Author Topic: Baffled, confused and covered in oil!!!!!!  (Read 4540 times)

Online edboy

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Re: Baffled, confused and covered in oil!!!!!!
« Reply #90 on: 11.12. 2020 23:18 »
the more i consider a 20mm deep threaded insert to house the anti syphon ball the more i like the idea. removable to clean and check seating  surface and could even dowel into the pump body. a brass insert would be easy to make. one side of the bsa lubrication shortcomings taken care off.

Offline muskrat

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Re: Baffled, confused and covered in oil!!!!!!
« Reply #91 on: 13.12. 2020 19:57 »
G'day Steve.
About a cup (250ml) or less should remain (after 15 minutes of drain down).

G'day Edboy.
Easier to do the A50/65 modification.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online edboy

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Re: Baffled, confused and covered in oil!!!!!!
« Reply #92 on: 13.12. 2020 22:56 »
hello muskrat,
i m not convinced with the a65 conversion. is the oil way oversize to the steel ball and oil flow is around the ball bearing. also is the spring able to move around side to side ?

Online RDfella

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Re: Baffled, confused and covered in oil!!!!!!
« Reply #93 on: 14.12. 2020 12:20 »
When I converted mine to the A65 type system I made the rear plug with a small dimple to locate the spring centrally in the hole (1/4 spring in 5/16 hole) as I didn't want it lying on the bottom. I found the conversion made no difference and it still wet sumped until I fitted a valve in the oil line. I believe the A10 and A65 springs are different, but some suppliers provide the same spring for both. Maybe the stronger spring is needed, but mine's cured with the valve now.
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

Offline chaterlea25

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Re: Baffled, confused and covered in oil!!!!!!
« Reply #94 on: 14.12. 2020 13:18 »
Hi All,
Edboy, Yes and yes to your questions,
I recently posted further information on the conversion when I was modifying a bush equipped engine.
RD,
The conversion will work 100% only if the oil pump does not leak. Almost all original pumps leak along the drive spindles and between the joints on the body. The bodies can also be porus and leak through the mazac
The new pumps have a seal on the drive spindle which helps considerably..

John
1961 Super Rocket
1963 RGS (ongoing)

Online edboy

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Re: Baffled, confused and covered in oil!!!!!!
« Reply #95 on: 14.12. 2020 17:15 »
great info john. i m off to the shed. there must be a spare pump somewhere.

Offline stev60

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Re: Baffled, confused and covered in oil!!!!!!
« Reply #96 on: 19.12. 2020 23:03 »
Thanks Musky thats about the amount I have after drain down, a bit less.