Sears SR125 Restoration

Hi All!

Since this ins't exactly a moped I figured this was the best forum to post a build thread in.

So a short history; I received this motorcycle probably 2.5 years ago from a really nice guy in NY who just didn't have the funds/means to finish it. The PO drove it all the way from NY to CT knowing I would take care of the build and keep the bike for myself, not a flip.

As you can see from the photos below it has a nice patina and was seemingly used for maybe 2-3 years after the Original Owner bought it and then stored it. The engine was unfortunately seized up but the rest of the bike is in pretty darn good shape.

The chrome is pitted and the throttle assembly is frozen but the brakes worked amazingly.

I'm hoping to go through this like a barn find moped, taking care of safety pieces like tires as well as rebuilding the motor. This weekend the plan is to do some slight disassembly and cleaning of the bike to get it ready to accept the rebuilt motor this winter (assuming Motorwest gets back to me I hope to rebuild the motor over the winter).

The motor was really messed up. Piston was seized so badly in the cylinder it had to be pressed out and the cylinder had to be TOTALLY restored. They bored and sleeved the cylinder to match my new piston as well as added material and resurfaced the cylinder and even added a piece of fin back. It needed A LOT of work.

Things stalled a bit after that as the owner of Motorwest is ill and has fallen behind in orders, as well as the crank they sent me was unusable due to damage , so that needed replacing.

I hope you guys enjoy the photos and this build. It wont be a often updated build until I get the engine parts but I will post more photos after the clean up.

I got really lucky with this bike in that the seat AND tank are in amazing condition and don't need any restoration at all. Tank looks like it has never even been used inside.

Also worth noting this will be my first real motorcycle and I hope to learn how to ride using it!

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Re: Sears SR125 Restoration

Couple more photos here, last one was when the PO got it (I never received it with the engine mounted, the engine was in a box for me)

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Re: Sears SR125 Restoration

Pushrod Fifty /

Thats a cool bike. Looks like it was made by Puch. Does it say Austria on it?

Re: Sears SR125 Restoration

> Pushrod Fifty Wrote:

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

> Thats a cool bike. Looks like it was made by Puch. Does it say Austria

> on it?

Probably on the plate. It was imported by Sears in the US but was sold as the Puch M125 in Europe.

Re: Sears SR125 Restoration

There's a good chance that the plating was flaking off the cylinder walls, causing corrosion to grow aluminum to aluminum.

Re: Sears SR125 Restoration

Just a bit of spit and polish , it'll be good to go . ;)

I'd ride it .

Re: Sears SR125 Restoration

> P D Wrote:

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

> Just a bit of spit and polish , it'll be good to go . ;)

>

> I'd ride it .

Besides the motor, that’s basically all I want to do. Replace what must be and leave the rest!

Re: Sears SR125 Restoration

Just a brief update. After much work I’ve finally been able to get back in touch with MotorWest. They’re sending me about $700 in parts to complete this project.

Once I get everything in I’ll be starting the engine rebuild, partially to ensure everything I ordered is correct. I’m hoping to get it finished and installed over the fall/winter and have the motorcycle ready for next season.

While I did order a ton of new brightwork for the bike (basically every bit of chrome that was pitted/rusty), I plan to just store it until a time where I can do a full restoration of the motorcycle back to showroom condition.

For now, crusty but functional is the theme, especially since this is my first motorcycle and I hope to learn how to ride on it(assuming that isn’t a horrible idea but it is fairly lightweight and low in power).

Re: Sears SR125 Restoration

Saw one of those in a motorcycle show a long time ago. Nice looking bike.

I attached it here for motivation.

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Re: Sears SR125 Restoration

there is a sears allstate group on facebook also that is very knowlegable,I have a 175cc, I am planning on getting running.

Re: Sears SR125 Restoration

Pushrod Fifty /

Motorwest has been slow to ship. I placed an order a week ago and havent got shipping confirmation yet.

Re: Sears SR125 Restoration

> Pushrod Fifty Wrote:

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

> Motorwest has been slow to ship. I placed an order a week ago and havent

> got shipping confirmation yet.

Matters health Is really bad. I had organized a quote with him a year ago and didn’t hear back until two days ago; thankfully he sent the invoice yesterday so now I can happily wait for it to ship.

I tried to order every part I could possibly need. Especially since he’s trying to sell the business.

Re: Sears SR125 Restoration

Pushrod Fifty /

Thats unfortunate I hope the best for him.

Re: Sears SR125 Restoration

All the parts came in today. Unfortunately the wife and I are being kicked out of our rented home(landlord is putting it on the market).

We are closing on a house but assuming all goes well, I probably won’t get to work on this project until the second week of December.

Mega bummer but I’ll update when I start the process!

Re: Sears SR125 Restoration

> Aaron Goldman Wrote:

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

> All the parts came in today. Unfortunately the wife and I are being

> kicked out of our rented home(landlord is putting it on the market).

>

> We are closing on a house but assuming all goes well, I probably won’t

> get to work on this project until the second week of December.

>

> Mega bummer but I’ll update when I start the process!

Good luck with the 'new' home . :)

Re: Sears SR125 Restoration

I wouldn't call that a bummer man. I mean getting kicked out yeah, but closing on a place is great.

