i'm used to this precise clutching methods with the sleds since a while and i finally gota kit for the quad,as i tough,it really work better,you just can't get a better weights for the money,instant drop it kit and tune!got a lot more traction out of my scram at all throttle opening.
engagement and full shift out rpm are no big deal whenever you want with
the thundershift,you can lauch the thing at 5000 rpm or rev it to the moon,just add or substract weights in the effectivness area of the cam arm weights to achieve wanted rpm's in that particular range.
i saw less vibrations on the quad too since i run the thundershift with a properly balanced clutch.i'll never run standard weights again.

 

Sounds interesting. Sounds like the Heelclicker and Heavy Hitter products. Where did you get them at? Thanks.

 

How much does the kit cost?

 

i have 1 kit for sale,about 200 miles put on them,it is the bushed kit
at 120$.they do make a heavy hitter for the quad but it cost some more,
HH(heavy hitters) is for higher hp engines so the bushed kit only will fit my trail mods motor.i run the heavy hitter in the sled and it is awsome,you normally end-up to 5-6 g more weights in the clutch than stock
with same even quicker response and shift out,no doubt, so in the long run it make some more speed as well....
,fully american product!

www.thunderproducts.com

 

the weight itself is 39.5 g without anything,then you have a list of all steel and aluminum rivets/screw washers/spacers weight specs,so on a 2 stroke 400 you will need to add up to 15 g of weights through the 3 effectiveness weight area (low end-midrange-top end).
i put severals miles on kit like that with sleds and never had a single problem and it actually work better than the heel,no grinding,no cutting or drilling,easy drop right-in product,clutch tuning has never been so
easy and accurate.