I have a 2004 XL Santa Cruz Blur (XT integrated build kit, FOX RL in the back and FOX RLC in front) that is ghost shifting on me. The problem usually occurs when travelling at about 30 km/h over small roots and rolling bumps when the bike is in the middle ring and on the 5,6 and 7 cogs of the cassette. The problem also occurs in the big ring (I am having a hard time figuring out if the bike is shifting up or down the cassette - I am using rapid rise derailleur) - I have not checked the shifting yet with the shock off and the suspension compressed at various points in the travel.
So far I have checked the derailleur hanger with the PARK tool and it is straight - there is no damage to the derailleur what so ever. Bolts are all tight including the cassette lock ring. The bike has about 600 km on it and the drive train is still great condition - no shark toothing. I have put new cables and housing on - and I am now using the Nokon cable housing. The cable housing runs are short, but not excessively short. I had to use a dremel tool to grind some of the cable housing mount because it is not sitting at the right angle so the cable was rubbing slightly (this is the top cable housing mount on the rear triangle). I have the B-tension in all the way and limits set correctly, chain length is good and I recently added more tension to the derailleur sping by changing the spring hole to increase the overall chain tension and limit the chain from slapping all over the place. I have played a lot with cable tension with minimal success. The rear triangle was checked as well and is within tolerance. I am running out of ideas and my local bike shops are stumped or unhelpful.
A couple of things that I was thinking was to change the chain from the XT to a SRAM and or run one piece of housing from the top tube mount to the derailleur and zip tie it down.
Other than that I am out of thoughts and I cannot find any other threads of other Blur owners experiencing the same problem. If you are experiencing a similar problem can you please shed some light on this issue. This problem is starting to become very frustrating. I have attached a couple of pictures so you can have a look at the cable routing. Thank you for your time. B
So far I have checked the derailleur hanger with the PARK tool and it is straight - there is no damage to the derailleur what so ever. Bolts are all tight including the cassette lock ring. The bike has about 600 km on it and the drive train is still great condition - no shark toothing. I have put new cables and housing on - and I am now using the Nokon cable housing. The cable housing runs are short, but not excessively short. I had to use a dremel tool to grind some of the cable housing mount because it is not sitting at the right angle so the cable was rubbing slightly (this is the top cable housing mount on the rear triangle). I have the B-tension in all the way and limits set correctly, chain length is good and I recently added more tension to the derailleur sping by changing the spring hole to increase the overall chain tension and limit the chain from slapping all over the place. I have played a lot with cable tension with minimal success. The rear triangle was checked as well and is within tolerance. I am running out of ideas and my local bike shops are stumped or unhelpful.
A couple of things that I was thinking was to change the chain from the XT to a SRAM and or run one piece of housing from the top tube mount to the derailleur and zip tie it down.
Other than that I am out of thoughts and I cannot find any other threads of other Blur owners experiencing the same problem. If you are experiencing a similar problem can you please shed some light on this issue. This problem is starting to become very frustrating. I have attached a couple of pictures so you can have a look at the cable routing. Thank you for your time. B
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