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Discussion Starter · #1 ·
I'm trying to dial in my new D&D ZRT 1000. I've finally got the carb setup pretty close and now I need to get the clutching where I want it. Here's what I currently have

polaris 10-64 weights.
D&D Teal drive spring 185-295
D&D Purple driven 83-140 middle hole
D&D 60/40 helix

With the above setup I am only revving to 8000 RPM. I need to gain about 500 more RPM. Should I go down in weights to gain that extra 500 RPM? I am 6'4' 320 lbs. Most of my riding is aggressive trail riding.

I've also got the following parts.

polaris 10-60 weights
Goodwin Purple drive spring 121-240
Goodwin Silver driven spring 70-125
Goodwin 60/50 helix

Are those 60 gram weights to light?

thanks,

Kevin
 

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Don't forget to try another spring hole in your secondary! Each hole is roughly 150-200 +/- difference in rpm, depending on spring, helix, primary setup, etc.
 

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<div class='quotetop'>QUOTE (Tuner @ Jan 21 2007, 11:25 AM) <{POST_SNAPBACK}></div>
You should do most of your clutch tuning in the primary then fine tune with the secondary. Heavier weights = lower rpm,s. Lighter weights = more rpm,s.[/b]
thumbguy :yo_sup:

BM...
 

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Might want to try heavier primary spring orange springs with 64 weights. Orange D & D spring is 170/305. Your teal is only 170/280 according to the catolog with the Orange f7 on the front. Anyways you need a heavier spring.
 

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Discussion Starter · #8 ·
<div class='quotetop'>QUOTE (CATDOG1970 @ Jan 21 2007, 12:48 PM) <{POST_SNAPBACK}></div>
I have a set of 1062 polaris wts. $42 shipped if you want them. let me know [email protected]...p.s. 62's should put you right where you want to be[/b]
Thanks for the offer but I am going to see if I can get something local. I'm in Canada so shipping time is probably at least 2-3 weeks.

<div class='quotetop'>QUOTE (edsled @ Jan 21 2007, 03:28 PM) <{POST_SNAPBACK}></div>
try the 60g weights, they should get your rpms up. but if you want to keep the 64's try goodwin's black primary spring (180/330)[/b]
Thanks,
I might also see about picking up the 10-62 weights. Not sure if the 60 g weights might cause me to rev more than 8500.
 

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If the profiles of the weights are the same to go from 8k to 8.5k you would need to go from 64g down to 56.7g
62g will get you 8128.
60g will get you 8262.
If the profiles are different all bets are off. Try your 60g's first.
Don't forget that lighter weights will also increase your engagement RPM. If you were 4K with 64 you will be about 4250 with 60's. This is usually why we change the primary spring to one with a slightly higher full shift load and an identical pretension load as suggested by tcat446
 
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