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Post by pinkflames420 on Apr 7, 2017 0:42:17 GMT -5
well, I decided it's safe to start a thread here as I FINALLY got my scoot running and had my first ride. Not to say a real ride as I just rode around to my tiny neighborhood area which just includes dirt driveways. The way my scoots running at the moment, I am not really prepared to take it on the road as my driveway leads right onto a highway. Acceleration from a stop is slow, but top end seems fine after it picks up.
I think a quick CVT tune and I'll be okay to ride it on the road for further tuning...
Me and my husband were kind of excited to ride it and I forgot to take an in hand video, but I quickly got my hubby to shoot a few seconds to show takeoff. Mind you, I had to open the throttle wide up to get me moving as I was in the video.
FYI I'm pissed because all of a sudden my speedo doesn't wanna work so I'm kinda just hoping it will free up.
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Post by pinkflames420 on Apr 7, 2017 1:00:55 GMT -5
Going to try lighter rollers and see how that works 🙂 I'll make a real riding vid once I get it on the highway! Even if it's crap which it probably will be. Gonna try and get my hubbys iPhone/cellphone holder for the car too work somehow.
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Post by niz76 on Apr 7, 2017 1:04:18 GMT -5
Congrats on getting her running!
But oh my, that scoot should be nearly lifting the front tire up even with stock CVT setup... something doesn't seem right for sure??...
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Post by spaz12 on Apr 7, 2017 1:44:06 GMT -5
Woo hoo, you did it! That wasn't so bad, was it?
Almost sounds like the belt is slipping.
Did you change anything in the cvt at all? With just a bbk you can leave it as it was, or even add a bit heavier weights.
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Post by benji on Apr 7, 2017 1:53:04 GMT -5
What bbk did you use? I guess there are some kits out there where the arrow that points to the exhaust side on the piston is backwards.
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Post by pinkflames420 on Apr 7, 2017 2:38:13 GMT -5
Thanks guys! I'm just happy I got it running lol i had to ride it. It seems fine after a few seconds of slow acceleration at full throttle. I didn't get a full vid.
And no, I haven't changed a thing to the cvt. I figured lighter weight would help it pick up a bit quicker? Also my tach just dangles there so I wasn't really reading it and I guess speedo needles stuck so I can't give ya anything! LOL
Benji, I'm pretty sure I got that piston on correct! The locator pins were on the top of the piston forsure and if I can remember correctly the skirt opening was on the top aswell.
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Post by 90GTVert on Apr 7, 2017 5:36:15 GMT -5
Sounds like either a weak engine that is struggling to pull past the low RPM range or a CVT issue leaving you stuck at low revs too long. If I'm correct, you can hear it begin to rev as you let off near the end of the vid, and you also say it goes fine after this. Goes fine is a tough one, because a 70cc kit should feel strong if you're used to it as a 49cc. It should also pull harder with the stock CVT or if it's slow usually be because of over-revving a bit with a kit like you have and the stock CVT (race kits would be more likely to be dead at low revs from their aggressive setup). EDIT : You did get a tuned pipe on there I think. That could require clutch springs and lighter rollers.
I don't expect it's the issue here, but you never actually checked compression did you? That test eliminates a lot of engine health concerns quickly.
Could be something like the carb tune needing work so performance suffers. Quick tests like covering the airbox inlet partially with tape or removing the airbox may help you figure out if it's a carb tune issue.
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Post by tsimi on Apr 7, 2017 6:06:09 GMT -5
First, congratulations for getting the engine running.
I did not follow your build thread so I have no clue what parts you have installed, but is that an expansion chamber you have there? Is that stock?
How does it run when it is not under load? Put it on the center stand and rev it a bit. Take a video of it and show us.
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Post by pinkflames420 on Apr 7, 2017 13:23:16 GMT -5
Just clearing up the air, I DO NOT have an expansion chamber. Does it sound like it ? lol I haven't ordered one yet, I'm gonna really need to keep up on my house work and make some fancy ass dinners LMAO mt new hobby has forced hubby to have deeper pockets  Yes , you are correct Brent. As soon as it wanted to dart off, I let go of the throttle and came back. Maybe I'm thinking "fine" as a comparison to the sluggish acceleration lol. BUT , when I had everything stock my scoot would zing up my hilly driveway no problem. As soon as we came inside last night I realized ahh I didn't do the compression check even after I had it idling for 10minutes! I was honestly just too excited. Try and get some numbers this week. it's a little mucky outside today tho for the naked scoot. Tsimi, I didn't get a video but it seems to rev fine with no load! I can get some vids for you guys. Also update my profile... |
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Post by pinkflames420 on Apr 7, 2017 13:25:29 GMT -5
BTW, I KNEW THIS IS WHERE MY PATIENCE NEEDED TO BE SAVED. LOL CVT TUNE GAAAHAHHH
Edit: This might be way off, but when I cleaned out my crank case, I cleaned the vario plate/cover aswell. I realized the gas I cleaned it out with had fuel stabilizer in it which I think has an oily consistency? Would this cause something funny to happen with the belt?
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Post by 90GTVert on Apr 7, 2017 20:13:29 GMT -5
Edit: This might be way off, but when I cleaned out my crank case, I cleaned the vario plate/cover aswell. I realized the gas I cleaned it out with had fuel stabilizer in it which I think has an oily consistency? Would this cause something funny to happen with the belt? If it left an oily residue it could cause belt or clutch slip. In that case, I'd think you'd hear it rev real high and then it would have to catch to take off so revs would drop. Sounds like the opposite happens to me. |
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Post by AtariGuy on Apr 7, 2017 20:26:13 GMT -5
Yeah something's up with the install. It should rev like - right now - the moment you open that throttle. I get an adrenaline rush hittin mine wfo. I would say there's something wrong in the head. Did your leakdown test show any leaks? Did you do a soapy water test around all the gaskets, head and base, and reed cage/intake while it was under pressure? How are your reeds? What was your durations and squish? Sorry, i'm sure these numbers were on another thread but it might help to drag them over here too so we can review them.
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Post by AtariGuy on Apr 7, 2017 20:29:19 GMT -5
Edit: This might be way off, but when I cleaned out my crank case, I cleaned the vario plate/cover aswell. I realized the gas I cleaned it out with had fuel stabilizer in it which I think has an oily consistency? Would this cause something funny to happen with the belt? If it left an oily residue it could cause belt or clutch slip. In that case, I'd think you'd hear it rev real high and then it would have to catch to take off so revs would drop. Sounds like the opposite happens to me. might help to put some brake cleaner to your variator. Also check on those clutch springs, sounds like the clutch is fully engaged trying to take off. |
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Post by pinkflames420 on Apr 7, 2017 20:48:04 GMT -5
Thanks for confirming Brent.
Leakdown was good to go! Just forgot to grab the numbers on the compression check. By the way Atari, I haven't removed ANYTHING in the vario yet. Everything is stock. I have the 80MJ in but I'd like to do further tuning there.
And yes sorry,...
My squish is at 1.1mm , and durations : ex - 197 / trans - 127
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Post by drc174 on Apr 8, 2017 0:13:04 GMT -5
Wait...
197/127?
You should be pushing a powerband around 11000 or higher rpm, there is no way that thing will run close with stock exhaust, stock rollers.
The squish fine, but you could put in a smaller base gasket, about 0.2mm thinner, to drop the timings a bit and get to about 0.85/0.9mm, with aluminum, for the road, thats great.
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