Possible heavier coils for rear spring sag fix...(need info!)

25542 Views 31 Replies 10 Participants Last post by Kyle, Apr 9, 2015

Mass-n-trash

Discussion Starter · Feb 10, 2015 (Edited)

I just got off the phone with Ryan at Eibach springs http://eibach.com/america/en/powersport/products/atv
and told him about our rear spring sag problem. He seemed to think this might be an easy fix and he might even have something already on the shelf... but needs some info.
Can anyone give me the...
#1. extended spring length (just the coil itself seperated from the shock)
#2. Inside diameter
#3. Spring rate
He says they have over 300,000 springs in inventory covering all applications...Snomobile/ATV/UTV/Cars/Trucks. If I can get him these measurements, he can look to see if they have something that might work? NOTE: For the spring length, it might be better if I could get this from someone that has a a newer machine (or one with less miles) so the springs have'nt sagged a bunch already. For those of you with newer machines, you might not thing you have an issue with the rear sagging but YOU WILL. This is worth the time to check!

He also mentioned the possibilty of a group buy if we find something that works!

1 - 20 of 32 Posts

Dupupp

· #2 · Feb 11, 2015

I have had eibach springs on one one of my cars back in the day! Great product!

bluerebel

· #3 · Feb 11, 2015

If no one steps up to the plate. I'd be willing to remove mine and measure it for ya

Reactions: 1

Mass-n-trash

Discussion Starter · #4 · Feb 11, 2015

Thanks bluerebel...I was sent this (I think it's what I need) and I'm going to call them in the morning

Rear suspension
Type Double wishbone
Spring/shock absorber type Coil spring/gas-oil damper
Wheel travel 205 mm (8.1 in)
Rear shock absorber assembly travel 112.0 mm (4.41 in)
Spring free length 381.2 mm (15.01 in)
Installed length 316.2 mm (12.45 in)
Spring rate K1 36.00 N/mm (3.67 kgf/mm, 205.56 lbf/in)
Spring rate K2 115.00 N/mm (11.73 kgf/mm, 656.65 lbf/in)
Spring stroke K1 0.0–75.0 mm (0.00–2.95 in)
Spring stroke K2 75.0–112.0 mm (2.95–4.41 in)

See less See more

Robleticia

· #5 · Feb 11, 2015

I hope they have a complete shock and not just the spring. I sure would like some adjustability and performance! But if they help the sag then at least it is a start! Thanks mass-n-trash for looking into this!

drewholder

· #6 · Feb 11, 2015 (Edited)

How much of a sag are you guys experiencing and at what age or mileage of you bike?

Mass-n-trash

Discussion Starter · #7 · Feb 11, 2015

Some are sagging more than others. Several are in the same boat I am in...we have added larger tires and even lifts only to find that we are not that much over stock spec. I had added 27" tires..but that only got me back to 11 1/2". You should measure the clearance from the ground to the bottom of your hitch reciever and, as per the Yamaha spec sheet, you should have 11.8" of clearance. FYI: I had less than 50 miles before I noticed an issue.
How much clearance do you have?

drewholder

· #8 · Feb 11, 2015

Low 40s but I'll hit 50 tomorrow, I will measure and get back to you guys. I already have a 3 inch lift and am putting on 30s tonight so I'll send before and after measurments and pictures.

Mass-n-trash

Discussion Starter · #9 · Feb 11, 2015 (Edited)

So with a 3" lift, you should have 14.8" of clearance now. (How many miles do you have on it?)
FYI:I just went through my notes and I had 10 1/2" with 30 miles on it and 1/3 tank of fuel. Then, I added the 27" tires not too much later and I got 11 1/2".

drewholder

· #10 · Feb 11, 2015

low 40s
Thats BS man! Yamaha should do something about this, I'll have to lower my front to 2 just to stay level, spend money on spring spacers, new springs or new shocks.

