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I'm going to try to develop a single thread for all my questions for my new scooter. Hopefully, it'll run like a champ and this will be a very short thread.

It is a late 1990's ex Japan 50s. It is all original, ( from the outside ) that I can see, purchased with just over 1k on the speedo.

As a starting point, I have put on new S83 tires, and changed the gear oil.

AFAIK, it is the same bike that rolled off the assembly line. I can't find the exact year because the chassis number does not register with the standard search methods for '63 to '84 bikes. It was imported as a 1970 to take advantage of cheaper vintage registration costs.

I have had it a week and ridden it every day, and it has started on first kick every time, cold or hot. I have seriously not had to kick it twice so far....long may that continue.
First ride photo
First ride photo
⚠️ Last edited by rod_r on UTC; edited 6 times
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Bogging on roll on.
There is some hesitation and bogging when rolling on the throttle.
The plug is a B6HS, and looks to be on the lean side of normal, and the mixtures screw is 1.5 turns out.

Could it be dirty idle jet? I doubt it's too rich based on plug and screw position...
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Bogging right at the beginning of applying throttle, then it speeds up indicates a rich idle.
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I think you are right. According to the stock jetting guide on page 3 of the tips and tricks thread, I should have a 38 idle and 63 main. I just pulled the idle and it's 42....

I do recall reading on the dellorto site that a 16.16 is supplied with 42/74 though. So it could just be a case of the late build date having a standard 16.16 with standard jets....or someone has upped the idle for some reason.

This is where I'm not sure how different a jap 50s is from. '63-'94 50s.....

EDIT

Yes, Dellorto site has 74/42 as standard jets with SHB 16.16. My 1979 102cc kitted 50s also has 74/42 jets, so what that all means I don't know. How can both be right with different piston sizes.

Unless this one has also been kitted...it does seem to go quite well.
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A little something extra
I couldn't resist going in for a look to see what I was running...something I'm always a little loath to do on a scooter that is running well....but hey, what the heck.

I was sure it was running too well to be stock and I was right. So what I have is ;

Dellorto 16.16 carb with 74 main / 42 idle / 50 choke

Malossi 75cc kit

So I'm two for two on scooter purchases where I thought I was getting stock but was actually buying a little pre kitted goodness

I thought I had buggered something up though when I started it up and the revs took off with no throttle. Took me a few minutes to realise I had set the throttle adjuster screw out too far, while I was thinking out was less, but in is less.....more or less.

It's all back together, ticking over nicely on idle....may even be less boggy than before!

So I guess, the question for today is;

Are both my 102cc and 75cc smallframes....running the exact same carb setup / jets....tuned properly?...hmmmmmm
75cc of Malossi goodness, [47mm bore]
75cc of Malossi goodness, [47mm bore]
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Maybe, Plug chops for sure.

The carb is the only variable to dial in the Kit & the exhaust as well as a few other case and flow conditions.

Both kits and exhausts are not equil and the tiny displacement difference may make no difference at all. It's more likely that the porting and exhaust are the difference. So yes, they could be both just fine.

Lovely scoot by the way. I really want to do a smallframe right now.
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NICE! I love discovering something 'extra' buried on a new scoot that the seller wasn't aware of.

Rod, sort your jetting to get the best you can of out what you have, but maybe start thinking about getting a 19/19 carb or even a 20L(SIP have them) and manifold, at least for your bigger motor.
Get a box set of jets too & you'll be in business.
The bigger carb helps a lot.

External inline image provided by member with no explanatory text
That's yours on the left, so painfully tiny
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Are you still trying to flog those 19's?...what, you got some surplus you're trying to sell LOL

Ok ok....I'm putting together list of bits and pieces, a 19.19 might just make the short list.....and some jets......but only for the 102...
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Seriously though....voodoo if you're still watching.....will a 19.19 provide more torque?
On the green machine, the 16 cog upgrade has lengthened 4th gear. If the Serie Pro exhaust is more revy than torquey, would a 19.19 carb balance it back towards the torquey end of the scale?

I guess what I'm trying to ask is, with the longer gearing, do I want to look at getting more power via bigger carb and a power based rather than revy pipe to
Balance it up better.

As you can tell, the whole rev vs torque vs exhaust vs carb thing is not my strong suit
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having a upgrade plan is key
balancing the parts is important
setting them up so they don't go BOOM is great
carb jetting is not too easy
then you move onto carb, porting, larger kits, stronger clutch, taller gearing and better ignition / crank...

and so on and on and on and on
at the end the case is the only OG part left
Laughing emoticon Laughing emoticon

once you do get that all done your'll be rewarded big time

here is my latest buy:
KEIHIN PWK Air Striker 35mm
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That looks fairly serious. What do all the tubes do?
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New Streamline Seat
I bought this seat for my other 50S, but since it's not running at the moment, I have installed it on this scoot.

The quality and fit are what you would expect from German design + engineering. A couple of other things about it;

1. It's pretty firm to sit on. It's a bit like running low profile tyres or sport suspension on a car compared to normal. I like the sporty feel it provides, and I only ride short distances, so I'm ok with it.

2. I think it changes your riding style a bit. It's quite a bit thinner than the stock ET3 seat. I've just been out for a first test ride and felt I was sitting lower but further back on it....again felt more sporty.

Guess that's why they call it a sport seat
"Sideboob shot"
"Sideboob shot"
New "ass" shot with whoopee photo effects
New "ass" shot with whoopee photo effects
⚠️ Last edited by rod_r on UTC; edited 1 time
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My fav small frame seat.. Looks Killer Rod!
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Rod,

I need one! Can you post that link again?

Also can you post pics of the onderside of the seat?

