[77 750 engine in 81 650 frame?]

Alright, you guys have talked me into it. 

Gonna wrap up replacing the reg/rec, cleaning the carbs and fuel tank on the 650 and hop on this 750 project! 

 

 

 

[77 750 engine in 81 650 frame?]

1 hour ago, gsx said:

If you still got bike in picture two , finish it and forget bout the 650 

I do, but I still need to figure out how to get the rear and front sprocket to align.  As well a ton of other things to do, the 650 is ready to ride. 

 

 

[77 750 engine in 81 650 frame?]

Hello everyone! 

 

So I've had this 1977 GS750 for years and years now. I tore it apart and founf out it was bored over and had high comp Pop Yoshimura pistons in it. 

 

I decided to upgrade the suspension to fit the engine, so I drilled out the frame and installed a GS1100 swing arm for wider tires. I also picked up GSXR USD forks for the front and GSXR wheels all around. Life got in the way and I never finished the project. 

 

However now I have a complete and very sweet looking GS650, from what I've read the 650 and 750 engine are pretty similar. Are the engine mounting points similar as well? Has any one dropped an 8 valve 750 engine into an 8 valve 650 frame?  

 

I really want to get that 750 engine going again as it was just a total monster. 

 

Let me know if you guys want any more pics of both bikes.