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dickie wrote:I'm digging around in my head to remember the issue I had with my 4 speed close ratio box. But either 2nd or 3rd gear was tight. I would definitely have been able to make it work, but if I had, it would have caused excessive radial force from the loose gear onto the layshaft; this in turn would have caused the lip that you mention. Also, it was not constant, it only occurred when a particular point on the loose gear coincided with another particular point on the cluster.
I can't be certain, particularly because I can't remember which gear was a problem, but if the same one, then I'd be confident that the gearbox had damaged the layshaft rather than the layshaft itself being an issue. Once there was a groove worn in, then the other problems, like a rattle, would be a result rather than the cause.
.......my pennerth worth.
Storkfoot wrote:The biggest meshing issue on my AF was third gear not second, although that was far from great.
dickie wrote:Storkfoot wrote:The biggest meshing issue on my AF was third gear not second, although that was far from great.
And thinking about it, that would cause damage right around the layshaft not just one side.
But looking at your layshaft, it must be caused by either excessive force being applied by loose second gear when you're in another gear (therefore it's rotating relative to the layshaft, OR a particularly soft layshaft. The second option seems less likely to me as I find it unlikely that it would be restricted to one gear only.
Which leaves the question about which gearbox was installed when it happened.
Obviously that's not an answer in itself but hope it helps clarify thoughts.
hullygully wrote:have you measured the o/dia of the 2nd gear bud?
Storkfoot wrote:hullygully wrote:have you measured the o/dia of the 2nd gear bud?
Thanks for this post. Second gear is the correct size but first gear isn’t, it’s 115mm and not 117.5 as it should be. Hopefully, replacing that with the correct one will remedy both the grinding between first and second gears and the rattle on idle.
If anyone has a 50 tooth first gear, 117.5mm diameter, they wish to sell please get in touch.
Storkfoot wrote:hullygully wrote:have you measured the o/dia of the 2nd gear bud?
Thanks for this post. Second gear is the correct size but first gear isn’t, it’s 115mm and not 117.5 as it should be. Hopefully, replacing that with the correct one will remedy both the grinding between first and second gears and the rattle on idle.
If anyone has a 50 tooth first gear, 117.5mm diameter, they wish to sell please get in touch.
roli150lam wrote:Storkfoot wrote:hullygully wrote:have you measured the o/dia of the 2nd gear bud?
Thanks for this post. Second gear is the correct size but first gear isn’t, it’s 115mm and not 117.5 as it should be. Hopefully, replacing that with the correct one will remedy both the grinding between first and second gears and the rattle on idle.
If anyone has a 50 tooth first gear, 117.5mm diameter, they wish to sell please get in touch.
i have one,it has several chipped starter teeth tho.
are you going to milnthorpe?i could bring it there with me.
Leotech wrote:My mate had that gearbox in a fresh built motor and when it ran it made a knock knock knock noise, we took it apart and one of the gears you couldn't turn the gearbox by hand turning the clutch spider. It just went insanely tight.
We rang up to ask what to do, return it etc? and they said just grind a bit off where it was tight!
We took it out and put a SX200 box in and the close ratio thing was history.
Leotech wrote:I may have a 1st gear. I have a pile of one size. I've no SX200 / TV175 ones I looked for one other week for someone.
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