I say congratulations are in order, yaayyyy

I dream of owning a home, only problem is that I'll need to move a few states away to afford it.lol

Re: Sears SR125 Restoration

Dockyard Matey /

My website, www.puch-m125.org.uk, may be of help to you. I've taken the liberty of including a link to your Restoration on my site as I'm sure it will be of interest to many people. I can remove it if you object. (E-mail address is on website). If you'd like to include your bike in the M125 Register, please send details and I'll add it. Good luck with the restoration, it looks like a good bike.

Re: Sears SR125 Restoration

Finally time for an update. Basement ship is set up in the new house. I have begun the process of rebuilding this motor. So far just removing some bottom end internals and whacking out bearings.

Praying all the parts are still here, previous owner wasn’t exactly a genius with this kind of stuff. Attaching some photos below of what I have.

Almost totally stripped down the right side crank case, however, the big crank bearing doesn’t want to budge.

All I have for a guide on this is an old magazine that doesn’t quite go as far as I need into disassembly but I think I’ve got most of it covered.

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Re: Sears SR125 Restoration

Getting closer to full disassembly but I’m sort of stuck right now.

There is about 4 bearings I can’t get out without a proper tool and the manual speaks of factory tools which I doubt I will find.

Any tips on what I can do? Universal sets anyone would recommend? I’m going to have similar issues when installing the bearings I’m sure.

Re: Sears SR125 Restoration

If these are case bearings , just heat the cases to 400° for about 15 - 20 minutes .

The bearings will likely fall out .

Reheat the cases when you want install bearing . They will likely just drop into place .

My '57 Simplex required the heat treatment or ruin the cases .

It worked a charm for me . ;)

Re: Sears SR125 Restoration

> P D wrote:

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

> If these are case bearings , just heat the cases to 400° for about 15 -

> 20 minutes .

>

> The bearings will likely fall out .

>

> Reheat the cases when you want install bearing . They will likely just

> drop into place .

>

> My '57 Simplex required the heat treatment or ruin the cases .

>

> It worked a charm for me . ;)

Not a bad idea though I’d have to get a spare toaster oven so my wife doesn’t shoot me.

I did get recommended an arbor press for the bearings I can push out on one side.

Re: Sears SR125 Restoration

> Aaron Goldman wrote:

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

> > P D wrote:

>

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

>

> > If these are case bearings , just heat the cases to 400° for about 15

> -

>

> > 20 minutes .

>

> >

>

> > The bearings will likely fall out .

>

> >

>

> > Reheat the cases when you want install bearing . They will likely just

>

> > drop into place .

>

> >

>

> > My '57 Simplex required the heat treatment or ruin the cases .

>

> >

>

> > It worked a charm for me . ;)

>

> Not a bad idea though I’d have to get a spare toaster oven so my wife

> doesn’t shoot me.

>

> I did get recommended an arbor press for the bearings I can push out on

> one side.

I used a small tabletop grill . It was a bit tight but , it worked .

I think you'd be best to use the heat rather than trying to press them out .

Using heat simply expands the metal without the possibility of changing dimensions of the fit when cooled .

Pressing may well do damage to the old cases .

Re: Sears SR125 Restoration

Pushrod Fifty /

I would try pb blaster and a heat gun. Too much heat can warp the cases and mess with the heat treatment of the aluminum.

Re: Sears SR125 Restoration

> Pushrod Fifty wrote:

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

> I would try pb blaster and a heat gun. Too much heat can warp the cases

> and mess with the heat treatment of the aluminum.

Hopefully I haven’t destroyed anything yet! I was hearing with a map torch but absolutely no change. Things look okay and honestly I doubt I got it even close to operating temperature.

I might just try grabbing the bearing puller kits at harbor freight before going the heat route.

Re: Sears SR125 Restoration

> Aaron Goldman wrote:

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

> > Pushrod Fifty wrote:

>

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

>

> > I would try pb blaster and a heat gun. Too much heat can warp the

> cases

>

> > and mess with the heat treatment of the aluminum.

>

> Hopefully I haven’t destroyed anything yet! I was hearing with a map

> torch but absolutely no change. Things look okay and honestly I doubt I

> got it even close to operating temperature.

>

> I might just try grabbing the bearing puller kits at harbor freight

> before going the heat route.

If you're really gonna chance a puller , go rent one for free from an auto parts store . The quality makes the difference .

Re: Sears SR125 Restoration

That is a cool looking bike, and if it was made by Puch it is high quality. Sure looks great compared to the plastic computerized garbage they are making today.

Re: Sears SR125 Restoration

I ask a scooter question, and my thread is banished to Off Topic. This bike is clearly a motorcycle, and yet here we are still in General Discussion. Whose cock did you suck?

Re: Sears SR125 Restoration

daan SJAARLOOS /

Puch motorcycle thread in general discussion = not okay but okay. Like smoking weed when your 15.

Scooter thread in general discussion= like killing little kittens. Pure evil. The Hitler of threads

Re: Sears SR125 Restoration

> Trent Anderson wrote:

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

> I ask a scooter question, and my thread is banished to Off Topic. This

> bike is clearly a motorcycle, and yet here we are still in General

> Discussion. Whose cock did you suck?

Haha it's like the Honda Navi thread! That ugly pos has got way more posts than any vintage moped post lately. Just gotta go for the wfff!

Re: Sears SR125 Restoration

If you're gonna put new bearings in, just get a socket or piece of pipe the size of the inner race and beat them out with a hammer. That's how I do it.

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