Mass-n-trash

Discussion Starter · #11 · Feb 11, 2015

On another note....do any of you Viking 6 Owners have the service manual? If so...could you please post these same spring specs (see post #4) for your machine? It would be interesting to compare the two. I know the two shocks, V3 vs V6, have different part numbers and I would be curious to see if the V6 shocks are just heavier duty and interchangeable. Might be an easy fix if we could just upgrade to the V6 rear shocks.

Reactions: 1

drewholder

· #12 · Feb 11, 2015

Great idea, Mass!

Mass-n-trash

Discussion Starter · #13 · Feb 11, 2015 (Edited)

UPDATE!!!!
I just spoke with Ryan at Eibach and the info out of the service manual was correct. All I need now is for someone to come up with the inside spring diameter at the top and bottom cups. He is thinking that we could try a plus 50lb spring and start there. They do not have variable rate springs but when he was looking at the specs he indicated that it looked like the top part of the OEM springs were not much more than a spacer if you add any kind of a load. I know the top part of my coils are almost touching already. He did say that no matter what...a heavier spring will equal a stiffer ride.

SO....can anyone out there get me the inside diameter of the coils (top and bottom) at the cups?

Mass-n-trash

Discussion Starter · #14 · Feb 11, 2015

GOT IT...Inside diameter is 2 1/16". I have given Ryan at Eibach all of the dimensions and he said he'd get back to me.

Still looking for the springs specs from one of you that has a Viking 6. It should be in your service manual (same as post #4)

Mass-n-trash

Discussion Starter · #15 · Feb 11, 2015

Viking 3 and Viking 6 spring specs....notice the length and travel are the same.

Rear suspension
Type Double wishbone
Spring/shock absorber type Coil spring/gas-oil damper
V6 (same)
Wheel travel 205 mm (8.1 in)
V6 (same)
Rear shock absorber assembly travel 112.0 mm (4.41 in)
V6 (same)
Spring free length 381.2 mm (15.01 in)
V6 (same)
Installed length 316.2 mm (12.45 in)
V6 (same)

Spring rate K1 36.00 N/mm (3.67 kgf/mm, 205.56 lbf/in)
Viking 6 - K1 60.00 N/mm (6.12kgf/mm, 342.6 lbf/in)

Spring rate K2 115.00 N/mm (11.73 kgf/mm, 656.65 lbf/in)
Viking 6 - K2 100.00 N/mm (10.2 kgf/mm, 571 lbf/in)

Spring stroke K1 0.0–75.0 mm (0.00–2.95 in)
Viking 6 - K1 0.0--66mm (0.00-- 2.60in)

Spring stroke K2 75.0–112.0 mm (2.95–4.41 in)
Viking 6 - K2 66.0—112.0 mm (2.6—4.41 in)

See less See more

Robleticia

· #16 · Feb 12, 2015

You are the man mnt!!!!!!!!!!

Mass-n-trash

Discussion Starter · #17 · Feb 12, 2015

Unfortunately the news from Eibach is not good. The smaller ID of the V3 springs is a bit unusual and they have nothing that might work. If the ID were 2 1/2" he might be able to come up with something. On another note, I checked with my dealer and the V6 shocks are backordered until further notice. So, for now, the inexpensive spring spacers from E-bay are our best bet.

bluerebel

· #18 · Feb 12, 2015

Mass-n-trash said:
Unfortunately the news from Eibach is not good. The smaller ID of the V3 springs is a bit unusual and they have nothing that might work. If the ID were 2 1/2" he might be able to come up with something. On another note, I checked with my dealer and the V6 shocks are backordered until further notice. So, for now, the inexpensive spring spacers from E-bay are our best bet.

I love my spacers, lol.

Quite easy to do and they definelty help. I'm sitting slightly above 12-1/16" with my spacers in. The body is raised like 1-7/8".

Cheap and effective.

tgmoore71

· #19 · Feb 16, 2015

What my original springs looked like

See less See more

2

tgmoore71

· #20 · Feb 16, 2015

What bike looks like with Viking VI springs

See less See more

3

1 - 20 of 32 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.