71 engine in a 74 frame

[ProSimex]

Ive been thinking of throwing my 71 engine into my 74, cus the 74 is getting a bit tired and the 71 is already out of frame and halfway through a teardown


Is this a simple bolt on affair or would this require some machining?

 

[Patches]

does your 71 have electric start or is it a XS1 motor?

The XS1 has different front motor mount locations.

 

[XSLeo]

The early frames, before 74 are built different.
All the engine mount points on the engines are the same.
Use the 74 mounts in the 74 frame and the 71 engine will bolt right in.
Leo

 

[ProSimex]

awesome thanks!

 

[Patches]

No, the XS1 motor is different.

Hence the previous questions.........

 

[hmusket]

The front motor mounts are different. Check out the following thread, http://www.xs650.com/forum/showthread.php?t=10477 Start reading at posting #8 by gggGary.

 

[ProSimex]

very good, thanks guys. I guess Ill just button that one up for my chopper project and pull the 74 this winter.

 

[NONclow]

Hi guys, fairly new here, anyways... I've got an '80 SG motor in my '71. All I did was drill out the ('71) front mount plates where they bolt to the engine. I then used the '71 top mount. -no problems-

 

[gggGary]

Yup it's not a big deal but not "quite" plug and play putting 70-71 engines into later frames.

 

[ProSimex]

awesome guys ill keep that in mind. Maby I will hotrod the 71, but the 74 is still doing great.