Swap out entire 1000 rear-end onto 1100?

[deathwing]

I've been considering some new projects this winter for Deathwing. One of my thoughts was to possibly upgrade to a bigger motor. I have a 1200 motor layin around, but I think itll be more work to make that happen than an 1100.

I've done a butt load of work on my 1000 (pictured). Among the work done was building a monoshock setup on it. I don't even need to get into how much work was involved to make this happen.

So here's what I'm considering and wondering: If I got a hold of an 1100 frame with motor, would I be able to swap the entire rear end from my 1000 to it? We're talking about the swing-arm, drive end, wheel, and drive shaft. I think as long as the drive-shaft can hook up to the motor correctly and the swing-arm mounts the same, it should work.

Thoughts?

[ericheath]

If your 1200 is 85-87 it will fit in easily. 84 and 1100's have ignition in the back which runs into the cross frame a little, the one across from the P in your license plate in the top pic. Ignition can be removed and cams and ignition from the 1000 will work on 1100 heads. With a 1000 rear end, they are quicker off the line, but sing a little high on interstates. I love mine around the city. Several have done the swaps with 11's and 12's. The swing arms will swap with some work, yours a bit more for monoshock. 11 or 1200 front ends swap in easily for beefier front forks.

[wingrider]

If you have a 1200 laying around, I'd be pulling that 1000 out of that custom, and tossing the 12 in there quick! For even more fun, pull the heads off the 1000 and fit them to the 1200.

Of course, this all depends on what your final goal is. As Eric said, you will run slightly higher RPMs with the 1000 vs any other year rear end.

[deathwing]

My #1 Goal this winter is to run a couple of double-barrel Weber carbs. Initially I was thinking I should only set it up with a 1000 or 1100 just because of the ease in setup.


I've always known that some of swapped 1000 heads onto 1200 motors, and that it works great. However, I never knew that some of the 1200's would fit in without modifying the frame.

Here's a pic of the 1200 I have laying around. (sorry, haven't actually taken any pictures OF the motor, I just know it was int he background of other photos I've taken). Unfortunately, it looks like its within the year range that the pulse generator sticks out on the back. (Please correct me if I'm wrong).


I did start doing some more research and digging to reconsider this option though. Because the end result sounds like what I would rather have. Heaps more power. And it just so happens that I have ANOTHER 1000 motor laying around as well. Here's a bit of the plan I'm thinking and tell me if you see any issues with it:
• Swap 1000 heads/cams/electronic ignition over to 1200 (currently running Dyna S on the bike above)
• Remove the pulse generator from the back of the 1200 and make a cover for it. I'm assuming there wouldn't be any issues since I'd be running ignition off of the Dyna S, which would be back on the left head/cam.
• Hopefully that would mean I wouldn't have to modify the frame.
• Having 1000 heads on there also means that I could just use Randakks intake manifolds built for using those double-barrel weber carbs.

If I remember correctly, there are some sort of exhaust/air vents that go from the motor to the carbs on a 1200 motor. Off the top of my head I don't know for sure what purpose they serve, and what I should do with them. My inclination would be to just close them up.

Thoughts?

[ericheath]

Going with 1000 heads you want have to worry about the exhaust or air vents. That was only on the 1200 heads. Most who have done the 1000 or 1100 heads on to the 1200 block have had two Notch the pistons. The intake valve is said to collide if you don't. However, EHE is in the middle of one right now, and he thinks that it maybe isn't necessary. I have forgotten the name of his built right now.

Mine is amateur hour but, you can see how I did mine here: http://www.ngwclub.com/forum/viewtopic.php?f=16&t=41192

[wingrider]

That 1200 you have there is an 84, and as such, has the electronics on the rear of the engine. With the work you have done, perhaps you wouldn't need to get rid of it like those of us with a stock 1000 frame. Tough to tell if you have the stock crossmember in there.

The way you are heading is exactly what I did to run my dual Webers...they fit nice on the 1200 block now! Now, if you toss in some NOS, you are just copying me!