4 white springs on a purple plate
I see 2800 with no weights per shoe, 2600 with one weight per shoe and 2450 with two weights per shoe. And the Hillard add description of their clutch it says weights are not included with the clutch and that it's not lock up speed, it's when the shoes first touch the drum. It's very confusing to me what the clutch will do per what weights you buy and I can see why it's confusing to Phineas.
If I assume he bought a new clutch and it did not come with weights, he's likely asking how many weight should he put in each shoe. I think if he has a new clutch out of the box, it's going to engage too high and probably burn up with a new purple plate driver.
My guess after looking at the Hillard site is if you bought a new clutch or if you don't know, to start out put weights in both shoes. That way the clutch will engage as soon as possible, probably lugging the engine down and you have a starting point. Next try removing a weight from each shoe and see what happens.
And never have used a clutch like that it is ALL A GUESS.
All this post is my reading of the pdf on engagement speed from the Hillard site at:
http://www.bmikarts.com/Inferno-Flame-34-Bore-Racing-Clutch-from-Hilliard-_p_809.html
I'm going to go out on a limb and say/repeat, with a rookie driver being new. Start off as Kj26 said with the white springs and as I'm suggesting 2 weights in each shoe. Then if the engine lugs too much and you think your young driver is ready for it, take one weight out of each shoe and see how they do driving. Next step is take the second weight out of each shoe. If they do ok then your next step is to install the black springs with 2 weights and continue on with the process of getting better and faster.
If your driver gets the the point where no matter what you do they just don't get any faster, then you forget about the clutch and figure you need to get better at kart setup or tire setup. Always figure your young driver is going to be able to learn faster driving then you are able to learn to give them something good to drive. ...
>>>>> I MUST add I have no clue never having ever used a clutch like that. PLEASE this is the beginner section, if i'm giving out bad advice to a new karter PLEASE someone straighten my wrong advice out.
... and Kj26, I'm not saying your wrong. It's that I went to the site and learned the white springs have 3 different settings. Maybe Hilliard would help out here and give some advice to a new kart racer???????
How about throwing some customer support at us, your clutch looks really cool and able to do the job. ??? ...