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Engine oil.
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Munchkin
Bedford
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May 12, 2020 - 7:48 am
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Banty has alot of black oil coming from her. No shes not leaking D1 just spits out from chain. She needs oil change.

straight answer do i need to clean do engine flush if so recommendations.

what is best oil for her. Thx

1951 D1 Bantam. 

2017 CMX 500

 

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cocorico
Central France
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May 12, 2020 - 9:51 am
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** Please log in to view **popcorn

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine now running.

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Blue Heeler
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May 12, 2020 - 10:09 am
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Hi Munchkin

2-stroke engines flush themselves with every cycle 🙂

...& the Rootes Commer engine I worked on, even used to decoke itself!

Assume you mean the gearbox oil. The oil therein will not be black, as it has no combustion process to turn it thus. It may be old & discoloured and contaminated with metal filings and clutch friction material.

The black oil you refer to is usually a leak from the gearbox output seal...or on the opposing side, some oil can seep past the   kickstart shaft and picks up a dirty grey colour from the steel kickstart shaft to alloy cover interaction. 

I use a cheap multigrade 20/50 in mine, as do several on here, but others like a straight 40 grade. Arguments on this abound. My clutch plates prefer the former. I change it every year, keep an  eye on the level and all is well.

Blue

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Munchkin
Bedford
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May 12, 2020 - 6:22 pm
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Thanks lads, il get some pictures upthe black oil and «censored» end up all over rear mudguard. 

1951 D1 Bantam. 

2017 CMX 500

 

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JustinW
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May 13, 2020 - 7:05 am
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Are you sure it's not just chain oil flicking off onto mudguard?

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Munchkin
Bedford
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May 16, 2020 - 11:57 am
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 Dunno will get pic chain is dirty

1951 D1 Bantam. 

2017 CMX 500

 

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Number6
Lincolnshire
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May 16, 2020 - 3:00 pm
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More info required – has this just started happening, or have you not used it for a while so not sure, or have you changed something so something is different ... (?)

Mike H --

Murphy's 4th law of motion states that any small object that is accidentally dropped will immediately hide itself under a larger object.

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