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 Post subject: Red torque/contra spring
PostPosted: Fri Jun 05, 2020 6:14 pm 
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I ordered the red contra and clutch springs, 10g rollers, and variator shims. I'm using the yellow springs now with 12g sliders with a 118mm variator. I'm having second thoughts about using the red springs. A lot of the driving we do is next to the surf in the hard sand. The speed limit is 15 mph and I'm afraid the clutch may not be fully engaged as such a sustained low speed with the red springs. Using the red contra spring may limit my top end on the roads which is 35mph.

I'm trying to get more bottom end to get through sugar sand and to climb the dune roads to get to and from the beach.

I've done some looking around and have seen some negative comments about going with the red spring setup, but no reasons.

Has anyone had any experience with the red spring setup they would like to share?

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Crossfire 150R
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35 MPH GPS Speedo
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1932 AHOOGA Horn
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 Post subject: Re: Red torque/contra spring
PostPosted: Fri Jun 05, 2020 6:55 pm 
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The red contra spring will quicken downshifts within the CVT. If you were to go with overly light variator weights, the red spring may over power them but the 12g slider or 10g roller are fine.

I prefer the stock clutch arm springs over stiffer ones. Under heavy load in sand or on inclines, stiff springs will the clutch slip instead of engage when the engine is working harder.

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 Post subject: Re: Red torque/contra spring
PostPosted: Fri Jun 05, 2020 9:46 pm 
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My thought process is with heaver clutch (arm) springs the RPMs will be higher and closer to where this little motor makes more power before the clutch engages. By keeping the RPMs higher before movement I will have more power in the soft sand. Problem is with slippage at low MPH burning up the clutch. Thoughts?

_________________
Crossfire 150R
12g Sliders, Yellow Spring, Clutch, Kevlar Belt
35 MPH GPS Speedo
Tach
28mm Pump Carb
Redneck Intake and UNI Filter
HP CDI, Coil and Plug Wire, Iridium Plug
1932 AHOOGA Horn
A12 Cam
P&P Head
58.5mm Piston/Cylinder Big Bore Kit


Top
 Profile Personal album  
 
 Post subject: Re: Red torque/contra spring
PostPosted: Sat Jun 06, 2020 12:21 am 
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Joined: Wed Nov 28, 2007 2:21 am
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Location: Pacific NW
You will burn up the clutch.

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09 Joyner SandViper 250
57 VW Transport 1200 (Buggified)


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