is it correct that 350 can be bored to about 410cc
iif this is possible does anyone know what piston is
used
conversion of 350 to410
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carl spurr
- Posts: 6
- Joined: Sat Jan 01, 1983 12:00 am
- Location: NORTHAMPTONSHIRE UK
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Adrian Pancaldi
- Member
- Posts: 51
- Joined: Wed Jan 01, 1997 12:00 am
- Location: New South Wales AUSTRALIA
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conversion of 350 to410
Hi Carl,I'm not sure if you are a member,but if you are, refer back to the Technical Topics section of club journal "Jampot" for February 1999 for full details of this conversion.
As far as I can make out you need a 75mm piston,which could be utilised from an AJS 7R 1948-1955.The 7R is 74mm so you'd need one 40thou over.
By utilising a Sceptre piston you can get 400cc,however you need barrel and pushrod modifications.From what I read ,Andy from AB Engineering can give you the full run down on this conversion (01252615279).
Good Luck
and Regards,
Adrian
As far as I can make out you need a 75mm piston,which could be utilised from an AJS 7R 1948-1955.The 7R is 74mm so you'd need one 40thou over.
By utilising a Sceptre piston you can get 400cc,however you need barrel and pushrod modifications.From what I read ,Andy from AB Engineering can give you the full run down on this conversion (01252615279).
Good Luck
and Regards,
Adrian
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gacorner
- Member
- Posts: 5
- Joined: Mon Jan 01, 1990 12:00 am
- Location: EAST DUNBARTONSHIRE UK
conversion of 350 to410
You can use a Norton Model 50 piston. Standard this gives about 385cc but you can go out probably to +60 beyhond that. Gudgeon pin diameter and compression height are correct for post '48 long stroke.
Geo
Geo