GT/SP3 1000 CONVERSION USING Breva 1100

[juanGe]

Hi all, I am relatively new in the Guzzi's world, just bought an old GT1000 (it might be a sp2 though), year 1992 that needs to be fully restored. To be honest, what I actually bought is an incomplete engine (with so many missing pieces that it is not worth to buy them all to revive this engine) mounted into an old frame (again, no wheels, no gear box, no transmission, etc etc), but matching numbers and documents are there 

Said that, I bought it because a friend of mine has a Breva 1100 that he could sell me for my project (he had a major accident with it and almost destroyed it -happily he just had minor injuries!!!-).

So, given the circumstances, I am planing now to convert my GT1000 into a modern cafe racer by using the parts of the crashed Breva 1100, and I would like to start with the engine. By looking at both engine block's (GT1000 and Breva 1100) externally, they look identical....

So the question is: would it be possible to "transfer" all parts of a Breva 1100 engine (everything!! including pistons, cylinders, crankshaft, etc etc) into a GT1000 block motor?

I will really appreciate your feedback. it will help me to decide if I take the Breva or I start looking for a cheap GT1000 of the nineties...

looking forward!

[rutgery]

I don’t really have an answer for you regarding swapping everything to the old lower engine block, however I do know someone who races guzzis in bott races and he uses newer engines from a Breva (or others) in a old tonti frame as the lower engine from the newer models is more sturdy and supposedly can handle more power. I’d suggest swapping the complete engine into the old frame

[jas67]

The belt driven alternator won’t fit in the Tonti frame. 
IIRC, the crank nose is different than the motors with a crank mounted alternator. 

There have been other discussions on the forum regarding similar swaps, hopefully, someone more knowledgeable will chime in shortly.

[5154guzzi]

Jas67`s recollection is correct.  The crank snout on the CARC bikes are much shorter , just enough room for a pulley, but not an alternator. You would need a crankshaft from a Tonti bike for starters. If using digiplex ignition, you would also need the correct flywheel.

[Tom]

It would be easier to do a "cafe" on the Breva 1100.