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Discussion Starter #1
I run an '04 SP2 and was wondering if the '00-'01 SP1 swingarm was lighter or not? I know that the total length of the bike is less and i've heard of swapping an SP1 onto an SP2, but i'm looking at lightening the bike up a little more. Any ideas and if so has anyone done that to theirs? Thanks
 

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It's a lot of work for a questionable/nominal gain. There is probably a reason why it's not a popular swap, it's going backwards.
The SP1 swingarm is indeed shorter. For the work involved, it might be smarter to add an airbox, lose weight in the tank or have it tuned by a professional with experience in these bikes.
 

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Honda also redesigned the swing arm to be "stiffer" to get power to the pavement faster...so the nominal weight savings may be overridden by this ability.
 

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Discussion Starter #4
Thanks!

As of now I have PAIR valve delete, soft rev limiter delete, K&nN filters, intake flap delete, Power Commander USB III and some titanium Sato pipes. I'm trying to lose weight or make more power or both! I had a set of forged rims until an accident took care of those. I guess i'm going to start looking for titanium bits and pieces to swap out with.
 

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From the reported improvements of the SP2 over the SP1.
The SP2 swingarm is 115 gm lighter than the SP1 swingarm and 16 mm longer.
The SP2 forks are 145 gm lighter than SP1 forks.
And the SP2 frame is 260 gm lighter than the SP1 frame.
So if correct, the SP2 chassis is a little over 1/2 a Kg lighter than the SP1.
 

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for the price vs performance gains with regards to the amount of titanium you can get your better off getting some light weight wheels and rotors along with doing the 520 conversion.... you get improvements in acceleration, corner handling and overall weight reduction.
 
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