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 Post subject: MRP chainguide HALP!
PostPosted: Wed Apr 03, 2013 4:35 am 
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bikini loving kitty!
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Figured I'd post here before calling MRP and get some more content in the other areas of this site. I have a new MRP G3 Mini BB mount chainguide, an MRP Camber single-ring crank, Renthal 104bcd 32t ring, 73mm BB.
The issue I am having is rubbing on the inboard side of the chainguide. The directions call for generally having to add a 1mm spacer to the outboard side of the guide, the BB mounted guide acts the normal spacer you'd use in a 73mm BB application. They then go on to say basically do what you must to get the chain to sit in the middle of the guide path. Sounds simple enough.
I went with this on my first go around, I get the above mentioned moderate rubbing, enough to make a fair amount of noise but doesn't drag to hard. I then tried a 2.5mm spacer in place of the 1mm outboard of the guide, chainline is perfect. But when seating the opposite crank arm, I can't torque it down, it gets a hard notchy, "I'm crushing the crank arm into the BB bearings" feel.
So, I ask, what are my options here?
I'm wondering if the Renthal ring is too thick at the bolt holes, it looks pretty beafy, like 4mm beafy. I am gonna try my E-13 ring tomorrow to see if it is thinner. I'm thinking if it is, that would pull the chainline further outboard where it need to be.
Thoughts?


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 12:02 am 
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bikini loving kitty!
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Oh I can totally help! Your renthal ring is meant for single speed applications not in a guide like you are using. If you order a new E-13 that you just tried you should be all set.

:thumbup:


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 12:08 am 
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pussy
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Anything else we can help with? :whistle:


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 12:24 am 
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bikini loving kitty!
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the voices, can you make them stop?


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 12:25 am 
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pussy
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60% of the time, a banhammer works every time!


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 12:48 am 
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bikini loving kitty!
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:violence-hammer:


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 1:05 am 
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lil' hucker
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joe-it-all wrote:
the voices, can you make them stop?


So far, they have given you great advice.

I would keep listening.


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 10:44 am 
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bad kitty!
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net wurker wrote:
joe-it-all wrote:
the voices, can you make them stop?


So far, they have given you great advice.

I would keep listening.


Exactly ;)

The Renthal ring is not going to fit. Even if you could machine it, it's still a dud, as I recall the dimensions of it.


Magura :)

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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 11:03 am 
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yappin' kitty
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Location: Dallas, TX
They should make the renthal ring asymmetrical to allow for minor chain line adjustments. As long as it is that thick, right?

As far as the voices go just remember; it could be worse.
Image

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 Post subject: Re: MRP chainguide HALP!
PostPosted: Thu Apr 04, 2013 11:13 am 
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bikini loving kitty!
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Lessons learnt. Guess it'll go in the parts bin for the next build.
:thinking:


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Fri Apr 05, 2013 2:45 am 
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timid kitty

Joined: Sun Mar 03, 2013 5:01 pm
Posts: 67
Location: Burlington, Ontario
I recently installed an ethirteen srs+ guide. amazingly simple. if you're looking for a new one I highly recommend it


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 Post subject: Re: MRP chainguide HALP!
PostPosted: Fri Apr 05, 2013 2:53 am 
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bikini loving kitty!
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From BikeRadar: "A brilliant bit of kit that weighs bugger all". Nice.
I got the new MRP on ebay for cheap and because it was the BB mount style. It seems nice, runs fairly quiet, not quite as much as my Straitline Silent Guide. The guide's hollow bolts I snapped were annoying. We'll see how it stands up to my hack'ish smashing of boulders soon enough.


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