm, edited 1 time in total.

garygkn
Posts: 1425
Joined: 16 Aug 2008, 8:59pm

Re: !965 moulton speedsix

Postby garygkn » 27 Oct 2018, 2:27pm

It looks very good with that rack. I like it without paint.

I'm a trendy consumer. Just look at my Moto G (4) using hovercraft full of eels.