Author Topic: 10wt fork oil with Sonic 1.1 springs  (Read 6521 times)

Offline hlh1

  • Full Member
  • ***
  • Posts: 191
  • Country: 00
10wt fork oil with Sonic 1.1 springs
« on: January 02, 2012, 11:41:44 am »
There used to be something on this board about this but so much is missing since the crash.  I just installed a ZZR rear shock and now the front feel a bit harsh with the 1.1 springs and 15 wt oil.  Would going to 10 wt oil help this? 
My bikes:  06 WeeStrom, 09 C14 ABS, 83 GS1100ED,

Offline George R. Young

  • Moderator
  • Full Member
  • *****
  • Posts: 582
  • Country: ca
    • Concours 2001 Farkles
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #1 on: January 02, 2012, 12:42:38 pm »
Front end bump harshness is a combination of taut springs and velocity-squared compression damping (thanks to el cheapo damper rod fork design).

Using thinner oil will reduce the harshness on compression, and unfortunately also the rebound damping.

I think the best answer is cartridge emulators, but they're not cheap.
65 CB160 (67-69), 69 350GTR (69-72), 72 R5, 73 RD350 (73-84), 82 XZ550 Vision (84-03), 01 Concours C10 (03-19), 89 EX250 (11-14), 00 SV650S (14-16), 03 SV650S (19-)

Offline westkyguy

  • Jr. Member
  • **
  • Posts: 68
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #2 on: January 02, 2012, 01:10:18 pm »
 What oil level you running? Drop it a bit to soften it up as the air space is a spring too. Try 170 mm of Dexron III .

Offline hlh1

  • Full Member
  • ***
  • Posts: 191
  • Country: 00
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #3 on: January 02, 2012, 01:23:18 pm »
I'm running the stock level, per the manual.  What viscosity is "dexron III"? 
My bikes:  06 WeeStrom, 09 C14 ABS, 83 GS1100ED,

Offline Daytona_Mike

  • Full Member
  • ***
  • Posts: 778
  • Country: us
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #4 on: January 02, 2012, 05:26:16 pm »
I'm running the stock level, per the manual.  What viscosity is "dexron III"?
That is GM's old auto transmission fluid back a few decades ago . They moved on to Dexron5 or 6 I believe. It is nice and thin but it is very hygroscopic like brake fluid. I am not sure  about its use in  emulsion tube type shocks. I guess it should be fine since it is not exposed to the moisture in the air.
I think your better off investing in  cartridge emulators. They really work well. I am running 1.2 Sonics and  emulators and I think I may go up to 25 wt. from 15wt.  I softened the emulators and it soaks up the bumps pretty good  but I want to lessen my rebound a little.
If you still have fuel in the tank, you are not lost yet
Most motorcycle problems are caused by the nut that connects the handlebars to the saddle

Offline hlh1

  • Full Member
  • ***
  • Posts: 191
  • Country: 00
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #5 on: January 02, 2012, 05:51:25 pm »
How easy is it to adjust the emulators once they're installed? 
My bikes:  06 WeeStrom, 09 C14 ABS, 83 GS1100ED,

Offline George R. Young

  • Moderator
  • Full Member
  • *****
  • Posts: 582
  • Country: ca
    • Concours 2001 Farkles
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #6 on: January 02, 2012, 06:57:08 pm »
You can fish them out with a coat hanger, once the fork caps are off.
65 CB160 (67-69), 69 350GTR (69-72), 72 R5, 73 RD350 (73-84), 82 XZ550 Vision (84-03), 01 Concours C10 (03-19), 89 EX250 (11-14), 00 SV650S (14-16), 03 SV650S (19-)

Offline hlh1

  • Full Member
  • ***
  • Posts: 191
  • Country: 00
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #7 on: January 02, 2012, 07:18:59 pm »
I have a set of emulators collecting dust because I've not had the "guts" to drill holes in my damper rods and then go through the adjustment process. 
My bikes:  06 WeeStrom, 09 C14 ABS, 83 GS1100ED,

