Using the RD 80LC Barrell etc

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Using the RD 80LC Barrell etc

Post  Admin on Thu Feb 07, 2013 8:27 am

As Daz H mentioned it in another post what are the pros/cons etc of using the RD 80 LC barrell etc. In fact which parts would you need - new barrel, piston, cylinder head? How radical would the gearing have to be changed etc.

Any ideas would be appreciated. Very Happy
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Re: Using the RD 80LC Barrell etc

Post  daz.h on Thu Feb 07, 2013 3:58 pm

they were good for 80mph so thats a pro, yet very economical.
several firms also do conversion kits for these to around 110cc, the cylinder is quite small and compact.
i think they were a 42mm stroke, so using a vega crank would give extra cc's

cons fabrication would be required, welding etc
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Re: Using the RD 80LC Barrell etc

Post  itsjoeyfontane on Tue Mar 19, 2013 5:27 pm

...here's an idea i've had..? what about using the rd reed valve piston in a casa alloy barrell ? I think its the same bore ..? can't remember or spell dimensions..lol... and adding a reed valve...

not had time to follow this idea up...the skirt length and hole size in piston may be an issue...? Shocked
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RD 80

Post  Admin on Wed Mar 20, 2013 10:19 am

Good thinking Joey - I live near to the tuner Harry Barlow (of Pro Porting fame) he's a Yamaha as well as Lambretta tuner so I'm going to quiz him on this one
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Re: Using the RD 80LC Barrell etc

Post  daz.h on Mon Mar 25, 2013 1:50 am

let us know how you get on.
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Re: Using the RD 80LC Barrell etc

Post  itsjoeyfontane on Fri Apr 12, 2013 2:11 pm

..any progress here..?
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RD Barrell

Post  Admin on Thu Apr 18, 2013 5:10 am

Trying to pin Harry Barlow down is harder than trying to pin me down sometimes Very Happy So far no joy Very Happy
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Re: Using the RD 80LC Barrell etc

Post  itsjoeyfontane on Thu Apr 18, 2013 7:34 am

..just need to find out the depth of the skirt from the pin centre and how much skirt from the windows to the base as I have a feeling it might have to cut to fit...?
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Re: Using the RD 80LC Barrell etc

Post  itsjoeyfontane on Wed Apr 24, 2013 10:14 am

... does anyone know what the clearance gap measures between the piston skirt and the crank webs at bdc...from my guesstimates the rd piston looks good -4mm off skirt.. Leaves about 4mm from skirt bottom to port window hole.....? study
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