What to look for when inspecting forks - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 8 (permalink) Old 11-25-2015, 11:45 AM Thread Starter
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What to look for when inspecting forks

Hi all,

This is probably a dumb question, but I'm gonna ask it anyway. Are there any tricks or tips to inspecting the forks after a crash?

The forks on Bella seem to be fine (we crashed this summer), there isn't any visible damage, the seals aren't leaking, and during a push-test the bike tracked straight and both forks compressed and decompressed evenly and smoothly when the brake was applied.

Is there anything else to look for?

Thanks!

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post #2 of 8 (permalink) Old 11-25-2015, 06:26 PM
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take the fork legs apart and roll the stanchions on a flat surface, such as a glass table - to see if they're true. Other damage such as scratches or corrosion would be visible too.
Usually it's the stanchions that bend in an accident, but the aluminium legs can bend too, should be easy to spot the fractures if so.

HTH

Euro RC51 SP2: HRC WSB Ti Hi-Level, T1 Airbox & Snorkel, PCIII, Dymag CA5 Carbon Wheels, Ti64 Spindles (F, R & Swing Arm), Mori Link, Maxton GP7 Shock & Ohlins 832 Forks, Brembo GP Calipers & SBK narrow track (F), Braketech Disc (R), Brembo billet Underslung x 2 Brembo RCS, Tyga Triple, 7075 Stem, Probolt Titanium all over, Babyface rearsets, MR Complete Carbon Lineup, Custom Undertail & CBR 1000 LED, Watsen LED Indicators, Harris Brace, Giles clip-ons, Corbin seat, etc. 2013 BOTY.
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post #3 of 8 (permalink) Old 11-25-2015, 09:22 PM
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Take them apart and check the run out of the stanchions with one of these



and a couple of these



on what you know to be a level flat table.
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Last edited by madbuyer; 11-25-2015 at 09:24 PM.
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post #4 of 8 (permalink) Old 01-29-2016, 11:27 AM Thread Starter
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Hey folks,

I figured I'd follow up with this thread, for anyone who may search later. Sure enough, the push-n-brake test wasn't enough, with the forks out and on a bench, one of them has a leaking seal. They'll be torn down next week to check for bends and whatever else may be damaged.

Folks, don't get complacent about checking stuff after a dismount, stuff that seems or feels ok could really ruin your day later if a defect goes unnoticed.

Thanks for the feedback, guys, kick-ass as usual!
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2006 Black Edition SP2
- Stickerless black...giggity
- Assorted stone chips
- Multicolor bug splats, updated weekly
- Custom boot scratches and crash marks on the tailpiece
- Scuffed bar weights & brake lever from asphalt acrobatics
- Road grime under the fender and tail
- Leo Vince exhaust
- Otherwise OEM, not gonna make BOTY any time soon


HOE-LEE SHEE-YIT, the TORQUE!!!
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post #5 of 8 (permalink) Old 01-29-2016, 11:41 AM
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if you bent your forks you almost certainly did in your triple clamps as well. apparently the rc51 triples are made of cheese.

have a close look at them while the bike is apart
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post #6 of 8 (permalink) Old 01-31-2016, 11:28 AM Thread Starter
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Thanks Wibbly! Any specifics on this idea? What I mean is, for example, is it a case of putting a straight edge over the surface to check for twists/warps, or maybe a twist in the vertical spindle that holds the steering bearings? I'll check both in any case.

2006 Black Edition SP2
- Stickerless black...giggity
- Assorted stone chips
- Multicolor bug splats, updated weekly
- Custom boot scratches and crash marks on the tailpiece
- Scuffed bar weights & brake lever from asphalt acrobatics
- Road grime under the fender and tail
- Leo Vince exhaust
- Otherwise OEM, not gonna make BOTY any time soon


HOE-LEE SHEE-YIT, the TORQUE!!!
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post #7 of 8 (permalink) Old 01-31-2016, 02:33 PM
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Quote:
Originally Posted by BTF/PTM View Post
Thanks Wibbly! Any specifics on this idea? What I mean is, for example, is it a case of putting a straight edge over the surface to check for twists/warps, or maybe a twist in the vertical spindle that holds the steering bearings? I'll check both in any case.
One sign could be broken paint, if the metal is stressed enough it will crack the paint.

Best thing might be just to pull the triples out to measure flatness properly as well as the main steering shaft.



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post #8 of 8 (permalink) Old 02-01-2016, 09:43 AM
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pop them out and place them on a flat surface. bent ones won't sit flat.

another indication is to simply slide a pair of straight forks into them. if the forks have any trouble at all lining up, your triples are bent.
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