Conrod oil holes

my understanding of the oil hole is to squirt the piston and not the bore with oil to cool it. baz

The early 650 and 750 motors had conrods with no bleed holes. Later at engine 116372,6 start oil pump drives andstrengthened rodswith oiling holesarrivedto provided more lubrication to the pistons. Over-oiling then became a problem which was dealt with by the fitting of specialTwinflexpiston rings.

I ran a 1962 650 and a 1964 Atlas for many years with no engine problems turning up. Theyboth had the early conrods and 3 start oil pumps. I would suggest that how the bike is ridden and the choice of engine oil can make a huge difference to reliability.

Hi all

I personally would assemble the conn-rods as per the Norton commando workshop manual,,ie hole in shell lined up with drilling in conn-rod

I can only see benefits to the life of your engine, Oil being thrown about twice every revolution can only aid the mist (or is that mystery) to the lubrication of the mains/cam bearings and cylinder bores etc,also twice per rev fresher cooler oil replaces the oil spent when the holes line-up, so you get the best of both worlds oil pressure and oil flow. win win as I see it

steve

I have always fitted the blank shell over the hole. I like to keep the oil in the shells, it works it's way out up the side of the rods anyway and up the bores etc. Good idea but unnesasary.

Tony

I have always fitted the blank shell over the hole. I like to keep the oil in the shells, it works it's way out up the side of the rods anyway and up the bores etc. Good idea but unnesasary.

Tony

Hello me thinks this too I just got a nice set of 1.75 shells from the NOC spare store and low and beholed there the original Vanervell Shells at a very good price too well done Mr spares man you see you can get a good deal with your Club spares, your should all give them a try, you cannoy beat orignal old stock in purfect order, , yours Anna J