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163 Posts
Carbon Fender FUN
So, I landed a small windfall from selling some old bike stuff,... decided to burn it vs invest it lol.
Of course, I ordered a carbon fiber front fender....pulled the OE fender off and mounted the carbon version ( stupid light but not flimsy/flexy)
....maybe its just ME,... but what's wrong with this picture :
DOH!
Mmmm yeah... need to bring the whole thing DOWN ffs..... how the hell am I gunna manage tha........
Hmmmmm...
!
The front fender has a nice 3/4in. deep divot molded into the side of the carbon with a hole for the mounting bolt.
This attachment point is almost perfect, but it's molded in approx. 1 in. too low, so when its all bolted up properly, the fender sits almost 2 inches above
the tire (!!) and looks kind of like........Ass.
Took me a cpl hours to figure out a way to fix this w/o having to mix up a batch of resin & dig out the 2k twill CF.
So, to "keep it simple" sort of,... kinda,.... not really... I actually ended up with a solid solution, using hardware on hand to make it work, (never throw anything away!)
First, I slotted the rear most fender mount points, 2 holes in the CF on either side to meet the rear fender mount lugs on the fork, slotted vertically to allow the rear of the fender to drop...
Next, I fabricated a set of "drop links" from 1/8 x 1in. alloy bar stock.. approx 1.5 inches long, oval shaped w/holes drilled 1/4 inch from each end,
Custom mounting Hardware...
The black "drop links" bolt directly to the inside of the fender mount lugs on the front side of the fork, using countersink titanium M6 bolts, the hole in the lug goes all the way thru, so a bolt threads in easily from the back side, I countersunk, the hole in the drop links & the Ti. bolt goes in flush to eliminate any profile....
Test fitting:
The 1.25in. long M8 titanium tubes slip over the front mounting bolts & using stupid thin SS washers up against the carbon, they support the fender mount point from the inside, & they terminate at the drop link. When bolted up, the fender is locked into place solidly, about an inch + lower than before..does not move, barely flexes.
You can just make out the bare Ti. stand-off tubes from the low front view here ....
Ti stand off tubes painted, final tweaks & install pics.:
MUCH better ...
BEFORE AFTER
The fender now sits 1.2 +- inches closer to the tire, looks way more "right".
I went conservative, considering potential tire growth at speed, (I knew little to nothing about this, other than it can happen..) I didn't want to go super low...
Now I know that hot tires at speed rarely grow more than a cpl of fractions of an inch apparently .... (likely negligible growth at MY speeds..)...
I'll be dropping the thing another half in. easy... ;-)
Yep,.. I just may have a little too much time on my hands...
Next episode... - Zx14 RR shock swap + custom bracket fab. for "Yuge ass" TPMS display unit..
So, I landed a small windfall from selling some old bike stuff,... decided to burn it vs invest it lol.
Of course, I ordered a carbon fiber front fender....pulled the OE fender off and mounted the carbon version ( stupid light but not flimsy/flexy)
....maybe its just ME,... but what's wrong with this picture :
DOH!
Mmmm yeah... need to bring the whole thing DOWN ffs..... how the hell am I gunna manage tha........
Hmmmmm...
The front fender has a nice 3/4in. deep divot molded into the side of the carbon with a hole for the mounting bolt.
This attachment point is almost perfect, but it's molded in approx. 1 in. too low, so when its all bolted up properly, the fender sits almost 2 inches above
the tire (!!) and looks kind of like........Ass.
Took me a cpl hours to figure out a way to fix this w/o having to mix up a batch of resin & dig out the 2k twill CF.
So, to "keep it simple" sort of,... kinda,.... not really... I actually ended up with a solid solution, using hardware on hand to make it work, (never throw anything away!)
First, I slotted the rear most fender mount points, 2 holes in the CF on either side to meet the rear fender mount lugs on the fork, slotted vertically to allow the rear of the fender to drop...
Next, I fabricated a set of "drop links" from 1/8 x 1in. alloy bar stock.. approx 1.5 inches long, oval shaped w/holes drilled 1/4 inch from each end,
- sourced some extended - 40mm titanium M6 bolts from my collection,
- fabbed up a set of "stand-off/supports" from 8mm titanium tube to slip over the mounting bolts, tie the back of the fender mount point to the "drop link" with a little bit of proper support and hopefully rigidity.
Custom mounting Hardware...
The black "drop links" bolt directly to the inside of the fender mount lugs on the front side of the fork, using countersink titanium M6 bolts, the hole in the lug goes all the way thru, so a bolt threads in easily from the back side, I countersunk, the hole in the drop links & the Ti. bolt goes in flush to eliminate any profile....
Test fitting:
The 1.25in. long M8 titanium tubes slip over the front mounting bolts & using stupid thin SS washers up against the carbon, they support the fender mount point from the inside, & they terminate at the drop link. When bolted up, the fender is locked into place solidly, about an inch + lower than before..does not move, barely flexes.
You can just make out the bare Ti. stand-off tubes from the low front view here ....
Ti stand off tubes painted, final tweaks & install pics.:
MUCH better ...
BEFORE AFTER
The fender now sits 1.2 +- inches closer to the tire, looks way more "right".
I went conservative, considering potential tire growth at speed, (I knew little to nothing about this, other than it can happen..) I didn't want to go super low...
Now I know that hot tires at speed rarely grow more than a cpl of fractions of an inch apparently .... (likely negligible growth at MY speeds..)...
I'll be dropping the thing another half in. easy... ;-)
Yep,.. I just may have a little too much time on my hands...
Next episode... - Zx14 RR shock swap + custom bracket fab. for "Yuge ass" TPMS display unit..