got a bike that lists 30 weight engine oil, mid sixties four stroke twin, we've moved on since then, what alternatives should i look at to use?
got a bike that lists 30 weight engine oil, mid sixties four stroke twin, we've moved on since then, what alternatives should i look at to use?
I use EP 90 in the BMW's, but there are no bush's in them, you have to check the label GL4 and GL5 harms " yellow metals"
You may need to check that as its from memory.
DeMyer's Laws - an argument that consists primarily of rambling quotes isn't worth bothering with.
is it a combined unit, or stand alone gearbox. Wet or dry clutch?
Try some Castrol Classic XL30 or ST90 ( it's API GL-3)
EP90 is actually GL-4
A 50yr old long throw 4spd gearbox that's been running a heavier weight oil isn't got to like ATF....ATF is only equivalent to roughly 10w.
If it's been completely refurbished with new components & seals then yeah maybe, but it wasn't designed for it and 50yrs of wear & tear have got used to something with a bit of guts to it
I think I have a better idea on your age now. Oil & guts in the same context.
It's a cog box, not an internal combustion engine.
In the late '80's the Holden dealer parts manager phoned me to ask how I was fixing all the commodore 4 five speed gearboxes without fitting new synchros. The answer was, fill them with ATF.
1/ I didn't actually say to use ATF in the Vin box - just the clutch and primary of the Kawasaki if they were a separate compartment. BTW I suspect the kawa version of the BSA box has a few more rolling element bearings...
2/ SAE rating is irrelevant - EP90 ain't 90 weight. ATF is formulated for high temps and pressures.
3/ I've used atf in plenty of boxes since the 70's. It was the standard fix for slipping wet clutches in race 2 strokes and is still my first choice for a race post classic 2T engine.
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