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by robert.clark
Mon Aug 17, 2020 11:11 am
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

Re: VG big end and flywheel assembly

Attached pics of the flywheel numbers which are far from clear. Educated guesses of what else it could be? VG5.jpg VG6.jpg VG7.jpg Also close ups of the bearing pins and their engagement in the flywheels which are between 4 / 5 mm 3/16 inch. VG8.jpg VG9.jpg Couple of pointers here. I have the 1 15/1...
by robert.clark
Sun Aug 16, 2020 10:05 pm
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

Re: VG big end and flywheel assembly

Paul, Will post photos of both wheel designations in the morning.
by robert.clark
Sun Aug 16, 2020 9:24 pm
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

Re: VG big end and flywheel assembly

John, they are steel not cast iron as confirmed when the O/ diameters were skimmed. Secondly their designation A7 / 343S will suggest the period 1933 / 1935 a period of supply of steel flywheels. That,s why I mentioned the relaxation of the taper fit. Sounds like youve done these before - what clear...
by robert.clark
Sun Aug 16, 2020 7:34 pm
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

Re: VG big end and flywheel assembly

Hi Simon - thanks for your response Qest 1) By 'outer cage' are you referring to the bearing outer race ? Answer Yes correct 2) Is it a parallel fit crankpin or a taper fit crankpin? Answer Its a taper fit crankpin. I measure its a half thou taper of its length. 0.9375 / 0.938 both sides. 3) Are you...
by robert.clark
Sun Aug 16, 2020 5:11 pm
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

Re: VG big end and flywheel assembly

Should have mentioned that in the description. New drilling on the 3/4 inch taper
VG4.jpg
by robert.clark
Sun Aug 16, 2020 4:48 pm
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

Re: VG big end and flywheel assembly

Hi Adrie, Yes it does - not overlooked - already drilled the new oil hole everything aligns. Well spotted your obviously on the case.
by robert.clark
Sun Aug 16, 2020 1:47 pm
Forum: Four stroke
Topic: Iron VH Pushrods
Replies: 2
Views: 556

Re: Iron VH Pushrods

Keith. So VH you don't mention which one and assuming no engine mods Pushrod overaul lengths - measurement is inside the cup to the ball end. From memory I think the inside cup is 5/16 inch but not sure - you need to measure. 1950 - 58 11 15/16 inch alloy head 1939 - 53 11 7/16 inch iron head Ends c...
by robert.clark
Sun Aug 16, 2020 1:44 pm
Forum: Four stroke
Topic: Iron VH Pushrods
Replies: 2
Views: 556

Re: Iron VH Pushrods

Keith. So VH you don't mention which one and assuming no engine mods Pushrod overaul lengths - measurement is inside the cup to the ball end. From memory I think the inside cup is 5/16 inch but not sure - you need to measure. 1950 - 58 11 15/16 inch alloy head 1939 - 53 11 7/16 inch iron head Ends c...
by robert.clark
Sun Aug 16, 2020 1:24 pm
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

Re: VG big end and flywheel assembly

VG wheels sketch.jpg


Sketch of the set up - easier to visualize hopefully.
by robert.clark
Sun Aug 16, 2020 1:17 pm
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 2163

VG big end and flywheel assembly

In the process of fitting a new VG big end (1 15/16inch). Firstly all the parts are unknown to me and have unknown history. This is my first attempt at a rebuild of a set of VG flywheels. The timing and drive steel flywheels are both identified as A7/343S not identified on Roger Gwynns list of flywh...

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