Offline George R. Young

  • Moderator
  • Full Member
  • *****
  • Posts: 582
  • Country: ca
    • Concours 2001 Farkles
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #8 on: January 02, 2012, 07:41:38 pm »
Maybe this will help:

http://web.ncf.ca/ag136/forkUpgrade.htm

Based on recommendation from SISF, I changed from yellow to softer blue blow-off spring. He also recommends drilling extra holes in the plate.
65 CB160 (67-69), 69 350GTR (69-72), 72 R5, 73 RD350 (73-84), 82 XZ550 Vision (84-03), 01 Concours C10 (03-19), 89 EX250 (11-14), 00 SV650S (14-16), 03 SV650S (19-)

Offline hlh1

  • Full Member
  • ***
  • Posts: 191
  • Country: 00
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #9 on: January 03, 2012, 06:18:20 am »
It's Winter.  Maybe I should take a crack at this. 
My bikes:  06 WeeStrom, 09 C14 ABS, 83 GS1100ED,

Offline T Cro ®

  • Administrator
  • Sr. Member
  • *****
  • Posts: 1734
  • Country: us
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #10 on: January 03, 2012, 07:04:35 am »
It's Winter.  Maybe I should take a crack at this.

It is really no where near as hard as it sounds; plus you can come here to ask questions from those of us who have installed emulators before. Drilling out of the damping rod holes is not hard but does make some people squeamish as the idea of purposely ruining perfectly good parts sounds so "one way road" final.
Tony P. Crochet
(SOLD) 01 Concours Winner of COG Most Modified in 2010
Ask me about a set of Stick Coils & Harness or Precision Shift Linkage for your C10 Concours

Offline hlh1

  • Full Member
  • ***
  • Posts: 191
  • Country: 00
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #11 on: January 03, 2012, 08:07:18 am »
It also gives me pause that I may have to pull the emulators, after installation, for tuning... 
My bikes:  06 WeeStrom, 09 C14 ABS, 83 GS1100ED,

Offline sas mayhem

  • Full Member
  • ***
  • Posts: 365
  • Country: us
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #12 on: January 03, 2012, 08:19:33 am »
It is really no where near as hard as it sounds; plus you can come here to ask questions from those of us who have installed emulators before.
+1
It really is not hard at all. I did mine in my garage with all hand tools. The drilling parts is a straight drill thru, just make sure you deburr the holes. But when you done your handling will be like night and day.  It will really tie in your ZZR. Once you get everything apart you will see how basic it is... ;)

Cheers
Ron
09 Connie
...try to live a day without doing one of the 5 D’s....Deny, Defer, Deflect, Discount and Deceit...tougher than it sounds....

Offline T Cro ®

  • Administrator
  • Sr. Member
  • *****
  • Posts: 1734
  • Country: us
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #13 on: January 03, 2012, 08:29:12 am »
It also gives me pause that I may have to pull the emulators, after installation, for tuning...

Remove Fork Cap, Pull Fork Spring, Fish out Emulator with long reach magnet. A little messy yes but that's about all there is to it. Depending on how much research you do before and you may not need to pull them out at all; I was happy with mine as installed. If not it should only take a couple of tries.
Tony P. Crochet
(SOLD) 01 Concours Winner of COG Most Modified in 2010
Ask me about a set of Stick Coils & Harness or Precision Shift Linkage for your C10 Concours

Offline hlh1

  • Full Member
  • ***
  • Posts: 191
  • Country: 00
Re: 10wt fork oil with Sonic 1.1 springs
« Reply #14 on: January 03, 2012, 10:35:28 am »
I've just finished reading the Race Tech installation instructions for their emulators.  Please correct me if I'm wrong, but it looks like the emulators will increase the spring preload by the amount of their thickness.  Is this a problem?  I don't think I want any more spring preload than I already have with the Race Tech 1.1 springs. 
My bikes:  06 WeeStrom, 09 C14 ABS, 83 GS1100ED,