tonk Posted October 20, 2020 Report Share Posted October 20, 2020 Bit of a headscratcher this one, for me at least. After about 45 minutes to an hour of enthusiastic riding, my front forks get harder and harder. To the point of discomfort and pain for my spacky paws. Is taken me a while to pinpoint the problem but it happens every time. Leave it for a a while (cake and coffee stop) and they're back to squishy normal. Wtf is going on?! Bike is a stock BMW R NINET scrambler, with rwu Showa forks - no adjustment. Quote Link to comment Share on other sites More sharing options...
Superdunc Posted October 20, 2020 Report Share Posted October 20, 2020 Air gap too small? 1 1 Quote Link to comment Share on other sites More sharing options...
TLRS Posted October 20, 2020 Report Share Posted October 20, 2020 (edited) Can't see the air temp rise so much it's creating a load of pressure. My guess would be adjuster that tightens with temp difference? When it's stiff, can you slowly push the fork in as deep as you could when it's squishy? That could point towards it being a damping issue instead of spring/airgap. Might also be worth looking at how much friction the fork has: measure travel when it's rests from being pulled out, and measure at rest from being pushed in. If those figures are far apart, something could be sticky. Edited October 20, 2020 by TLRS 1 Quote Link to comment Share on other sites More sharing options...
tonk Posted October 20, 2020 Author Report Share Posted October 20, 2020 I've not tried any measurements yet, didn't think of that. But I will, thanks for the suggestion. Does fork oil go like overworked brake fluid? Bubbles n stuff that render it useless. There's certainly no stickiness to them, no knocks or leaks, no play. 1 Quote Link to comment Share on other sites More sharing options...
Superdunc Posted October 20, 2020 Report Share Posted October 20, 2020 2 minutes ago, tonk said: I've not tried any measurements yet, didn't think of that. But I will, thanks for the suggestion. Does fork oil go like overworked brake fluid? Bubbles n stuff that render it useless. There's certainly no stickiness to them, no knocks or leaks, no play. Theo oil will go thinner with temp and make the damping softer. Cheap oil can foam but again this would reduce the damping. Sounds like a strip clean and fresh oil are your first point of call. 1 2 Quote Link to comment Share on other sites More sharing options...
tonk Posted October 20, 2020 Author Report Share Posted October 20, 2020 2 hours ago, Superdunc said: Theo oil will go thinner with temp and make the damping softer. Cheap oil can foam but again this would reduce the damping. Sounds like a strip clean and fresh oil are your first point of call. I agree, with some measurements beforehand to compare. I take it that I have to measure what comes out? Is there a way to tell if the oil is fucked (other than loose nuts and bolts)? Quote Link to comment Share on other sites More sharing options...
Thunderbolt Posted October 20, 2020 Report Share Posted October 20, 2020 Check all your alignment. The only time, I have found anything like this it was due to misalignment. Quote Link to comment Share on other sites More sharing options...
Jenny Pryde Posted October 21, 2020 Report Share Posted October 21, 2020 http://www.gothwitch.co.uk/spellbook/hex-curse-removal/ Quote Link to comment Share on other sites More sharing options...
Bram43 Posted October 21, 2020 Report Share Posted October 21, 2020 Leprosy*. Best cut your hands off right now before it spreads...I hope you haven’t touched your penis? *Saved you from googling for an answer. 1 Quote Link to comment Share on other sites More sharing options...
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