What is the difference between the 1981 Trailfire 340 and 440 air box restrictors? What is the ID measurement on each?
Part number are M68186 for the 340 and M68187 for the 440.

With this question answered... My father has asked me to find him a correct ski. I believe the part number is AM 54912.
We would consider purchasing one if the price is reasonable. Please let me know if you have one.
I will post this in the classified section also. Thank you.

Remember that this picture is taken with the sled half disassembled. The wires were run in the position you see above. We have repaired the wires and have put heat shrink tubing on the wire loom. It is all ready to lay back in its proper place and route through the J hooks in pan and hood. Thanks fo...

We will replace the green tube. The electrical wires are just sitting there for now since the sled is mostly disassembled. We will lay the wires in the correct spot when we put it back together. Thanks for the comments guys.

Click on the pictures above to see the loops.

What is the proper route for the fuel line on a 1981 Trailfire? Here is a picture of our current restoration project. We have the blue fuel line routed through a out of the fuel pupm through a clip, underneath the steering column and motor mount plate, and up around to where it will connect to the c...

My father has a 1981 Trailfire 340 he is restoring and it has two different skis on it. Can anyone tell me which of the two skis in the picture (if any) is the correct ski for the sled? I believe it is the one with a squared rear end on the bottom of the pictures. The one on top I believe is a Denni...

1981 Trailfire J34FK 155022M
Build Date 06/80
Restored 2010
Paul D. Tate
Roy, UT
Owned since March 2009
History: WSVSA charity raffle sled in 2008

The sleds fired up today. My dad had a JD tech manual which shows the additional fuel pump can be used. Our problems was air leaking in the top of the pickup line in the gas tank. The clamp was not on tight and air was getting in the intake line. It is running great. For information on the vintage r...

OK. This set up is the way we found it.
It does look wierd and we will remove the separate fuel pump and plug off one of the impulse lines. I guess one impulse line was added when the original owner added the separate filter. Thanks for the comments.

My father and I have restored two JD sleds and will be taking them to West Yellowstone, MT in March for the 3rd Annual Vintage Round-Up. We have filled the tanks with 40:1 mixed gas, pressurized the tank a little and have been able to pull gas up to the carbs. It appears, however, that the engine wa...