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  1. #251
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    The shims can be hand made with scissors cutting out thin plastic such as water bottle material into split flat wide washers. Some have found split washers at a hardware store that can fit.

    Always check seat tube clearance by removing the coil or deflating the air shock and sitting on the bike, maybe bouncing LIGHTLY to add a little bottom flex, to be sure your tire does not contact the seat tube.

    Shock Bottom shim instruction...
    http://forums.mtbr.com/650b-27-5/650...ce-623853.html

  2. #252
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    Made another swap on my 27.5 build...New I9's with full XX1...made great even better!!!

    650b Mojo HD ... Heavy Duty-9230324549_4125b16e25_b.jpg

  3. #253
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    So i am looking to go cc dbair cs with my mojo hd 650b. (If you haven't seen the build is linked below.) I am running the stock 8.5/2.5 fox float that has had the travel united with spacers on the shock shaft and a volume reduction kit. This is not as easily accomplished in the dbair. I'm thinking of going with the 7.78/2.25 however a few people I have talked to who are suspension experts and sell cc aren't wild about the idea. Any thoughts??? Thanks all

  4. #254
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    i am interested in very same thing. looks like you need to remove inner can to be able to shim the travel. not sure how difficult it is.
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  5. #255
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    I just got off w Tom at ibis who emphatically told me no way on anything that is not 8.5 in 160 and 7.75 in 140 so it's all about limiting stroke

  6. #256
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    yeah, i am planing to use 8.5 so i can go back to 26" or 650b/26" combo if i want to
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  7. #257
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    Building up a mojo hd 650 from scratch.
    Trying to figure what's the best option for a fork.
    Fox 34 150mm 650b - lighter, no clearance issues
    Fox 36 talas (26") - less a2c height=lower bb, burlier
    Thoughts?
    Edit, the a2c numbers between those 2 forks are very simalir,
    Only 5mm difference, so that won't make a difference.

  8. #258
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    Also, how much lower does the 140mm mode make the bb compared to the 160mm?
    Maybe 1/4"?

  9. #259
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    Quote Originally Posted by murrdogg11 View Post
    Building up a mojo hd 650 from scratch.
    Trying to figure what's the best option for a fork.
    Fox 34 150mm 650b - lighter, no clearance issues
    Fox 36 talas (26") - less a2c height=lower bb, burlier
    Thoughts?
    Edit, the a2c numbers between those 2 forks are very simalir,
    Only 5mm difference, so that won't make a difference.
    Neither one, go with RS Pike 160. I don't have a Mojo HD, but it's in my radar screen. I do have a Pike 140 on a 29'er, and I like it better than the Fox offerings.

  10. #260
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    Quote Originally Posted by murrdogg11 View Post
    Also, how much lower does the 140mm mode make the bb compared to the 160mm?
    Maybe 1/4"?
    on my HD (26" wheels) in 140mm rear travel mode with a 150mm Revelation up front I get a 13.5" bb height, and setup with 160mm rear/160mm front (Lyrik) travel it's 13.875". those numbers are with same/similar tires. the fork height makes more difference than the choice of rear shock/chips. I've measured it with the Lyrik up front and 140mm rear and although I didn't write down the bb height, it was a lot closer to 160/160 height than 140/150 height.

  11. #261
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    Quote Originally Posted by hardboiled View Post
    on my HD (26" wheels) in 140mm rear travel mode with a 150mm Revelation up front I get a 13.5" bb height, and setup with 160mm rear/160mm front (Lyrik) travel it's 13.875". those numbers are with same/similar tires. the fork height makes more difference than the choice of rear shock/chips. I've measured it with the Lyrik up front and 140mm rear and although I didn't write down the bb height, it was a lot closer to 160/160 height than 140/150 height.
    Even differences between similarly long works can lead to significant BB height variations. A 160 Lyrik has a way shorter AC distance than a 650b-ready Vengeance. As a result, you will run much smaller tires in the Lyrik than in the Vengeance if you go with the biggest tire available (27.5" tall vs. 28" tall). Those little difference add up fairly quickly. My 160mm HD with a 160mm Vengeance, 28" tall front tire and -1deg angleset has BB static height north of 14.5". With a Lyrik and Neo Motos on a smaller rim, it was sitting around 14.2" IIRC.

  12. #262
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    does a 2.25 nobby nic clear the rear chainstay ok?
    does rim selection come into play with rear tire clearance, ie would a wider flow or a narrower arch be better?

  13. #263
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    Quote Originally Posted by murrdogg11 View Post
    does a 2.25 nobby nic clear the rear chainstay ok?
    does rim selection come into play with rear tire clearance, ie would a wider flow or a narrower arch be better?
    Both Nobby Nic and Hans Dampf 2.25 clear the rear triangle just fine.
    Yes, a rim makes a difference. A wider rim == a slightly wider and taller casing. For HD, I would definitely go Flow. I have a P35 in the front and a Light Bicycle carbon rim in the rear.

