Is it adjustable? It’s producing friction with the chain

[SillyPosition]

Can this be adjusted? And if so how
on first gear it’s producing friction with the chain.

 

[urastus]

The chain guide? Generally it's adjustable. The photo is upside down, which may confuse people.

I have a merida and changed chain ring to smaller, so had to adjust mine. I could adjust horizontal angle and height. You want to adjust it so that it just misses the chain while you're in your lowest gear. Yours' looks quite high actually. Is it hitting the side? From that photo it is hard to tell. If it is hitting the side are you able to roll the guide forward or back to resolve the problem? I would assume it is the rear of the guide that is making contact? So just roll the guide forward on it's axis to lift the rear of the guide a smidgen?

 

[SillyPosition]

Yes, thats the chain guide.
Sorry for the upside down, I was finishing up maintenance and the bike was resting on the floor.


It doesnt seem adjustable, it has only one screw to fit it with the base that its mounted to, which is part of the crank I think.
I dont see a way for it to move forward/backward.
At the moment when the chain is on first gear, the angle that is produced causes the rear part of the chain to touch the guide's inner side

 

[Richridesmtb]

Where the guide is mounted you van probably shim it with fine washers if it is an issue. I noticed a slight rub with mine but nothing much.

 

[Richridesmtb]

I should say mounted to the frame.

 

[urastus]

Yes, thats the chain guide.
Sorry for the upside down, I was finishing up maintenance and the bike was resting on the floor.


It doesnt seem adjustable, it has only one screw to fit it with the base that its mounted to, which is part of the crank I think.
I dont see a way for it to move forward/backward.
At the moment when the chain is on first gear, the angle that is produced causes the rear part of the chain to touch the guide's inner side

not forward or backwards. If you loosen the one screw, are you able to rotate the guide a bit on it's axis? Rotate a bit clockwise perhaps?

 

[Richridesmtb]

No rotation is possible with the design from memory.

 

[cookie70]

get some thin washers to put between the guide and mount, adjust as required. If it needs to go the other way then nothing you can do apart from maybe sand down the guide!

 

[SillyPosition]

There is only a way to slide it up or down.
That screw is attaching the guide onto a rail that moves only on the Y-axis.
My problem is that when the chain is set to the first gear, the chain is bent from the crank towards the inside of the frame by the rear derailleur
By itself everything (with respect to gears, cassette, derailleur) looks properly set, its only the frame guide, that due to that angle caused when in first gear, is touching the chain in its rear part.

I cant use washers because it will make it even worse. The part of the guard that is touching the frame is the internal one, closer to the frame, so a washer will only make the guard facing further away from the frame.

Am I the only one having this? Maybe its not so bad?
I was installing invisiframe, and then got myself cleaning the chain, oiling it etc..and then while shifting gears I noticed this. I dont recall if I had it before.

 

[Richridesmtb]

If you have a look at the Rise bluepaper the washers are between the mount and the frame. Grab some thinner washers.

 

[SillyPosition]

Thanks.
I think I only made my situation worse...
Now Im unable to tighten it back with the original washers.
So I cant even test if adding a single washer to only one of the screws might help or not.
The screws can be tighten back if Im not using the original washer at all, but then the guard is not properly aligned.
Any suggestions?
Maybe should I ride without the chain guide in the meanwhile (I dont ride extremely rough, dont do crazy jumps), and just get a better one that allows a bit more fine tuning?

 

[Pokitren]

Can this be adjusted? And if so how
on first gear it’s producing friction with the chain.

View attachment 88177

A friend of mine had a similar situation on her bike. It turned out to be a factory defect.

 

[Richridesmtb]

Hi, I couldn't quite follow why you couldn't reinstall the original washers.

The MRP chain guides and bash guards use different thickness washers to get the guide aligned which is what made me think of trying a different thickness.

As the above post mentions, it could be a defect. If it is just bent you could try bending it slightly to get it aligned. That was going to be my first suggestion before thinking of washers. Put it in a vise and give it a slight bend to align it.

 

[SillyPosition]

I couldnt reinstall the original washers as the screw thread or the engine thread may be a bit wore down, I guess.
Maybe the screw?
I wasnt able to find the same screw at the local stores in my town so I eventually found this alternative for now:
1. Plugged back the guide to the engine with the original screws, without washers. I added some loctite just in case. I dont have a torque screw yet (bought one, but its still in transport), so I applied very small force to make sure its closed, and I'll keep on checking its not getting loose. The reason is that obviously Im afraid to wear down the engine's screw parts.
2. Added two small washers on the actual guide (the small plastic piece), it is connected with a screw to the metal plate that is attached to the motor. I managed to have it properly sitting without touching. The only downside is that if getting a strong hit it can move up/down, because its no longer sitting in the rail it has there.

Im not comfortable keep messing with it for now. I wonder how critical it is to remain as is with no washers and some movement freedom in a case of a hit?

I do wish to ask:
1. Should I get a better chain guide, and if so, which one would fit and get the job done?
2. Where can I get the exact screws, at the same length and also slightly longer (there is a room for about 4mm more in that thread)?

 

[mark.ai]

Just remember as well to check the clearance while the suspension is compressed, and not while there is nobody riding the bike.

 

[Chicane]

I took a Dremel to mine and n further issues with rubbing.

 

[cookie70]

Never noticed it on mine, maybe remove it see how it goes?

 

[urastus]

is the guide able to move forward? Are you able to adjust the mount so that the guide goes further forward?

If not, and it really bugs you, I imagine it is the inside surface of the rear of the guide - you could shave that or even cut it off square with the mount. Just the inside rear of the guide, so that most of the guide is still in place.

 

[SillyPosition]

Guide cant move forward.
I was able to hack it tough - I reattached the guide rail to the engine without using the washers, and added very small washers to the guide upper plastic part (the actual "guide"). It doesnt sit in that rail anymore (that allows it to move only up/down), and with a force can also rotate on its screw, but I think its fine as is. It doesnt touch the chain in any gear anymore.
Overall from what I've read on the internet chain guides are sort of irrelevant when the derailleurs has a clutch mechanism. so the chain is usually streched. But anyway, since I managed to make it work, Im keeping it this way..

 

[urastus]

Overall from what I've read on the internet chain guides are sort of irrelevant when the derailleurs has a clutch mechanism. so the chain is usually streched

watch from 50" in

 

[cookie70]

Overall from what I've read on the internet chain guides are sort of irrelevant when the derailleurs has a clutch mechanism.

For 90% of riders I agree. I tried running no chain guide on my Banshee titan, it was ok apart from when I raced, always had the chain come off!
Ive been wanting to go up chainring size on the Rise, however, I'm not keen to not run the guide. Could really make a mess of the crank or the frame if it came off!

 

[MikeL_mtb]

I took mine off and haven't dropped a chain yet, even on some really chunky trails and full bottom out drops.