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Shock absorbers test and refurbishment

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El__burro:
its not touching while it's not moving but if i hit a bump or a hole, yes, even when I ride alone. I'll have to play with the rear mudguard to clear some distance.
thanks
el__burro


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Nurse Julie:
Gosh, that all sounds very dangerous to me. If it were mine I would take it off the road immediately and not ride it again until it's fixed...properly.

MarkCR750:
I agree with Nurse Julie, that can't be safe, either the tyre could rip the mudguard off and then jam the rear wheel or if you hit a bump mid corner whilst leant over the tyre hitting the mudguard could cause a momentary skid and you'd be into a high side, there is obviously not enough clearance in its current configuration, on my CR I put the battery in the tail, I set the bottom of the battery platform level with the top of the frame tubes, even so hitting a severe bump would result in the tyre scuffing the battery platform, I added 20mm to the bump stops in the shocks, this results in 20mm less travel (but so would carrying a pillion), anyway I think you either need longer shocks (not too long or your steering will become too quick), or you need to raise the frame hoop and mudguard.
PS I don't think just altering the angle of the mudguard will be enough, it looks from the photo that you only have a couple of inches clearance from tyre to frame hoop, that's not enough.
PPS a lower profile tyre, longer shocks and repositioning the mudguard might just do it if you don't want to rework the frame hoop, please note that any comments I have made are not recommendations and that you should have any alterations checked out by a suitably qualified mechanical engineer prior to use (phew!😄).

MrDavo:
As cool as it looks, for your own safety, and to pass an MOT probably, you've got to have some clearance left at maximum bump. You can always use ratchet straps to squash the bike down as low as it will go to test this rather than just sitting on it. The thought of the guard folding up under the gap between the tyre and seat doesn't bear thinking about, you'd be straight on your ear.

I once ruined a new tyre on a race bike by forgetting about the bolts that held the mudguard on, too long and sticking out from their nuts - they ripped into the tyre at full bump.

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