Check out "Tuning For Speed' - has a whole chapter on flywheel alignment. PM me if u want more info
Martyn
Martyn
When I do mine, I am "thinking" of finding some tube or rod the size of some of the holes in the flywheels, Not too tight, Then pressing together.I checked and with new thrust washers and new big end, side clearance looks like it will be fine. Being a Comet crank it's easier to deal with. Pressed the pin into the drive side flywheel, which showed slightly less interference fit than the timing side. Quite happy with the amount of force it took to press it home.
Here I am thinking out loud again.... not having any sort of jig for aligning the flywheels, I'm thinking of putting the drive side into a chuck mounted to the bed of the mill, centring it with the quill, (using the centre in the inboard side of the mainshaft and confirming with running a dial gauge around the circumference of the flywheel) , mounting the timing side flywheel mainshaft in the quill with a collet, make sure it is running true, zero the DRO. Then lower the timing side down (going to try and set the quill up so it is totally neutral) and using a slightly modified puller, get the pin into the timing side flywheel as far as possible, then finish in the press. Feel free to rain on my parade or make suggestions. I think I can get as close this way as using some of the frightening alignment tools I have seen on the inter webs.
Yes Chris, The shafts will be out, Not sure I can bring myself to Tack the wheels !, Is that not against the Vincent Law !!, Still it's only a box of bits !, Not worth much !, Cheers Bill.One method of putting the flywheels together fairly accurately with no special tools is to just start it in the press enough to hold and then use a set square at 90 degrees to the crankpin both sides to line the wheels up. whatever method you use it will almost certainly need trueing after. (I did a Bantam one yesterday and have an ES2 one to do today)
Bill, are you boring new crankpin holes with the shafts out, if so make a mandrill to go through the mainshaft holes and one through the existing crankpin hole, tack weld the flywheels together then knock the crankpin mandrill out and bore as a pair.
Chris.
They are your bits Bill so you can do what you like with them. I don't see that a few small tacks would do much harm as they could be dressed off easily afterwards. Not worth much? Maybe but that is until you need replacements and the "old spares" box under the bench doesn't have any.Yes Chris, The shafts will be out, Not sure I can bring myself to Tack the wheels !, Is that not against the Vincent Law !!, Still it's only a box of bits !, Not worth much !, Cheers Bill.
Thanks Eddy, But if I get stuck, I can always use these !!. I did them when I was young and Silly !, But they did rev high and pull Wheelies, Just when I didn't want to !!. Just a bit of Fun, Bill.They are your bits Bill so you can do what you like with them. I don't see that a few small tacks would do much harm as they could be dressed off easily afterwards. Not worth much? Maybe but that is until you need replacements and the "old spares" box under the bench doesn't have any.
If you can get a mandrill to go through the holes you must have a F**&##@! big crank, can't even persuade a baby lemur to go through mine! By the way, at the Ballarat Rally a few years ago a chap tore down his A.J.S. single, took the flywheels in to a local garage and fitted a new big-end which he had in his kit. He then trued it up with a straight edge, assembled it all in the Caravan Park and rode it back to Queensland. What a HERO!One method of putting the flywheels together fairly accurately with no special tools is to just start it in the press enough to hold and then use a set square at 90 degrees to the crankpin both sides to line the wheels up. whatever method you use it will almost certainly need trueing after. (I did a Bantam one yesterday and have an ES2 one to do today)
Bill, are you boring new crankpin holes with the shafts out, if so make a mandrill to go through the mainshaft holes and one through the existing crankpin hole, tack weld the flywheels together then knock the crankpin mandrill out and bore as a pair.
Chris.