GSXR 600 Engine Mount Help

[khan]

Hello, so I have a Murray Go kart frame (Picture is not mine, just one I found off of the internet. My frame is covered in rust, doesnt have front shocks or a roll bar and is currently in pieces). I also have the engine off of a GSXR 600 bike and I need some help mounting it on. The issue isnt fabricating mounts how ever, I'm concerned about how the back end of the chassis will support the engine since it is only connected to the front via 2 shocks and 2 other bolts. Would I need to add an extra shock in the back (to maintain the suspension)? Or would I have to scrap the suspension and just weld both parts of the frame together. If need be, I can get more detailed pics of the chassis and the engine. Thanks in advance for any responses.
http://i222.photobucket.com/albums/dd128/blk905pt0/Image024.jpg

 

[mysteryboy28]

That back end is called a swingarm. With the kind of power you're talking about, you're gonna want to reinforce the heck out of the entire frame, including making a very strong rollcage (not just a brush guard type roll cage like on most of the karts on this site). Triangles are key to making a strong frame. Research the heck out of building karts (especially ones with motorcycle motors), and pay closer attention to the guys that clearly KNOW what they're doing (from lots of experience). It really is a matter of life and death.

The rollcage pictured here is just a brush guard. It will crumple like paper upon a high-speed impact.

 

[khan]

Ok thank you for your input. So regarding the swingman arm, should I weld that up to the rest of the frame or let it remain connected via the bolts? Also how necessary is a roll cage (I was hoping to keep the center of gravity lower and maintain that shifter kart esque look. This will pretty much always be a street kart by the way.)

 

[mysteryboy28]

i would go with a totally different kart then. this kart pictured is a fun offroad toy. not intended to be supercharged and un-caged.

rear swingarm suspension is great for offroad riding. but if you want a shifter street kart, you are going to want a MUCH lower center of gravity. do it right. take the kart you have now and bring it back to it's former glory with a clone motor and torque converter. make a new kart (or buy a race kart frame, better yet) for the bike motor on steroids.

 

[khan]

alright then, I think you're right. I think I'm going to design the kart myself rather than buy one as I took up this project to help me getting into engineering and what not. Thanks for the input man, I appreciate it

 

[OzFab]

Basically, what you should do is use the design of a race kart & scale it up to suit the size & power of the engine. This should be an interesting build...