I need some help with an over rev

[DAGE]

so I've been trying everything and I can't get rid of an awful over rev I have on the sled, everytime I go WOT from a stop it climbs to 10 500 and then dives down to 9700ish and then crawls back up to 10700-10900, the track is spinning but not that much because it's a 144" with studs (2 per bar) and I'm always testing on a groomed trail

here's my setup at the moment

YSY spring
HH with the heel loaded up mid has 3/8 bolt and tip has 7/16 with large washer
silver spring at 6-1 (70)
stock helix (does this with the shockwave aswell)

I also have a brand new OSO spring in my clutching box and a used silver spring that I can try, can someone point me in the right direction, this is getting frustrating because I never had a problem with my RX1 like I am with my Attak

Kyle

 

[the kitchen]

At 6-1 the silver spring is too soft and will pull through too quick dropping rpm's. First just change the silver spring to 6-3 and go for a run.
Don't change too much all at once as you will not know which change fixed the problem for fine tuning.

 

[fourload]

Set the silver spring to 90 degrees or put the stock pink back in @80. The silver spring is pretty weak and it is upshifting real fast then it is slipping at the top end.

 

[DAGE]

sorry guys that was a typo, I have a white spring at 6-1 but I'll try it at 6-2 and see what happens

I was just thinking and if the silver spring is too soft then why did it work on my RX1? the RX1 was a 151" with the same weights OSO spring and I had the HEEL X roller on it and it was flawless! and I only had it wrapped at 3-3 (60)

 

[fourload]

I use the silver spring in my ulmer kit wrapped at 80 in my shortie and it works well!!! Anything less and the backshift suffers. Clutch tuning is a fine balancing act between the helix and weight mass placement. You can also take away some mass from the middle of the flyweight . That should straighten out your shift. I used these in my RX1 years ago and I think the middle was empty. Then you can add a little to the tip if you need to lower your RPM's some.

 

[AIRWOLF]

white spring at 3-3 60

 

[DAGE]

I already tried wraping the secondary to 3-3 with the white spring and it didn't help

if I take the weight out of the middle won't the RPM's raise when I first go WOT?

 

[AIRWOLF]

how is your belt ?

 

[DAGE]

the belt is brand new, maybe 150 miles on it

 

[Wozy]

Is it a Yamaha belt?

 

[DAGE]

the belt that's in it right now is an Ultimax 3 but I've also tried a Yamaha belt and the problem still exists