  14. #264
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    Quote Originally Posted by StiHacka View Post
    Both Nobby Nic and Hans Dampf 2.25 clear the rear triangle just fine.
    Yes, a rim makes a difference. A wider rim == a slightly wider and taller casing. For HD, I would definitely go Flow. I have a P35 in the front and a Light Bicycle carbon rim in the rear.
    Assume you mean with a shim?

  15. #265
    Bodhisattva
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    HDR not a good fit for big rubber. Here are 2.35 Hans Dampf on a Mojo 650b, I-9 torch wheels. About 3 mm of tire clearance. Small rocks & sticks got caught between tire & chainstay. Ardent clearance was slightly better. Paint at chainstay yoke completely worn off after 2 rides.

    650b Mojo HD ... Heavy Duty-img_1845.jpg650b Mojo HD ... Heavy Duty-img_1846.jpg
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  16. #266
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    I have the Fox Float 34 160 for 650b...works great and does just what a good fork should do w/ no drama. seems plenty burly to me but I am not hucking big airs.
    my only complaint is i dont like the white color...
    Quote Originally Posted by murrdogg11 View Post
    Building up a mojo hd 650 from scratch.
    Trying to figure what's the best option for a fork.
    Fox 34 150mm 650b - lighter, no clearance issues
    Fox 36 talas (26") - less a2c height=lower bb, burlier
    Thoughts?
    Edit, the a2c numbers between those 2 forks are very simalir,
    Only 5mm difference, so that won't make a difference.

  17. #267
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    Quote Originally Posted by MTB hombre View Post
    I have the Fox Float 34 160 for 650b...works great and does just what a good fork should do w/ no drama. seems plenty burly to me but I am not hucking big airs.
    my only complaint is i dont like the white color...
    any chance you could measure your bb for me?

  18. #268
    Stupid is, as stupid does
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    So I scored a used HD (135 x 12 rear axle & standard derailleur clamp) for a great price.I rode it for a week on my local trails built up as a 26. The guy I bought it from told me that a 170 fork was the magic number. I did 4 rides with a 160. After the first ride with the 170 fork I knew the 160 was never going back on. It's amazing. I found that running 35% sag worked best for me On the rear shock and my rear shock is a pushed RS Monarch RT. I plan on upgrading to a CCDBA. I brought the bike up to Big Bear for some down hilling on thirsday and rode things I have never been able to before. I am humbled by this bike.

    Being a 29er rider I want to convert to 650B asap. The bike is amazing as a 26er but with the smaller wheels I did feel the scary aspect of the wheel size. My question is I want to keep the fork set at 170. Any premonitions as to what problems I will run into? Also do I need to shim the rear shock. Any other comments?
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  19. #269
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    BB height measures out to be about 14 1/8" Fox Float 160 fork w Schwalbe Hans Dampf tires and about 25 psi
    Quote Originally Posted by murrdogg11 View Post
    any chance you could measure your bb for me?

  20. #270
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    Quote Originally Posted by MTB hombre View Post
    BB height measures out to be about 14 1/8" Fox Float 160 fork w Schwalbe Hans Dampf tires and about 25 psi
    That sounds pretty good! my reign x was around there and felt great...anyways, thanks! build kit and used frame in the mail.

  21. #271
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    Am I correct that 150 front travel probably is a better choice than 160 for my 650b HD, to better balance the rear travel on my shimmed shock?

  22. #272
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    Quote Originally Posted by OldManBike View Post
    Am I correct that 150 front travel probably is a better choice than 160 for my 650b HD, to better balance the rear travel on my shimmed shock?
    Probably not. A 150mm fork will have a shorter AC distance, OTOH the shock length stays the same, this will lead to a steeper HA and changes in handling. Honestly, if you keep your bike 160/160-10, you will not be noticing the shimmed shock unless you use the last 10mm of travel or bottom out frequently.

  23. #273
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    Re: 650b Mojo HD ... Heavy Duty

    I am running 170 XFusion Vengeance with 160 shimmed Marz Roco TST Air rear with 27.5 and its perfect! I too was in Big Bear last weekend and had a blast for two days on the new trails they added to the park...good stuff!

    Sent from my DROID RAZR HD using Tapatalk 2

  24. #274
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    Quote Originally Posted by StiHacka View Post
    Probably not. A 150mm fork will have a shorter AC distance, OTOH the shock length stays the same, this will lead to a steeper HA and changes in handling. Honestly, if you keep your bike 160/160-10, you will not be noticing the shimmed shock unless you use the last 10mm of travel or bottom out frequently.
    That makes sense, glad I asked. Thanks.

  25. #275
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    650b Mojo HD ... Heavy Duty-img_3294.jpg
    I've got my build started....
    Help me out, as I'm second guessing my fork!
    Basically i want a bike that climbs with the spandex guys and handles technical steep descents with drops and jumps.
    i've got the 160 shimmed in the rear....sooooo should i keep this 150mm pike or go with the 160mm dual air?

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