Triton # 2 (T2) 49cc to 110cc & Nearly Everywhere In Between

[90GTVert]

I've been screwing around with slider weight tuning today. I'm still not done, but getting closer anyway. I started with 10.75g, then 11g, then 11.5g, then 12.5g. About 1.5g of foil stuffed into these was enough for me. I'm sure they could take more, but it gets to be a pain trying to pack the foil into the sliders. Since the 7g sliders are of no use to me with this setup, I used solder to make a set of 3 12g and 3 13g sliders out of them.





There are definite gains with the 11.5 and 12.5g sliders vs the numbers above from 10.75g.

11.5g
0-30MPH : 5.2 seconds (-0.1)
0-35MPH : 6.6 seconds (-0.2)
0-40MPH : 8.6 seconds (-0.4)
0-50MPH : 16.3 seconds (-2.2)

12.5g
0-30MPH : 5.2 seconds (-0.1)
0-35MPH : 6.6 seconds (-0.2)
0-40MPH : 8.6 seconds (-0.4)
0-50MPH : 16.0 seconds (-2.5)

You can see big gains in the 40-50MPH section from keeping RPM lower. Still I'm not seeing any real speed improvements. Before the times runs I did my usual runs up and down the road over about 1/2 mile. With the 10.75s I did 53MPH @ 8700RPM and 56MPH @ 8850RPM. With 11.5s I recorded 53.5MPH @ 8600RPM and 57MPH @ 8900RPM. With 12.5s it went 53MPH @ 8300RPM and 57.5MPH @ 8600RPM. It looks like it runs out of steam much above 8500RPM and the gearing keeps me from going faster since it doesn't want to over rev.

Next time I plan to try 12g weights and see where that gets me. The numbers are still far from impressive but overall the best times from these last runs show these improvements vs my first check of the setup after the car show :

0-30MPH : -0.4 seconds
0-35MPH : -0.2 seconds
0-40MPH : -0.5 seconds
0-50MPH : -2.1 seconds

At least I haven't gone backwards... yet. The gearbox is making a lot of noise again. I need to spend the time to try and get that primary drive shaft shimmed properly now that I'm not in a time crunch to make it anywhere with the scoot.

[oldgeek]

What contra spring are you using with these heavier variator weights?

[90GTVert]

Some old used generic 1000RPM. I need something kinda stiff to get rid of the belt slip and slop, but soft enough that I don't need even heavier so this is about the best I have here. It's got some torque... even if it doesn't show in my accel numbers.


I went out tonight to get 12g sliders installed so I could ride early if I feel like it tomorrow without having to work on the scoot first. I noticed that the tire looked low. Checked and it was at 15psi. I found a small hole just off to the side of the center of the tread and plugged it. Hopefully it'll still be inflated tomorrow. I have a replacement here, but whenever I mess with the gearbox I will have to have the tire off so I'd rather do it then and not before figuring out what sliders to use.

[90GTVert]

Here's a quick clip from after a 0-50 run rolling up to a stop sign with the 11.5g in there earlier.


youtu.be/3_rJT2MLdng

[niz76]

Aww yeah! power wheelies!! Not an easy accomplishment for us big guys!

[90GTVert]

It was colder and humid this morning so I waited till it warmed up and dried out a bit to go for some 0-50 runs with the 12g sliders. Thought there may be some burnout action too, so I mounted a rear facing cam. Sadly all it captured was a flat tire when the plug I put in last night came out about 6 miles from home.



I pushed about a mile, gave up, and called for a ride. The new tire is on and the wheel is clean. I may have to take it down a dirt road on the first ride so it doesn't make the rest of the scooter look bad.... well, worse.




I took the gearbox apart. The primary drive gear is still secure in the bearing. Prob a little too much play in the bearing, but I'm not sure yet if I have another. It looks like it's been spinning in the case.




Seems to be something like 0.0005" or less of interference fit. It doesn't push in and out of the case easy, but it's prob not as difficult as it should be. I guess I'll try shimming it and see if it's too tight or not then.

[Jwhood]

Hey Brent what's the biggest wheel you can fit on your 90,and is the engine I bought same engine as the one your running or similar??

[90GTVert]

You got a short case, mine's a long case. Short cases mostly use 10" wheels. If they go to 12" then it must be a low profile tire. I'm not sure what the largest wheel/tire combo I could fit is. Stock is a 130/70-12. This is a 120/80-12. I've used a 140/70-12 once in the past. There's room for more height.

[90GTVert]

I got the bearing/shaft in and shimmed after a fight. The bearing was secure on the drive shaft, but it seemed to wobble too much. I decided to swap it with a spare bearing. After multiple fails, I finally got it on so it was secure. It still wobbles too much with a new bearing for my liking.

Finished that and then moved on to shimming the case. That was yet another struggle.

I put the gearbox together and then realized I forgot the clip on the drive shaft. I thought I could just pop the seal out and then install the clip from there, but I can't find a spare seal so I didn't want to risk messing it up trying to get it off with the shaft still installed. I ended up taking it back apart and then having to go through the shimming process again, once again with multiple failed attempts. I didn't even bother the put the gearbox together again. I'd had enough of the gears by then.

[oldgeek]

Some days...

[90GTVert]

It gets better. I just screwed up big time. Ended with me pushing the scooter 1.5 miles and some serious carnage. Should be interesting to look at. I'm not even gonna post pics right now because I'll see if I can get a vid together so you can really see how dumb I am. Stay tuned, it'll take a while to get something up.

[Jwhood]

??

[oldgeek]

As long as there was no involved.....

[90GTVert]

I'm totally fine, other than being aggravated, nothing that bad like a crash. Vid is rendering as we speak, then I'll have to upload and wait on YouTube to publish.


EDIT : Now the video editor is frozen while rendering. lol It's def another one of those days.

[niz76]

Oh No!