I just picked up a '79 IT400 motor today. The motor is in a '77 YZ400 chassis. I have ben looking for one of these motors for quite a while now. I am going to pull the motor out of the bike soon to go over it. I am planning on putting this motor in my spare blaster rolling chassis. Any tips or suggestions appreciated.
Picked up a '79 IT400 motor!
- Thread starter 1Badnotch
- Start date
Pics.pics, pics!!! we like pics 
.. We want to see pics of that bad boy... One concern you may want to focus on first is how the pipe will fit and or you will/can modify an existing pipe or if one will need to be made specificaly.. ,,, Good luck on the build. i am looking frwrd to a big displacement 2 stroke motor into a Blaster frame..
.. We want to see pics of that bad boy... One concern you may want to focus on first is how the pipe will fit and or you will/can modify an existing pipe or if one will need to be made specificaly.. ,,, Good luck on the build. i am looking frwrd to a big displacement 2 stroke motor into a Blaster frame..
Nice strong air cooled motor, should be sweet, you might want to consider damped mounts where possible. I don't know from experience but have heard that motor vibes can be bad enough to make long rides tough
I have seen urethane bushings, (think sway bar endlink) used when putting sled motors into cart or buggy chasis.
I have seen urethane bushings, (think sway bar endlink) used when putting sled motors into cart or buggy chasis.
I will get some pics soon. I have heard that the motor mounts have to be pretty substantial for this motor. I have to get the motor out of the bike and set into the blaster chassis. Then I can get a good plan for mounting it. I have wanted one of these big 2 strokes in a blaster ever since I saw Paulie B's. That is a sweet machine!
I made a little progress today. I got the IT400 motor pulled from the bike. I also pulled the head to see what bore it is on. It has .25 stamped on the top of the piston,so it is on it's 1st overbore. It needs a bore job to freshen it up. I believe that you can still get .50 or 2nd overbore pistons. So I should be ok.
I am jealous, I have been dreaming and drooling over the idea of putting a semi-late model 500 cc motor in one, but since I moved a few years back and left all my contacts and tools back in Wv, the cost and complication of getting the big pieces and fab work done are a but much right now.
But the air cooled IT400 is a much better idea than a water cooled 500, simpler to do and likey to have a better matched gearbox.
Good thing you are able to find parts for it.
But the air cooled IT400 is a much better idea than a water cooled 500, simpler to do and likey to have a better matched gearbox.
Good thing you are able to find parts for it.
