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RockShox Monarch Plus RC3 Air Mystery Bottom Out Feeling

PB Forum :: All Mountain, Enduro & Cross-Country
RockShox Monarch Plus RC3 Air Mystery Bottom Out Feeling

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flag euanmarshall
Posted: Sep 11, 2017 at 0:50 Quote
Hi,

I have a YT Capra AL 1 2015, and I'm having problems with my rear shock (RockShox Monarch Plus RC3 Air). When in the open position, 1/3 of the way through the travel, it feels as though I am bottoming out, although I'm clearly not. This doesn't happen when in pedal or lockout mode, and I am positive that there is no frame contact. Please help. What other shocks could you recommend for this bike, if I need a new one? Thanks.
flag Minikeum
Posted: Sep 11, 2017 at 1:49 Quote
I had a similar problem and a full service of the shock solved the problem
flag euanmarshall
Posted: Sep 11, 2017 at 11:06 Quote
Minikeum wrote:
I had a similar problem and a full service of the shock solved the problem

Thanks, I'll give that a go.
flag diggery
Posted: Sep 13, 2017 at 3:24 Quote
Here's my guess..

If it's a knock or bump type feeling 1/3 of the way in on fully open, it sounds like the IFP has lost pressure.

The IFP (internal floating piston) has air pressure behind it and acts like a spring, keeping the oil under pressure. When the shock compresses, the shock shaft needs room in the shock, so the IFP moves to allow for this.

With no air pressure behind the IFP you can get a knock like a clunk. Sometimes simply pumping the IFP back up to 250psi solves it. You need a shock pump adaptor. Instructions on SRAM site.

However, if there is no air, it's for a reason, so the IFP seal could be damaged. A seal kit / service will fix this. I do it DIY but you might need to send off - warranty of service.
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