Stuck at 6k By bugnick4811 (Read 773 times)

[bugnick4811]

Qmb 139, installed full bbk "80cc" exhaust, carb, filter, piston, cylinder, valvles, all dome 100% to spec. Infant it's the second kit I tried due to me being at a loss here. The bike runs absolutely great, but I'm stuck hitting 6k rpms. Before I put the new variator on it would hot would hit 8k rpms. Which I'd like to be back in that range. I've tried from 5g to 9g rollers. Started high with the kit and worked my way down. And I just can't get over 6k.... I have 2 brand new cdi of different brands. Neither make a difference. Now if I put the bike on the stand with no load it'll hit hit 12k I believe. I let off 3/4 throttle at 10 rpms. I weigh 165. I've also tried a range of torque and clutch springs. Nothing has made a difference except my acceleration has bounced from crazy fast to crapty... I'm hitting 53 gps verified which I'm more than happy with, but why on earth can I not hit just a bit higher rpms?
Also, on to my second variator trying to figure this out aswell, I keep getting huge detrimental flat spots on my rollers.

What gives!?!??!?!

[cyborg]

Large variator face? ,,,@ 53 gps verified at 6000 or so I'd be happy,,,it'll stay together longer

[bugnick4811]

May 25, 2016 21:50:36 GMT -6 cyborg said:

Large variator face? ,,,@ 53 gps verified at 6000 or so I'd be happy,,,it'll stay together longer

I can't compare to stock as the face had worn grooves so I tossed it. It's a cheapo koso variator if that helps. And I'm extremely happy with performance as I know it's pretty much at max potential. But I'd just like to see the rpms regained...
Clutch and torque springs haven't helped, different weight sliders haven't either. It seems to stick at 6k rpms, even on the stand with no load it's snags at 6k rpms then hammers up to 12k... according to stock tach which I'm sure isn't quite right....fyi all emission stuff is gone evap and egr..

[cyborg]

Something is hanging up in the variator,,, my opinion of course,,,either the weights are nit acting smoothly or one of the halves is binding on the shaft,,,

[cyborg]

Oh and yes forget the stock tach,,, those things are as screwy as my second ex wife,,,, and that my friend. Is really off

[bugnick4811]

Lol, that's what I was thinking also, but everything is moving smooth as can be, not to mention I'm on my 2nd variator just to make sure...

[cyborg]

Carb slide binding?

[bugnick4811]

I fail to believe that's happening. I have 3 carbs does it with any of them.

[bugnick4811]

youtu.be/dq4C1UvX5Bg

Here's the video of what's goin on...

[cyborg]

Link doesn't work,,,,for me anyways

[jct842]

Me I wouldn't worry, 55mph with what looks like a 50cc and no plate is plenty good enough to get a couple tickets and cost a pile of money!

[bugnick4811]

m.youtube.com/watch?v=dq4C1UvX5Bg

Try that.

I'm not worried so much of performance I want my rpms higher lmao. I just need that to happen! Ordering a new clutch assembly this week. Hoping it's the pin in the original assembly sticking or something...

[cyborg]

Give us an update when you get it in,,I wanna know at least

[bugnick4811]

Interested thing happened today. I started to get a loud tick from the top end, and decided to do some checking. First off broken valve spring :/ also decided to check the CVT with the cover off... I'm stopping at 6k Roms because my belt is going going up and over my varistor at 6k!!!!!! To much powaaaaaaaa haha time for a larger variator, might end up making one....

So thought on where to purchase a larger variator??

[cyborg]

Give dmartin a call or pm him ,,, he'll get you sorted out with springs and a variator