Modern Vespa

I've been saving old dead varnished gas for cleaning engine parts. I'm not a fan of brake-clean. It seems like whenever i use that stuff i end up with some in my eyes...but that's just user error i suppose. There's also a high probability that you won't survive covid. I reccomend that you spend your last few hours on earth giving away all your scooter possessions. I can PM you my shipping address.

I will bequeath only the finest Kajiit treasures to you. 10 year old tires and rusty rims will abound. Please send mailing address and advance shipping cost to me by PM. The shipping cost will seem high but remember that it is expensive to ship a treasure horde...

I'll contribute a large horde of crusty tires and rims to this fund.

if it's smooth, then I'd guess it's just gummed up with old 2t.

Hit it with brake parts cleaner and see if it gets better. If so, then I wouldn't worry about it too much.

If it doesn't get better, some sort of mechanical interference is going on and you need to figure that out, because Resistance == Friction == Heat == Sadness.

Brakes Parts cleaner is just the thing in this case, because the force of spraying will force the crud out of the bearing. Hit it with some WD-40 afterwards to add a little bit of coating to prevent rust.

+1 on the WD40 as a cleaner…

All better

I'd run that

hell yeah, it was a freebie trade with mjrally for unwanted stella bits (electrical stuff)

it should be fine for the job at hand.

there will be at least one parts order coming, I see that I have no notched pressure plate for my 7 spring clutch. honestly i should be using a 6 spring for this job but I only have one that isn't all blown up and it's a 22 tooth, which would never work for the gearing. As is, the PX125 later gearing with 21 tooth 7 spring clutch is more or less like an early PX125. A 20 tooth is what belongs with it but this will have to do.

You could just grind a flat spot on a round pressure plate, too. I ran one like that for a couple years in my Stella.

No shit, really?? I have round ones.

J-money check the Bajaj motor bits and bobs, I'm fairly certain I threw an extra pressure plate in there.

shoot me text with the clutch gear you want/need and lemme see if I can dig one up. I have a few that a guy flaked on buying that might suit ya

like CM, I'd totally run that crank!

Kajiit delivers

Gearbox sitting at .2mm = good

Obligatory photo to know you put the kickstart gear in.

And cases closed

john's over here makin' moves!

(cracking up at my writing on the clutch)

As usual I had to stop a couple times along the way to watch Sausage put those 2 p engines together again 😀. I hope that guy gets a kick out of people using his videos if he's looking down from heaven.

Awesome man… so good to see more progress on the engine.

Gearbox looking good!

Ordered tonight - 2 sets of rings for stock 125 top ends I have sitting around
small end bearing
shock bushing - I should change the front too but f that noise
ball hone to hone the 2 stock 125 top ends I have

I hate to use unknown top ends with unknown condition rings on unknown condition bores. so I decided to man up. at least I can split the ball hone expense over 2 top ends.

New clutch plates - they don't fit. See the problem?

At least the new corks are ok.

No reason not to use the old steels if they're not warped.

yup. i've even started saving old clutch corks, the quality is so random these days it's useful to have something to pull out if the top plate won't fit, etc.

100% this.

I only get original steels for this exact reason. They always fit…

So I went to do the selector box and then started the gear selection exercise. I always hate this part. Sure enough, it wouldn't pick neutral properly and the 4th wouldn't select. Also, there was a binding as you spun the rear hub at certain parts of the rotation. Ugh.

Some detective work with washers and extra gaskets said shimming the selector box should make it happen.

I popped the cases back open and everything spun smoothly, no binding. I figure layshaft then. So I popped out my drift and hammered it home some more towards the hub bearing. Reassembled and it stayed smooth. Nice.

Was hoping this might be the ticket on the shimming issue too, but no such luck. I dug out my stash of gaskets. How many gaskets does it take to make this box select correctly? All 3 that I was lucky enough to have. Gonna put 5 of those in my Mercato cart. All selecting well now.

Probably should order these just in case:

https://www.sip-scootershop.com/en/product/spacer-kit-drt-selector-box_92223000?cr=e993ab67-6807-4109-bbed-f6374ebf9f9b&gclid=Cj0KCQjwsrWZBhC4ARIsAGGUJuqSJyusbneVmLaF1Yl5Z-uePRWdLMQF9r4XGTk_A_DyFlNgavqEJqkaApfXEALw_wcB

Sounds like the selector box has too much play.

Possible to overhaul?

I tried pulling the shaft in a bit further yet by doing up the hub after seeing another thread. It seems to have helped. What do you think?

Have you taken a look what your shift cross alignment looks like?

I went back to your post on this. I swear to God I never knew you could use the crank puller to pull in the layshaft. Why am I beating it with a hammer? They show it in that SIP video .

https://modernvespa.com/forum/post2572071#2572071

OMG you can even use it to install the fly side collar on the crankshaft


I had no idea what the adapters were for

Lol… yeah it's a godsend… I don't bash any shaft now.

Pull and push is less stressful

If you have the correct thread adapter, I had to order more adapters as mine didn't have the correct one out of the box for a P200.

That crank puller is one of the most useful tools you can get! Now that you've seen The Way, you'll realize that you can use it all over the place. Combine it with the cups from the larger bearing pullers and it'll pull stuff where you otherwise wouldn't have a pressure point, too.

I've used it to pull pretty much every rotating part of a motor at one time or another, as well as front axles.

It's an awesome press for bearing and clutch races. Get that race right where you want it, every time.

On this smallie project, I used it as an improvised clutch press when I had to remove the egig clutch after it was in the bike, even.

I didn't do it before, just to answer the question. Now that I see how easy it is to do, I would do it next time for sure. I'm pretty sure we already know the answer is that without 3 gaskets, it's not great. I'm honestly thinking a 4th gasket might be the best answer. I'm concerned about leaks though. I'm guessing getting those selector box shims is probably the "correct" thing to do. If I remember right the SIP blue gasket version is thicker, but I'm not sure if anyone stocks them.

Scooter speed usually has them.

Stator and flywheel time.

Stator on the top is the bullshit one that wouldn't run in my Stella engine. Ohms out perfect, likely an LT coil or pickup. The one on the right is from Kajiit. Some dork cut all the wires short. WTF? I'm thinking easier to extend the wires on the Kajiit one and roll the dice.

Flywheels. One on the top is from my P200. Ran fine but broke up at like 8000 rpm, which shouldn't be an issue here. The lightened one I will save for the Stella engine. I guess if my p200 one gives me shit I can use the one on the bike now.

Extensions added, sheathing to clean up the look.

Btw chandlerman for the win on these

waiting on orders, so took the time to look ahead and see what's missing on the stuff I haven't yet put on. it's hard to believe what a cluster the situation is when you inherit the parts from 2 non-running bikes, neither one of which was completely together. Tons of stupid carb box area parts missing, junction box since I converted both engines to PX style AC electrical, plug lead, spare CDI. I found out I have no o-ring for the clutch cover. Just a ton of stupid small items that are already over $100. It was no big deal when I only needed one engine out of the 2, but now everything has to be here. But at least they will be after my ball hone arrives and I button that top end up.

well I got my rings today, still waiting on the ball hone. I also got what I thought was a rear engine mount but on closer examination it's a shock mount? where would this thing even go? I've added the correct part to my growing order.

https://www.scooterworks.com/Rear-Shock-Bushing-OEMEngine-Side-VespaPPXVSXVNXVLX