I am in the process of extending my 03 RX-1 to 136" I really like the rail extensions from Tracks USA but I can't seem to find JUST a tunnel extension anywhere. Tracks USA doesn't offer RX-1 tunnel extensions and I don't really care for the rail extensions that come with kits from Hartman or MPI (although I like the looks of the Hartman tunnel extension) Can anybody help me out here, I need to know where I can just buy a tunnel extension. Thanks! 
POWERHAULIC
VIP Member
I prefer the extension from MPI, and they will sell it seperate last I checked.
I have used the Yamaha & Ski-Doo rail extensions from Tracks USA they are very nice pieces.
I have used the Yamaha & Ski-Doo rail extensions from Tracks USA they are very nice pieces.
Buckeye
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I also have the Tracks USA rail extensions and they are the best. I went with the Yamaha OEM tunnel extension. It's a perfect fit.
Mpi does seperate the rail extensions from the tunnel kits
OK, thanks guys! 
Focker
Pro
Hey Master, did you end up picking up a RX at the auction?
Bid on two at the auction and got outbid on both, stopped by and checked one out in Lansing and bought it on the spot. 2000 miles in great shape for $5000 with a roller secondary. I fell in love with the extension when I saw your sled so I got the stuff on the way and bought a 136 Ripsaw at Novi 
Indy
TY 4 Stroke God
I bought an OEM from a warrior. I think he may have one left, here is the link:
http://www.rx1.info/viewtopic.php?t=456 ... extentions
http://www.rx1.info/viewtopic.php?t=456 ... extentions
Focker
Pro
Glad to hear you got a good deal and that you admired my sled! The 136 is definately the way to go, you wont be dissappointed! I decided to put a new skid underneath mine so she'll ride a little better! Let me know if there is any way I can help with the 136 installation! 
Dave
Dave
