Cb550 R1 fork conversion

gordo2472003

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I’ve got a lead on some forks for a 99 R1. Wondering if these are the correct forks for a conversion on a 74 cb550


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gordo2472003

Been Around the Block
Update : got the forks. Found the conversion kit on cognito. Just have to find another lower triple and start brainstorming how to make my wheels match
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ridesolo

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Those look like they aren't in bad condition. My first thoughts were that forks from a R6 might be a little smaller/shorter and might look better on your 550, but maybe they'll be ok. I remember @Hurco550 had some forks from a Ninja 1000 that were pretty nice but looked massive. I guess w/o seeing these beside your 550 it would be hard to know if they will be overwhelming in size or not.
 
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Hurco550

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Those look like they aren't in bad condition. My first thoughts were that forks from a R6 might be a little smaller/shorter and might look better on your 550, but maybe they'll be ok. I remember @Hurco550 had some forks from a Ninja 1000 that were pretty nice but looked massive. I guess w/o seeing these beside your 550it would be hard to know if they will be overwhelming in size or not.
The ones I had for my 550 were conventional forks off of an early 1000 ninja, and iirc they were a good 3" to long, but that's a whole different ballgame than usd r1 forks.

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ex119x

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I would look at the wheels from a CBR600F as they would best run a 110-17 front and a 140-17 rear. Any wider than that is probably a little bit too much for your chassis. I also suspect that a wider rear won't allow for proper chain alignment or swingarm clearance. The CBR brake rotors are smaller than the R1, but any of the Honda 6 bolt rotors of the same pattern will fit. The R1 is a 298 mm rotor and several of the late 80 early 90's Hondas are a 296mm. I think the 92 VFR 750 ones would work.
 

J-Rod10

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I would look at the wheels from a CBR600F as they would best run a 110-17 front and a 140-17 rear. Any wider than that is probably a little bit too much for your chassis. I also suspect that a wider rear won't allow for proper chain alignment or swingarm clearance. The CBR brake rotors are smaller than the R1, but any of the Honda 6 bolt rotors of the same pattern will fit. The R1 is a 298 mm rotor and several of the late 80 early 90's Hondas are a 296mm. I think the 92 VFR 750 ones would work.
You can run a F2 rear on a stock 500/550 arm with a 160. Just takes a bit of machine work on the sprocket carrier to line the sprockets up, and weld on a stop for the caliper stay. All of 45 minutes worth of work.

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ex119x

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You can run a F2 rear on a stock 500/550 arm with a 160. Just takes a bit of machine work on the sprocket carrier to line the sprockets up, and weld on a stop for the caliper stay. All of 45 minutes worth of work.

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I would just worry that a 160 might be too much tire for a 550 frame. But it might work out just fine. The F2 wheels really look good, I had a set on my Ascot race bike, but think it worked a little better with the smaller Hurricane wheels. The other thing is the FT500 or VF500 sprocket carrier is a little narrower than the F2 carrier and will still allow a 520 chain to clear the tire and help with chain alignment. The Suzuki GS500 stock 520 sprocket works on the Honda carrier for a 520 rear and the XL500s front sprocket has the same splines as the CB550 for an oem 520 conversion kit
 

gordo2472003

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As it looks right now, I can keep my current wheel and just need to replace the hub and spokes. Cognito has everything I need. Just a little pricy


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J-Rod10

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I would just worry that a 160 might be too much tire for a 550 frame. But it might work out just fine. The F2 wheels really look good, I had a set on my Ascot race bike, but think it worked a little better with the smaller Hurricane wheels. The other thing is the FT500 or VF500 sprocket carrier is a little narrower than the F2 carrier and will still allow a 520 chain to clear the tire and help with chain alignment. The Suzuki GS500 stock 520 sprocket works on the Honda carrier for a 520 rear and the XL500s front sprocket has the same splines as the CB550 for an oem 520 conversion kit
I never had any issues out of it. Granted, it isn't a race bike. I do quite like the looks of the F2 wheels, and the F2 front end isn't a bad addition either.
Screenshot_20201201-082500.jpg


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ex119x

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You're right, it looks quite nice and for a street bike, I doubt there would be any noticeable difference in performance.
 

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