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Base clutch tune


Timshee

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I know some with a 18DM setting records in 300' running all 6 stock springs. It's all about your secondary weight and air gap. Etc. It's takes a lot to figure out what works with your set up. So go test and tune like the rest of us.

 

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I just threw whatever springs and weights i had laying around the shop on my 16 Mil.

 

 

I agree get some baseline passes, and get the gearing figured out first. I like to gear a motor like that to about 87 - 89 mph at the traps at peak hp rpm, or in the overrev a tad.

 

 

With those tires, you may have to gear it lower though. I have some tires like that that I never could get to work.

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That's pretty bitchin^

 

try same setup&track with more weight. Then less weight. Then go back to the original weight and make a spring change. Make runs with more weight, as well as runs with less weight. See how the bike reacts to each little change individually. If you can make passes on all those changes in one day, it really helps to get a grasp on what does what. Then start playing with tires and gearing. Some times you just know if it's geared way wrong or tired way wrong and those might be worth changing first.

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Get a note book. And write down what ever changes you make. Its the same for asphalt that we do. Sometimes you make a change thinking your smart and it hurts your e.t. That's why baseline is very important. You really need to get a valve spring tester and test your springs. Just throwing in springs is the old school way. It's work. But you have no real idea were to make improvements. Baseline, base prussure and arm weight in that order. What 60'foot are you running?

 

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