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Discussion Starter #1
Before anyone asks why, I have almost enough spare parts to build a rolling chassis, so why not. It would make a pretty nice SM I think. I have a feeling the motor would fit, it is a little motor.
 

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but my only thing would be how much weight would that add? and i think it would deff be too wide...
 

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Discussion Starter #4
Yeah, it would be a tight fit and probably add 30 or 40 pounds. I might try to go to the dealership this weekend with a measuring tape and look at a ex500. Here is a pic, I scaled the pictures so the back wheels were the same size.

First problem is tank and radiators wouldnt fit as they are.
 

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I think one of your biggest problems would be getting the sprockets to line up.

Good luck!

(I think using an SV650 engine would be F'N sweet though!!!!)
 

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Discussion Starter #6
The sprockets look like they would be reasonably close since the stock EX uses a 130 tire and the XRR can use a 150 without the chain hitting the tire. IF the motor fit in the frame with little trouble it shouldnt be super hard to pull off since they are both cradle frames. If XRR motors were cheaper I wouldnt consider this but these motors are so much cheaper you could put together an XRR pretty cheap if it fit. I found that the EX500 motor is 115# and the XRR motor is 90, so it is a 25# difference. Then there is fitting a battery somewhere! Maybe too much work if it is just to make a cheap XRR.
 

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The sprockets look like they would be reasonably close since the stock EX uses a 130 tire and the XRR can use a 150 without the chain hitting the tire. IF the motor fit in the frame with little trouble it shouldnt be super hard to pull off since they are both cradle frames. If XRR motors were cheaper I wouldnt consider this but these motors are so much cheaper you could put together an XRR pretty cheap if it fit. I found that the EX500 motor is 115# and the XRR motor is 90, so it is a 25# difference. Then there is fitting a battery somewhere! Maybe too much work if it is just to make a cheap XRR.
Hell if your going to do this why dont you go for a 600? You could get a CBR/GSXR/R6 motor off a wreched bike for a good price. know that sounds like the ultimate bike. The ability of owning the twisties and the straights:thumbup:
 

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Discussion Starter #9
I was trying to think of a motor that is cheap and might possibly fit well in the frame. A 600 supersport motor would be nice but it would be heavier and stick out oddly. An SV650 motor is not made to fit in a cradle frame, so that would be very hard to fit. What other motor would fit well? It needs to be from a cradle frame bike and pretty small. I thought of a GS500 but its 2 valve and air cooled, so thats out.
 
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