Yamaha vino 50cc 2t exhaust

[Zino]

To set the idle speed
when you dont have a tach
When fully warmed up the back tire should spin slowly
It should run at a speed high enough that keeps the scooter running on its own with out feathering the throttle and keeps the headlights from dimming when you come to a stop .

[luke0000]

So I attempted to adjust the mixture screw, I warmed up the bike drove it around for like 10 minutes and if I let off the gas it wouldn’t idle and just die also it was a little boggy and I heard like a sputter so Im assuming that it is to lean. When I got back home I did as you said in the earlier post and 2 different things happened it would rev up stay there and then drop and die. The other way was I had it idling open the throttle it would do the same and die. Does the main jet affect the idle at all? Maybe I’m turning the screw to much at a time? Not sure if it matters but I’m in Canada and it’s about -16 deg Celsius. Would the outside temperature make it hard to adjust mixture? Also I noticed my back tire is flat, but when it was off the bike it held air, putting weight on it is what made it flat I guess

[aeroxbud]

You need to adjust the idle speed screw first so it can at least idle. It's hard to tell if adjusting the mixture screw is making a difference, if you have no idle.
The main jet doesn't effect the idle circuit. You could even run it with no main jet.

[Zino]

Yes temps like that tend to run things on the leaner side but even then it should not take a 1/4 to 1/2 turn on mixture screw to make it run right .

If this scoot had sat for a while the pilot jet may be partially plugged from fuel deposits you can boil it with vinegar and then blow it out

The pilot jet is easy to plug up

[luke0000]

So Im struggling to get the bike to idle I’ve tried setting the idle speed a little higher to keep it going. That didn’t work. the engine was only getting up to like 90 deg c after riding for 10 min, is it not hot enough? Not getting enough fuel to keep it running? Also there is oil where the exhaust meets the cylinder, should I be worried? Thx

Here is a video of me struggling maybe I’m doing something wrong

youtu.be/T5HTArPvO3Q?feature=shared

[TheScooterJesus]

it sounds like you dont have enough jet

[luke0000]

So I figured out my issue and the bike idles now! Next I want to ensure my main jet is correct.To start the scooter you do need to open the throttle a bit. Any tips on tuning that? I have an 80-102 main jet kit. Right now I have an 80 in it. I attached another vid just to make it easier. Thanks for everything

youtube.com/shorts/IwdlROhwkVM?si=Sg5_XQudk2H9eUY9

[bigmatthew86]

Watch the temp gauge. If it wants to go above 350 keep going up on the main jet until it peaks at or below 350. If it won’t make it that high keeping going down until it does.

[luke0000]

So I’ve been playing around with the scoot and it’s really nice I love it. But the scooter would only get to about 90 deg? I was talking to someone who is ann auto mechanic and said that was normal in the 90-110 range, and 350 would be way too hot, not sure if scoots are much different.


Also I got the malossi over range variatior kit I shouldn’t have to carve the crankcase right? Just got me thinkin. Thx

[aeroxbud]

Your mechanic is thinking of oil temperature I think. Most motorcycles operate between 160°F and 220°F. This is the water temperature.
Air cooled vehicles are different again. They get much hotter at the cylinder head because they don't have a water jacket dispersing heat.

[Zino]

You will have to make some room with a dremel in the crankcase for the overrenge otherwise it will rub and you will lose the electric start .

Air cooled 350 degrees is a good upper range if you ran an air cooled at 90 -110 degrees you would be fouling plugs weekly .

At half throttle 25-30 mph My vinos run in the upper 200's above 35 mph she is over 300

[luke0000]

lol my bad I realized yall were talking about Fahrenheit, I’m in Canada so we use Celsius. So I was about ok with the temp about (194f) I’m gonna go down on the main jet a lil.


For the variator do I have to remove the starter? Because I don’t have enough room to put the variator fan and gear on. The one I bought was Variator Malossi MHR Overrange 2005 Minarelli, model-5112800. It came with 3.5 and 3.8g rollers, I believe earlier you said the 5.5-6g is what I need. Where do I find the correct rollers with the kit. I also bought an Malossi x special belt model 6112741, should I use that or stock, also does my crank look okie?

[Zino]

The directions for the overange in the malossi instructions has you removing all the kick start stuff and using the malossi spacer behind the variator .

You can buy 6 pieces of similar size aluminum foil and fold up and put inside the 3.5 and 3.8 rollers to get them closer to that range for tuning .
For testing you can run them every other one for balance
like this 4/5/4/5/4/5

Just measure the rollers to get the right size they may be the larger ones 19x15.5 size

[luke0000]

So I installed the variator, i didn't notch anything as I didnt visibly see any rubbing (maybe there is idk). I took it around the block and it would rev and take a sec to get into like a 2nd gear and take a lil longer to come back down to idle( Its prob cause I put the 3.8g till I get the heavier ones) should I put the white contra and yellow clutch springs in? or leave it stock? The scooter sounded like it has a bit more of a squeaky loud exhaust not sure if that makes sense 

[Zino]

If you have no belt slip leave the stock contra .

The yellow springs will work much better than stock .
what it will do is have you start out at a higher rpm so you take off closer to the power band of the Yasuni pipe.

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