fender bracket for f4i forks - Wrist Twisters
 
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post #1 of 11 Old 10-03-2014, 10:14 AM Thread Starter
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fender bracket for f4i forks

hello,
i need help with fabricating fender brackets for my f4i forks to work with 919 fender...
any tip is appreciated, drawings, dimensions, pics,,,
thank you in advance!

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post #2 of 11 Old 10-03-2014, 08:48 PM Thread Starter
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anybody!?

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post #3 of 11 Old 10-03-2014, 09:07 PM
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post #4 of 11 Old 10-03-2014, 09:18 PM
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Quote:
Originally Posted by vukmang View Post
hello,
i need help with fabricating fender brackets for my f4i forks to work with 919 fender...
any tip is appreciated, drawings, dimensions, pics,,,
thank you in advance!
Not sure if Helimech is still making them but mine works great!

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post #5 of 11 Old 10-03-2014, 09:44 PM Thread Starter
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I've contacted him but he doesn't do them any more and he can't help,,,anyways thanks guys, ill try my best to fabricate them i guess...

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post #6 of 11 Old 10-04-2014, 06:12 AM
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Yeah I have given up on making the F4i/919 fender brackets. I sold off all of my f4i parts when i switched to the RC51 front end.

Are the forks on the bike yet? The easiest way to make something is to install the F4i forks and the 919 fender using the aft bolt. Then use a piece of pipe strapping to mock up the brackets. The pipe strapping all ready has holes in it and is easy to bend by hand & trim with hand shears. Once you have a general shape that will work remove them and mark the bend lines with a sharpie, then flatten ONE of pipe strapping pieces back out ..... one will be your general template for before bending ..... the other will be the template for after the bends are complete.

Find some material to make your final brackets from & lay the pipe strapping over top to trace out your template. Don't pick up any holes yet. Next mark out your bend lines and start tweaking it in a vice or break until it starts to look close to the second templates shape.

Slide the new bracket into the slot/pocket on the underside of the fender and see how it lines up with the bottom boss on the F4i fork. Once you are happy with the fitment .... mark the top hole with the sharpie and remove and drill ..... reinstall the bracket and bolt on the top hole ..... now see what tweaks and adjustments you need to make to the bottom of the bracket to get it to line up cleanly. Once you are happy with that you can touch drill it while installed to mark the bottom hole location, then remove and finish drilling the bottom hole. Once you get one made the second one is easier.

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post #7 of 11 Old 10-04-2014, 08:40 AM Thread Starter
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thank you HelliMach.
ill post the pics once I'm done,,,sunday should be the day to do it.

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post #8 of 11 Old 10-04-2014, 10:10 AM
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No problem man.

On my personal set I opened up the lower attachment hole on the F4i fork so I could use a 10mm nut and stainless hardware that I had on hand. I also used a die grinder & file to remove some material to make the mounting point flat and to give enough space for the nut on the inside.

Mounting the bracket on the inside of the lower attachment mount looks cleaner but is hard to pull off ..... you end up with a really low edge distance between the hole and the side of the material. If you remove a little material off the F4i fork lower and open up the hole a bit its much easier to get things lined up and secure.

Take your time and cut enough material to make a few attempts at it. I used stainless .... which was a PITA to work with but looked great.

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post #9 of 11 Old 10-04-2014, 10:28 AM
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Quote:
Originally Posted by HeliMech View Post
No problem man.

On my personal set I opened up the lower attachment hole on the F4i fork so I could use a 10mm nut and stainless hardware that I had on hand. I also used a die grinder & file to remove some material to make the mounting point flat and to give enough space for the nut on the inside.

Mounting the bracket on the inside of the lower attachment mount looks cleaner but is hard to pull off ..... you end up with a really low edge distance between the hole and the side of the material. If you remove a little material off the F4i fork lower and open up the hole a bit its much easier to get things lined up and secure.

Take your time and cut enough material to make a few attempts at it. I used stainless .... which was a PITA to work with but looked great.
Agree this would be cleaner; had I realized before I had my forks powder-coated I might have done the same. Just for comparison, I made my brackets to attach to the outside of the mount:




Not the best looking, but not bad. Fender is very solid, though.

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post #10 of 11 Old 10-04-2014, 02:32 PM Thread Starter
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wow, what a lena front end....i wish mine is that clean!
well thank you superdog.

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post #11 of 11 Old 10-04-2014, 04:57 PM
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Those look great Superdog!

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