670x clutching

[newfiedoo]

hey guys seems to be alot of knowledge of the ole 670'a here i got a 99x with a 151 x 15" extros. and got the skid moved back 3" and down 1 1/2"... just wanting to get a clutch kit for it...clutches are all stock right now .... don't have alot of knowledge of clutching... any thoughts or ideas of what seems to work for this set up would be great....ride mostly between 3000 and 7000'

 

[banditpowdercoat]

Here's a setup Winter brew PM'd me. I havnmt fully tried the combo, still aquiring parts, but I'm close, and last time out, she was hooking pretty good, best Ive had her yet

A settup for the 670's for the mounatins that worked real good was 294 ramps, 200/320 primary, about 18-19g of weight for 3-7000ft, a straight 44 Doo helix w/polished ramps and standard Doo buttons and 14-16lbs of preload with Goodwin Blue secondary spring. Embarassed ALOT of 800's with this on a '98 SummitX, also worked well for several other 670's I set up. Paul-

For the record, heres what I ran on SUnday. 670, .060" squish, Jaws twin pipes, 151"x2" track with extros. Race Logic porting.
Clutching was/is
Pink/white spring 230/380
Solid pins with 1/8" hole 14.7g
whole arm weights 64.8 g
roller 9.7g
Arm 39.2g
226 ramps

Scondary
Beige spring
46 helix
17.5Lb cracking a-6


A little less pinweight I think will be almost spot on for 8200RPM

 

[B-Radical]

email Big John http://sledheadracing.net

He can do your clutches up for you or give you exact setups for your elevation.


B-

 

[newfiedoo]

thank's guys just got off the phone with big john got me set up ...parts on the way

 

[banditpowdercoat]

What's he sending ya??? Did he say? Just curious what he's got in mind for a setup

 

[newfiedoo]

What's he sending ya??? Did he say? Just curious what he's got in mind for a setup

not sure exactly...putting together a set up for my elevation ....sled set up ...track etc... very knowledgeable guy seems to really know his stuff from what i hear...i will let u know how it works