New arrival

One discovery I made on my new toy is the belt primary was running in oil that I've now drained out
Because the only history I have is the bike has stood for at least two years I don't know if it's migrated in there from the oil tank
Or it's been put there?
It appears to be 20/50
I'm wondering if the crankshaft oil seal has gone?
Anyone know if it's bad practice to run a primary belt in oil?
 
baz said:
One discovery I made on my new toy is the belt primary was running in oil that I've now drained out
Because the only history I have is the bike has stood for at least two years I don't know if it's migrated in there from the oil tank
Or it's been put there?
It appears to be 20/50
I'm wondering if the crankshaft oil seal has gone?
Anyone know if it's bad practice to run a primary belt in oil?
Click to expand...
Some timing belts are run in oil.

JFWIW
 
baz said:
One discovery I made on my new toy is the belt primary was running in oil that I've now drained out
Because the only history I have is the bike has stood for at least two years I don't know if it's migrated in there from the oil tank
Or it's been put there?
It appears to be 20/50
I'm wondering if the crankshaft oil seal has gone?
Anyone know if it's bad practice to run a primary belt in oil?
Click to expand...
Depends on the belt, if it’s a black rubber belt then it’s not compatible with oil. If it’s a white (ish) or red material (synchroflex) then its ok in oil.
 
Fast Eddie said:
Depends on the belt, if it’s a black rubber belt then it’s not compatible with oil. If it’s a white (ish) or red material (synchroflex) then its ok in oil.
Click to expand...
I'll have to pop the chaincase off and have a look
 
Today I made my version of a double ended caliper that'd fit through the spark plug and open out so I could measure my bore
It's not accurate by any means but it was close to 81 mm from what I could make out
So it's got to be a 920
 

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baz said:
Today I made my version of a double ended caliper that'd fit through the spark plug and open out so I could measure my bore
It's not accurate by any means but it was close to 81 mm from what I could make out
So it's got to be a 920
Click to expand...
Clever !
 
concours said:
81mm bore?!?!?!
Click to expand...
Yep or just under
The tool was to see if it was close to 77mm stock
Or whether it was closer to 81mm and actually was a 920 as claimed
So it's not for accurate measurements
Its just a guide
 
baz said:
Yep or just under
The tool was to see if it was close to 77mm stock
Or whether it was closer to 81mm and actually was a 920 as claimed
So it's not for accurate measurements
Its just a guide
Click to expand...
I completely understand.

A course measurement, either/or....



I was referring to the antique road show..... 😱
I'll get my coat🍻🤣
 

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