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History lesson needed...I have an engine #559240
08/20/14 11:33 pm
08/20/14 11:33 pm
Joined: Nov 2012
Posts: 271
Sacramento, CA
Denis J Offline OP

BritBike Forum member
Denis J  Offline OP

BritBike Forum member

Joined: Nov 2012
Posts: 271
Sacramento, CA
I got my newly acquired E3T engine today and am quite excited
I didn't realize it is an all alloy motor. (Currently painted black) We're all the 490cc engines alloy?

It is supposed to be 1949. Alloy pushrods are the only detail I read for 1949

Any info would be great. Thanks!



The formula for how many motorcycles to own is:
n+1=y
n = the number of motorcycles you currently own.

Motorcycle Mechanic at The Vintage Monkey in Sacramento, CA British and Old Motorcycle Specialists
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Re: History lesson needed...I have an engine [Re: Denis J] #559248
08/21/14 1:20 am
08/21/14 1:20 am
Joined: Aug 2001
Posts: 2,300
Oztralia
R
Rohan Online content
BritBike Forum member
Rohan  Online Content
BritBike Forum member
R

Joined: Aug 2001
Posts: 2,300
Oztralia
Originally Posted By: Denis J
I got my newly acquired E3T engine today and am quite excited
I didn't realize it is an all alloy motor. (Currently painted black)
Were all the 490cc engines alloy?

It is supposed to be 1949.


Does it have a year stamped on it ?
The engine number would say for sure what year it is,
E indicates a 1950 manufacture.
1949 ran from approx 18000 to 25000, 1950 to 33000 give or take a few hundred.
The 3T says is a rigid framed Trials Model.

The vast majority of 490cc engines in that era would have had an iron head on an iron cylinder, with steel pushrods. = HEAVY !!
All alloy engines were limited to the trials models - and may even have been optional.

That shape of crankcase only started for 1948, so it can't be any earlier than that, and alloy heads only started for the general run of bikes in I think 1955.
Road bikes (ohv) would never have had alloy cylinders, although the cammy models did in the 1950s.
It does make the engines slightly noisier.

Nice find.
Does it say Wellworthy on it anywhere. ?

Do you have a bike to put it in ?!

Re: History lesson needed...I have an engine [Re: Denis J] #559259
08/21/14 4:05 am
08/21/14 4:05 am
Joined: Nov 2012
Posts: 271
Sacramento, CA
Denis J Offline OP

BritBike Forum member
Denis J  Offline OP

BritBike Forum member

Joined: Nov 2012
Posts: 271
Sacramento, CA
It's very dirty, a trip to the parts washer is in order.
I have a featherbed frame I've been wanting to use for some time now. Might make a great bitsa bike. I see the 500T was a bit special to the trials group.

Thank you for the insight. I'm having a difficult time sorting through the information.


The formula for how many motorcycles to own is:
n+1=y
n = the number of motorcycles you currently own.

Motorcycle Mechanic at The Vintage Monkey in Sacramento, CA British and Old Motorcycle Specialists

Moderated by  Dave Comeau 


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