Gasket for silver case Tomos A3 question

Hey guys, I’m new to mopeds and got my first one the other week (1980 Tomos A3 bullet) and I want to open the case to make sure nothings wrong with my clutch.

I read a post saying that the silver case has 2 piece crankshaft bearings so the bearing clearance depends on the gasket thickness and then went on saying he wrecked his bearings the first time he opened his case up. Is this true? I ordered the gasket set made for the a3 from treats but now I’m nervous haha please let me know if there is something different I should try other than what I ordered.

Thanks!

Re: Gasket for silver case Tomos A3 question

lucky u.. removing the clutch cover and inspecting removing clutch stuff does not require splitting your case. it is good practice to change out your crank seal while your in there.

take a look at a diagram.

Re: Gasket for silver case Tomos A3 question

Wait really? I feel like every pic I’ve seen, the right side of the case is taken off showing the clutch and gears.. I was going to do it tomorrow morning lol so I’m confused then on how to inspect them. Also do you know if the gasket will work for the silver case? I can’t imagine less than a 16th of an inch could make it too tight for a bearing..

Re: Gasket for silver case Tomos A3 question

♣Slew Foot♣ /

The older A3 is like that are easy if you ever do have to split the main engine it will just come right apart the bearing races won't move from their places and all you really have to do is replace the damaged part of the bearing which could be the inner or outer race and then put in a new set of bearings that are on a ring spacer easy peasy Iggy get the gasket kit for an A3 from treats or Myron's better yet get the manual and study up on it

Re: Gasket for silver case Tomos A3 question

U need to remove the clutch cover.. splitting the case is a whole different animal

Re: Gasket for silver case Tomos A3 question

Ok so I think I’m just having a misunderstanding. In the manual they call it the crank case. That’s the same thing as what your saying the clutch cover is, correct? I just want to make sure

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Re: Gasket for silver case Tomos A3 question

Just close the book, roll up your sleeves and take the damn clutch over off.

Re: Gasket for silver case Tomos A3 question

> pat splat Wrote:

> -------------------------------------------------------

> Just close the book, roll up your sleeves and take the damn clutch over

> off.

This^^^^^^

Re: Gasket for silver case Tomos A3 question

Carefully remove the cover and keep track of any shims (sometimes they stick to the inside of the cover). Might as well replace the crank seals while you're in there, especially if you're going to pull the clutch.

Re: Gasket for silver case Tomos A3 question

Lol funny you say that. I took off the cover and all the shims stuck to it.. 2 of them (the two thickest ones) stayed in their place though but the two thinnest ones did not and fell to the bottom of the cover as I slid it off. I looked at the diagram to see where they should go but couldn’t figure it out.. does anyone know which shaft they go on?

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Re: Gasket for silver case Tomos A3 question

worry about that later, take the cluch off.

Re: Gasket for silver case Tomos A3 question

Will do. The nut was so tight on there that I ordered one of those clutch/flywheel clamps to get a hold of it. Will report back once it comes!

Re: Gasket for silver case Tomos A3 question

All those shims have a big ID so they're probably all off of the pedal shaft. Sometimes there might be one on the end of the gear cluster shaft but it's noticeably smaller.

Re: Gasket for silver case Tomos A3 question

Thank you! They also fit over the bearings but for some reason I just don’t think they’re supposed to go on there. I know 2 were on the pedal shaft and I have a feeling the other two were also on there.

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