Seb
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sebastianfrith wrote:
Rod,

I need one! Can you post that link again?

Also can you post pics of the onderside of the seat?

Seb
+1

Love it! 8)
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Streamline Seat
Holger is the guy. He deals through FB. Just send him a message.

As has been said about these seats, if you are someone who likes to tweak their carb every 5 minutes, it's not quite as easy to just flip the seat up, and as also has been said, you don't just wanna put it down on a dirty floor.
Bottoms up. You first adjust the 4 rubber feet so it sits just above the frame
Bottoms up. You first adjust the 4 rubber feet so it sits just above the frame
Then you replace tank bolts with adjustable studs. You have to fiddle a bit to get it right. The front bracket is for the seat lock
Then you replace tank bolts with adjustable studs. You have to fiddle a bit to get it right. The front bracket is for the seat lock
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Ya man, who needs cupcakes with the sleek clean lines of that seat! 8)
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The fit of that seat is awesome. I see one in our future.
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Mmmmm that's one sexual seat there! Looks good

Did you ride thru he tunnel under the motorway to get that shot Rod? It seems too far round for Bayswater but not far enuf for under the bridge?
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Nah, that's Bayswater wharf, looking across to Stanley Point. The wharf area and carpark are only about 300m away so make an ideal testing ground anytime I tweak, I mean stuff something up....I can just walk it home
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New seat looks awesome, rod! 8)
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2wice
the seats do fit nice but the blokes a cunt
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Ah I still remember him trying to hawk his wares on sbw
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need more
now that was funny ..... dont think hell be back there there are rules n he didnt so he got the full force
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Re: 2wice
T5bitza69 wrote:
the seats do fit nice but the blokes a cunt
Maybe......but it got my attention
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Re: Streamline Seat
rod_r wrote:
dirty floor.
Huh?
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Re: Streamline Seat
sebastianfrith wrote:
rod_r wrote:
dirty floor.
Huh?
Ok....DUSTY floor
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are we actually talking about setting this seat on the floor? or is this code for something else...

I don't see a hinge, so every time you fill the tank you need to take off the seat?
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sebastianfrith wrote:
are we actually talking about setting this seat on the floor? or is this code for something else...

I don't see a hinge, so every time you fill the tank you need to take off the seat?
yup.

If you set it up right, it pops off easily enough, but yes, you have to put it somewhere while you access area under it.

Vader has owned one for a while so he might chip in on how that functions, but between cleaning it and dismantling his engine again, I'm not sure he has had to fill it up yet LOL
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Love your new scooter, I plan on getting a small frame someday? Hmm maybe today.
I love this black and white shot because it doesn't really change the color of the scooter.
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^^^^ thanks....I was just messin' around with a free ipad app for photo editing
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deleted.
⚠️ Last edited by culturesponge on UTC; edited 1 time
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Decent Rack
I'm on the look out for a decent rack.....yes, aren't we all.

The main use for this scooter is to go to the supermarket or fruit + vege shop. I go a few times a week, and can just about spread the weeks shopping over those days.

I have been using a back pack but I really need a rack, but I don't particularly like the look of them, so looking for something cool. I guess it'll need the ability to fix a bag to?

What's available for a smallframe, preferably without needing to drill new holes....

( note that the streamline seat is going on the green one as soon as it's running )
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Sip used to do one like this http://www.classic-racks.co.uk/rear-racks/ I can't find it on there site now but personally I love it.... maybe a bit small but looks the dogs.

Are you gonna get rid of that tail light? Please say yes
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poetry
just had a proper look at ya scoot n its sweet.. but is that rear light right .... im all for swapping n changing but sleak on a 50 not hoooooge px jobbies or is it a v50 light? .... all the same i dont even like px lights on a px thats why ive changed both mine ...

anyone wanna t5 classic light to help fund some black rattlecans
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I got your rack right here
Sorry Bitz, that's the stock Euro lite for newer smallies from what I've seen.
Same lite was on my first Vespa('78 50s) when I found it and that one I know was all original.
Here's your rack for your trips to market, Rod, and it's hell for stout!
No charge except freight(but you gotta wait a bit). 
What's shipping from Greece?
Here's your rack for your trips to market, Rod, and it's hell for stout! No charge except freight(but you gotta wait a bit). What's shipping from Greece?
I took it off cuz I thought it was ugly
I took it off cuz I thought it was ugly
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sweetening
well there ya go ..... i did wonder if it was a v50 light as they where massive like a px .... i think they used the rally light on the v50 too the one with the 'lid' ....
yes i know its not a v50 .. just saying
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Right light
Yeah, it's original for ex jap scoots.
I take ya point though......I really wanted to keep this one stock

BFR, I really like those racks but wonder how much use if would be

Voodoo, I might just take you up on that offer. If I can't find beautiful and practical, I may have to settle for ugly and practical

The streamline seat was about 40 euros from Germany, so shipping may be similar?
Pic of stock late '90's Jap 50S
Pic of stock late '90's Jap 50S
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Found rack
I was over at the vespa guys warehouse today and he dug out an old rack ang gave it to me. It's pretty rusty as you can see, so I have a couple of questions.

1. Options to refurbish it. As is / tidy up / re-chrome / blast and paint ?
2. The spring is quite stiff, so what's the deal with using it? Do you strap a box on it, tie a bag to it. Mmmmm?
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Good quality chrome here in aucks is crazy dear.... otahuhu chrome platers are the best with enough power to throw on a good layer but be prepared to pay procoat have a few powder coat options that are pretty stylie.
Try a oxalic acid bath to.... Google restoring bmx chrome to get the lowdown, there's also a product called grunt emergel that is a brush on hose off product that will remove rust.
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