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MRP Ribbon *COIL* master thread

69K views 302 replies 61 participants last post by  fr0sty  
#1 ·
The other thread "MRP Ribbon" can be a bit confusing since it's muddled up with discussion of air and coil and everybody has to preface their question with which fork they have.

Figured we could continue the discussion of the Coil forks here....
 
#2 ·
I'll start; 185 walking around, 195ish kitted up. I just swapped from the medium coil to the firm and it's much better. Much more precise, much less braking dive and I still use the same amount of travel.

If anybody weighing 180+ is having issues with vagueness, dive or what feels like harshness, I'd recommend at least trying a firm spring.....takes 30 min to swap out!
 
#13 ·
Hey Noah, quick question on tuning the Ribbon 29 coil. I have it set up at 150 mm and I'm 180 lbs, riding in North Vancouver. I had the medium coil on it at first. Amazing small bump and felt great all around. Just bottomed out a little too easily. I had the Ramp control maxed. I didn't play with the pre-load before swapping to the firm coil. Would adding pre-load help with the bottom out? Or just the initial position?

Mike
 
#14 ·
Would adding pre-load help with the bottom out? Or just the initial position?
Adding preload does change the force required to achieve any given amount of travel, but not the rate. So yes, it would increase the force required for bottom-out, but not by a lot. It's best used to fine tune ride height (sag) and initial feel.

I'm nearly your weight and could see being in a similar situation. If the firm spring feels like too much at 150mm, you could try it at 145mm. Or, conversely, go back to the medium and take the fork out to 155 or 160mm.
 
#17 ·
After a couple of rides since changing to soft spring - definitely did the trick. Much more responsive on small bumps and still great mid level and big hit response. Getting much better travel. Harshness gone. Using about half the rebound and some preload.

Makes sense, but it’s more challenging to get it right when you’re on the border of two springs.
 
#18 ·
Thought I would weigh in on the spring rate conversation. Until recently, I was running the medium spring. The fork felt good, but not great. The 140mm DVO air fork on my 29er felt better, especially on fast, rowdy trails. Obviously not ideal when the trail bike goes downhill better than the enduro bike...

The specific shortcomings I experience on the Ribbon coil with medium spring:
-excessive brake dive
-not using full travel (max of 130mm even when deliberately trying to load the fork on 4'+ drops, rocks, dips, etc)
-felt dead when I wanted to get the front end up
-harsh at high speeds

I tried a bunch of different damper settings, but nothing got the fork quite to where I wanted it. I was on the fence about whether to try the soft spring to see if I could use more travel or try the firm spring to dial out the brake dive and dead feeling.

I went with firm, and I am very, very happy with the results. No more brake dive. No more harshness at speed. No more dead feeling on jumps and trail features. The fork stays higher in its travel, but since I feel more confidence and ride faster, I end up using more travel! 145mm on normal trail rides, about 155mm on faster trails with drops, and 160mm when I purposely land nose heavy. Better fork = faster pace = more travel used.

My current settings
Fork: 27.5 coil at 165mm
Weight: 190lb in gear
Spring: firm
LSC: 2 cicks from closed
Ramp: 20 clicks from closed
Rebound: 10 clicks from closed
 
#41 ·
-not using full travel (max of 130mm even when deliberately trying to load the fork on 4'+ drops, rocks, dips, etc

I went with firm, and I am very, very happy with the results. No more brake dive. No more harshness at speed. No more dead feeling on jumps and trail features. The fork stays higher in its travel, but since I feel more confidence and ride faster, I end up using more travel! 145mm on normal trail rides, about 155mm on faster trails with drops, and 160mm when I purposely land nose heavy. Better fork = faster pace = more travel used.
each to their own settings. The only thing that doesn't make sense to me is how you use more travel with a higher spring rate? Perhaps the lower service you did when changing the spring was the reason for the better use of travel?
 
#19 ·
Does anyone know if a 29er will fit in the 27.5 at all? I don't need much clearance it will be used in a dry xc race.

Edit: nope no way went to lbs won't fit. Maybe a semi slick might.

Ok so more crazy ideas. Will a dvo diamond 29 lower work? Has same stanchion diameter at 35mm and has same axle to crown @572mm at 160mm travel.
Both are cartridge based with no high pressure sealing in the lowers.
Ok won't work different stanchion spacing. Nice guy here in the forums JonnyC7 checked for me.

That's fine because Mrp quote $170 for lowers with new seals and bushes.

So I'm hooked up.
 
#20 ·
Paging Noah, this one's for you.

Yes it's a f**k up, but it's not what you think. For the record, I've changed springs in these forks multiple times so I know the correct procedure, and I was *not* trying to do that incorrectly in this case.

Basically I've been finding that I need to pop the adjusters out of the lower legs periodically to burp air out of the lowers (i.e. I don't get the same result using the buttons on the back of the legs).

In this case I had unscrewed the spring side top cap part way to take some preload off the spring, so I could tap the ramp adjuster in and pop the o-ring seal to release built up air pressure.

Anyway, having done this I then compressed the fork to snug everything back up so I could screw the adjuster back in, and turns out the top cap was unscrewed more than part way, as it popped out and the spring fired out of the top of the leg to where you see it. Had these forks 18 months and needless to say never had this happen before.

Now it's 100% completely and utterly jammed in that position, which is somewhat inconvenient.

Ideas please? Preferably not ones involving new CSU and spring...



Thanks!
 
#23 ·
Now it's 100% completely and utterly jammed in that position, which is somewhat inconvenient.

Ideas please? Preferably not ones involving new CSU and spring...

Thanks!
I don't think there's a magic bullet here - it's jammed, you've gotta get it out one way or another. I would think completely pulling it out might be the preference at this point vs. pushing it in. Pushing it back in would probably slightly increase the OD vs pulling it decreasing the spring diameter. That's my thought.

BUT, you may want to call tech support on this, Eric may have other ideas. 970-241-3518

Surprised you're getting a different effect by removing the foot bolts vs. depressing the PSST valves and cycling the fork. In the future you may try sliding a zip tie between the wiper and stanchion as an alternative.

Good luck!
 
#27 ·
#43 ·
Damper loose

Hi!
Was doing a service on my Ribbon and did bleed the damper.
Did some small bleed mistakes so I wanted to do it again.

Then I noticed the damper didnt seem to sit properly and I could se that it had unthreaded(?) at the top. Please see the attached image.



Is that something I could fix my self? Or do I need the MRP damper install tool?

Worth mentioning is that I have not noticed any of this while riding. It seems a bit odd it came loose in the workstand.

Thanks!