Mojo SL and bobbing

irousso · Mar 16, 2011

Hi,
A buddy of mine recently bought a Mojo SL and he is suffering from a serious problem of bobbing. It got to the point where he actually considering selling the bike since he always has to use the propedal on his rear suspension. This morning he rode my HD and was blown away by the stability and stiffness of the bike's rear. I thought that one of the advantages of the DW link is that it has minimal bobbing. The first thing we looked at was to see if the air pressure was properly set - and according to the SAG it is pretty good (25%). My question is - what could be wrong? could the problem be in the actual suspension? also the bike has quite a serious feel of flex - again much more than anything I felt (rode on other SL's) before. Would appreciate any input that could assist us solving this problem.
Cheers,
Itay

derby · Mar 16, 2011

DWL pedal bob should be minimal unless using a lot of upper body motion. An the SL is not very flexy normally, as you know.

Take it back to the dealer, they can help determine if there is a structural problem.

rossp · Mar 16, 2011

having played around with my shock settings - is the rebound set very fast? that can give a bouncing feel - that's all I can suggest.....

robbieracer · Mar 16, 2011

Bobbing should be a non issue on any DW link bike that is set up correctly. .. there is something wrong :-(

redmr2_man · Mar 16, 2011

how much does he weigh?

You should see how much my mojo bounces with a coil. haha, its funny looking for sure.

irousso · Mar 17, 2011

Thanks for the replies!
He's actually relatively light (riding on a small size frame)

Record · Mar 17, 2011

Is he running a Fox RPL? If so did the seal blow and leak out all of the oil like mine did... twice? When that happens it gets springy and bobs freely.

irousso · Mar 17, 2011

I will ask him to look into that, Record, but if that is indeed the case - wouldn't it affect the initial SAG showing it to be too high?

Moto'n'PushBiker · Mar 17, 2011

If the lack of oil is affecting the compression mechanism, then this can be felt as bob and won't be noticeable while measuring sag. Compression damping requires motion of the piston:

http://www.bikeradar.com/gallery/ar...&pn=buyers-guide-to-mountain-bike-suspension-part-3&mlc=gear/in-depth/article#3

When does he feel bobbing? In saddle/out of saddle? uphill/downhill/flat? which gear is he in?

irousso · Mar 17, 2011

Its really bad. He has it while pedalling in the parking lot seated. It really looks and feels bad...

clewttu · Mar 17, 2011

a few demo bikes have shown up here with link mounts that have come loose from the frame (or cracked links) iirc in the past...somethings wrong with his bike though for sure

Diesel~ · Mar 17, 2011

rossp said:
having played around with my shock settings - is the rebound set very fast? that can give a bouncing feel - that's all I can suggest.....

Slow the rebound way down and see if it helps, as rossp mentioned. It can have a huge effect on pedal bob. Once you've made the determination, slowly ratchet it back up until you hit the sweet spot.

-D

Moto'n'PushBiker · Mar 18, 2011

irousso said:
Its really bad. He has it while pedalling in the parking lot seated. It really looks and feels bad...

Is there any way your friend could temporarily trade shocks with another Mojo to see if the shock is broken?

Mojo SL and bobbing

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