BMAX4-III Steering crank posts fragile

[cpzao]

Hi,

I was revisioning my BMAX-4 and I noticed the steering crank posts were broken, a bit above the end of the bolt that tightens to the chassis. Has anyone experienced this? How did you solve it?

I'm thinking putting a slightly bigger bolt.

Cheers

[neallewis]

yup. I've posted about this before. the screw ends at the same point of the bearing inside the steering crank. it creates a weak point, that sheers. I've used a longer CS screw. it may have been 12mm or 16mm. The post is not threaded entirely, so you hit the end at some point. use the longest screw you can.

[cpzao]

Nice,

thanks Neal

[neallewis]

I replaced with 12mm CS bolts. original ones are 8mm. I think 16mm are too long. Shown are original 8mm bolts in the broken posts. The point of sheering is right at the top of the bearing. I think the longer bolts will stop this unfortunate fault.

[dikke hond]

[skyaflake]

Ran into a wall or something ? I made some weird crashes but everything is still fine

[neallewis]

Originally Posted by skyaflake

Ran into a wall or something ? I made some weird crashes but everything is still fine

no, just normal use. no serious crashes. no other damage. I've spoken to quite a few who have had the same issue.

[nivek]

IF YOU WATCHED NEAL DRIVE YOU WOULD UNDERSTAND

[neallewis]

Originally Posted by nivek

IF YOU WATCHED NEAL DRIVE YOU WOULD UNDERSTAND

[cpzao]

lol,

no, just regular driving. The car didn't become uncontrollable or anything of that sort. I just noticed the steering was a bit loosy. I was disassembling it to put some shims, when I noticed the crank posts were broken :P.

I'll try the 12mm bolts!!