sp2 engine in sp1 - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 2 (permalink) Old 01-11-2011, 06:59 PM Thread Starter
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sp2 engine in sp1

ok i haved searched the forum and got 9 pages into it before i gave up. What do i have to do to make a bare sp2 motor work in my sp1. I of course have my sp1 motor complete still in the bike. Im not trying to make the sp2 throttle bodys and electrics work. I want to know if i can just swap out the bare motor, install all the sp1 stuff on the motor and everything just bolt up. Didnt they make some minor frame changes to the sp2?

2000 RC51
1985 ATC 350X
2009 Silverado SS clone
Lots and lots of guns!lol
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post #2 of 2 (permalink) Old 01-11-2011, 10:53 PM
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They welded gussets near the steering head to add additional stiffness, and dropped the rack down to 23.5 degrees to quicken steering.
They also change the engine mount hangers from cast to forged, and moved from using adjust bolts and lock rings to simple spacers.
I'd say that made life much more simpler.
The big difference is the swingarm mount spacer at the rear of the engine.
There was a discussion on Speedzilla about the spacer when installing an SP2 swingarm into an SP1 frame.
I would send Ben at RC51Parts.com a PM and ask if he has information on mounting SP2 engine in SP1 frame.
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