Apologies, I was looking at the settings for Cube
New Bosch CX generation 5 - seal/bush problem
- Thread starter Boogz83
- Start date
- Thread starter
- #32
Hi cube also state 30nm
Although admittedly that does feel very tight! Might be worth going 25nm with a little bit of lock tight.
Please not this is only for the 2025 generation 5 motor.
Hope this helps
Hi everyone. Today I went to check what's wrong with the engine. Something is definitely not right. As far as I know, the problem is when the engine warms up. After a climb, the engine becomes louder and there is no difference in power between tour and emtb mode. I ride in tour and switch to emtb, there is no increase in power. Something is wrong. I'm going to the dealership tomorrow and I'll let you know when I get an answer.
- Thread starter
- #34
Did you ever sort out the issue with your motor??
hello. I realized that Bosch service technicians in Croatia don't know!
As for the engine noise, I'm waiting for a response from the service, the service sent a request to Bosch.
And the fact that the tour+ and emtb is very low is due to the torque sensor. I came across a video and it was said that "gen5" has a new sensor so the engine itself is less punchy! And it's possible that it's due to the firmware. And maybe because of the rumor that an update with more NM will be released in the summer.
time will tell
Hi there, my first time posting anything anywhere but I feel this is important. Not sure if this is the correct place to post this but I have a vala x01 and after two rides I could feel the motor moving through the pedals. Further investigation revealed the non drive side bushings were moving in the frame to the extent the drive side of the frame would not of been long before breaking.
I contacted my local bike shop and went to look at a brand new bike only to see same problem. It seems someone has messed up and all the motor mount dimensions and the holes in the frames are drilled/formed too large for the bushings. I am 5 weeks in and still nothing been done under warranty.
Rather than send the bike back as not fit for purpose as I quite like it I have had my local engineering place make new bushes out of acetal. They are tight fit and larger diameter on inside so can only be fitted from inside with motor removed. This eliminates the bushings being able to come outwards. I also had the bushings made so they have a 0.5 mm tolerance laterally instead of floating so to help with lateral strength from a pedal strike as the non drive side frame can now share the loading. The main mount has a rubber busing inside so motor is still not held still and can move on the Bosch main mount as designed.
We used a couple small o rings to centralise the square threaded plate drive side as holes that side were a joke. We torqued everything up to 20nm as per Bosch spec and having done 70 miles of enduro type riding all is well.
Please see pics below of what we have done. As you can see the Bosch bushes are like new and are correct diameter it’s the frame that’s the problem.
I’m not moaning about the brand as things go wrong but this is an easy fix and hopefully will help someone sort this out.
Just a note from an above post the original bushes should be fitted from the inside so if they are coming out they are scrap and more likely the frame is the same as mine.
I have a video of the movement in the frame before modifying but I can’t seem to attach it.
I contacted my local bike shop and went to look at a brand new bike only to see same problem. It seems someone has messed up and all the motor mount dimensions and the holes in the frames are drilled/formed too large for the bushings. I am 5 weeks in and still nothing been done under warranty.
Rather than send the bike back as not fit for purpose as I quite like it I have had my local engineering place make new bushes out of acetal. They are tight fit and larger diameter on inside so can only be fitted from inside with motor removed. This eliminates the bushings being able to come outwards. I also had the bushings made so they have a 0.5 mm tolerance laterally instead of floating so to help with lateral strength from a pedal strike as the non drive side frame can now share the loading. The main mount has a rubber busing inside so motor is still not held still and can move on the Bosch main mount as designed.
We used a couple small o rings to centralise the square threaded plate drive side as holes that side were a joke. We torqued everything up to 20nm as per Bosch spec and having done 70 miles of enduro type riding all is well.
Please see pics below of what we have done. As you can see the Bosch bushes are like new and are correct diameter it’s the frame that’s the problem.
I’m not moaning about the brand as things go wrong but this is an easy fix and hopefully will help someone sort this out.
Just a note from an above post the original bushes should be fitted from the inside so if they are coming out they are scrap and more likely the frame is the same as mine.
I have a video of the movement in the frame before modifying but I can’t seem to attach it.
Nice hake you come up
I wonder if bosch will be working on something similar
Hi, nothing has changed in terms of flex as when the motor is as per Bosch/santa Cruz fitment the motor is held tight to drive side and the motor has flex from a large rubber bush inside the main motor carrier mounting bush. This is still the same. With the factory Bosch non drive side bushes fitted properly to the frame there would be very little movement as they are rubber coated and a metal bushing is under the thin rubber. Mine are acetal which is similar to nylon and can be used as a bearing surface and is self lubricating to a degree. Any movement here is only flexing the non drive side of the frame and this is not ideal. The bushes non drive side don’t need to have any flex as long as it has a little lateral float the main motor bush deals with any flex the motor requires.
I’ve not tried to re-engineer the design I’ve just rectified the fact the frame holes are too big for the Bosch bushes.
You said you have some bolts coming and I’m not sure what your plan is but I don’t think you should sandwich the whole assembly as per other motor makes. My changes keep the fundamental design the same as to what Bosch must of tested to be reliable.
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Acc. to other forums this is normal as engine is not mounted / fixed to both sides, only to the one side and that is why it looks „wrong“ on the opposite site. Unfortunately I can not find postings with description and pics - there is a special name for this special kind of mounting.
In some early deliveries bushings came out and had been replaced by Bosch via dealers.
- Thread starter
- #41
Hi, yes I think we are talking about two separate problems here. I had not got to the point where bushes were coming out. My problem was the holes the bushes sit in were over size by 1.6mm. This in turn led to a large amount of movement at the pedals from flexing the drive side of the frame. My fix remedies this and looks like it will inadvertently fix the other supposed Bosch issue too. Just to reiterate my issue is with the vala frame holes being too large for the bushes.
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Ok, any plans to sell your Vala bushings?
I have a warranty claim in so best keep them for now in case they want them back.
