Author Topic: 03' gsxr fork swap/ stem damaged?  (Read 1202 times)

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Offline Shtonecb500

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03' gsxr fork swap/ stem damaged?
« on: March 04, 2018, 11:27:07 AM »
This is damage or a mod, right?

that cant be stock.
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Offline 754

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Re: 03' gsxr fork swap/ stem damaged?
« Reply #1 on: March 04, 2018, 11:45:56 AM »
It's not right, needs a replacement.
 Not sure what happened to it, maybe corrosion? ..strange.
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Offline strynboen

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Re: 03' gsxr fork swap/ stem damaged?
« Reply #2 on: March 04, 2018, 12:03:53 PM »
vater can give strong korosion..specily if rustfree steel and aluminium are araund..is there still solid metall to hold..look a bit unsafe..
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Re: 03' gsxr fork swap/ stem damaged?
« Reply #3 on: March 04, 2018, 12:06:14 PM »
That doesn't look like mere corrosion.  Whatever the cause, that stem needs to be replaced.
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Offline Shtonecb500

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Re: 03' gsxr fork swap/ stem damaged?
« Reply #4 on: March 04, 2018, 12:35:11 PM »
Ok thanks guys. Luckily I have another front end to use, I'll source another stem.
73/74'' CB500/550 resto-mod - sold
75' 750f 91' cbr f2 swap cafe - mock up
74' 750 chopper hardtail - complete - sold
74' CB750/836kit - Black mix & match - daily rider - always tweaking
71' cb500 K0 survivor - complete
71' K1 - CANDY GOLD/BROWN Winton kit - in process

Offline calj737

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Re: 03' gsxr fork swap/ stem damaged?
« Reply #5 on: March 04, 2018, 02:23:46 PM »
You can get a swap stem from cognito.
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Offline Shtonecb500

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Re: 03' gsxr fork swap/ stem damaged?
« Reply #6 on: March 04, 2018, 05:04:09 PM »
i have a 98' front end that I can steal the stem from, or I could just use the 98' set up...Anyone know of the pro and cons of using the older fork or should I just swap the stem to the newer set up
73/74'' CB500/550 resto-mod - sold
75' 750f 91' cbr f2 swap cafe - mock up
74' 750 chopper hardtail - complete - sold
74' CB750/836kit - Black mix & match - daily rider - always tweaking
71' cb500 K0 survivor - complete
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Re: 03' gsxr fork swap/ stem damaged?
« Reply #7 on: March 05, 2018, 08:41:21 AM »
It's difficult to provide more advice, because we don't know which model GSXR donor and which model CB recipient.

It you are installing onto a 550/500/650 front, the stock GSXR stem can be used.  If you are installing onto a 750, you will need a longer stem.

It is likely that a 1998 GSXR front will have conventional forks -- as opposed to the 2003 Upside-Down forks.  The 98 forks might be lighter (an advantage), but the 2003 will be slightly advanced -- though both front ends will be a leap ahead of the stock CB front.

It does not appear that you are concerned with the decreased offset (distance between the fork tubes and steering stem) of a modern front versus the stock offset of the CB.  Although a modern front will be an improvement to handling and braking, a smaller offset (35mm for the GSXR from the stock CB500/550 45mm or more for a CB750) will make the bike a bit more twitchy.  It will cost more, but you should think about triple trees to restore the offset.  Your bike, your skin/bones, so that's up to you.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

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1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
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Offline Shtonecb500

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Re: 03' gsxr fork swap/ stem damaged?
« Reply #8 on: March 05, 2018, 09:12:40 AM »
Hey Sorry for a lack of information, both set of forks are traditional and not upside down. I guess my question was self explanatory considering the 03 will have newer components and thats that. I will be addressing the offset issue with this swap but only when $$$ permits.

The project bike is a 74' 550. Ill just press out the stem and stick it on the 03 forks.
73/74'' CB500/550 resto-mod - sold
75' 750f 91' cbr f2 swap cafe - mock up
74' 750 chopper hardtail - complete - sold
74' CB750/836kit - Black mix & match - daily rider - always tweaking
71' cb500 K0 survivor - complete
71' K1 - CANDY GOLD/BROWN Winton kit - in process

Offline SOHC4 Cafe Racer Fan

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Re: 03' gsxr fork swap/ stem damaged?
« Reply #9 on: March 05, 2018, 03:00:41 PM »
Hey Sorry for a lack of information, both set of forks are traditional and not upside down. I guess my question was self explanatory considering the 03 will have newer components and thats that. I will be addressing the offset issue with this swap but only when $$$ permits.

The project bike is a 74' 550. Ill just press out the stem and stick it on the 03 forks.

Sounds like a solid plan for now. If you feel so inclined, you might re-name the subject and make this your build thread, so we can follow along and you can post questions, etc. as issues come up.

Welcome!
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold