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Tech Tips from Racers for Racers
|Introduction and Background Information for Bi-Zeta Clutches.|
Dear Pocket Bikers,
This article is the first of a series of articles that will be posted on Minimoto Garage for the Minimoto community. The articles will cover tech tips, how-to, speed tips, and other great information on the proper use of Bi-Zeta High Performance Parts and Accessories for Polini-powered pocket bikes. These articles will be posted on his behalf.
First of all, please forget everything that you know about clutches, and open your minds; there has been plenty of information posted about clutches, some correct, and some incorrect. Many of you have questioned about proper clutch setup, what do the different weights mean? And what are the different color springs? This article will cover these various aspects of Bi-Zeta clutches.
Second, letís review the different clutches available, Bi-Zeta makes 3 different clutches, each of which have their own purpose.
1. 60-gram Ergal (Blue); this clutch is made of aircraft-grade Ergal aluminum and is very lightweight. 60 grams is the weight of the backing plate, not the entire mechanism. Since it is lightweight, it is designed for Junior class A (6-10 years old, under 80lbs) racers. This enables the Polini 4.2 engine to spool up the motor more quickly. Since we are dealing with youngsters, it can handle the stresses of racing, however, this is strictly a Junior clutch and should not be used by others over 80lbs. This clutch will break with bigger riders.
2. 130-gram steel; 130 gram weight backing plate. This clutch is intended for intermediate and senior riders. This one is generally used on small, and medium size tracks (NOT BEAVERUN). Senior riders should use the red springs that come standard with the clutch. The red springs are the heavy duty racing springs.
3. 250-gram steel; 250 gram weight backing plate. This clutch is intended for senior riders. This one is recommended on tracks with longer straight-aways. This clutch takes longer to spool up, but retains mass speed once it gets going. This one is for BEAVERUN. Red springs required with this clutch.
I have described the 3 different clutches, now what do the colored springs mean? Simply, Yellow is for Juniors only, Blue for large Juniors and casual riding, and Red is for Seniors and racing. That is it, very simple.
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