Launch Rate: Acceleration from 0 to 5 MPH

[Wheelman-111]

Greetings:

So OK, 8:1 gears with a Polini 65 and stock carb is a tall order, but my 0-5MPH just sucks. Clearly the clutch is engaging too soon. No tach but just off-idle despite slightly stronger +1000 springs installed last week.

I don't expect to wheelie or smoke my little 10-inch Dunlop, but some indication of an intention to move would be nice. I'm doing the Fred Flintstone Shuffle sometimes just to get to 5, where it takes off nicely.

Is the Stock clutch - with +3000 springs at least - up to the task? Options from the aftermarket include a $30. (+ $20 Shipping!!) Chinese clutch off eBay. Can't afford much more than that right now.

Suggestions welcome.

[burnt_toast]

howabout trying stiffer center spring? may help some too

Or rather first, I would just try some lighter rollers. That can sometimes mask clutch issues, try 0.5-1g lighter see what happens

[scooterwerx]

i think i have some clutch springs you can have, i dont know what they are rated, i know they are stiffer than stock

[Wheelman-111]

Greetings:

The launch issue is separate from the top speed, at least to some degree. (See below) I have Chinese White springs that are +1000-1500. I don't think they raised the engagement speed even that much. If yours are stiffer than that, I'd be interested, along with the Malossi Center Spring and of course, the long-awaited AF05 Intake Adapter.

I think it was Kenny who pointed out that if the clutch engagement speed is high enough, the variator has already "shifted up" by the time the clutch bites. Tricky stuff to sort out, particularly with an overgeared tranny. I'd still like to hear impressions of the Keli vs. OKO results others have seen.

With admittedly limited testing using the OKO and a 6.5g combo (7s and 6s = 39 g.), over-rev occurs before top speed potential is achieved. Launch isn't much better than it was with Keli+8gs, but some better.

The 8g (48 total) actually shifted too SOON, bogging at 42. There are not many combinations available between 6.5 and 7.5, I don't have six of the 7g weights! I may try two each of 6,7, and 8!!

The weather's supposed to clear this evening and I will test what I have again before yet another sidecover pull.[/i]