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Discussion Starter · #1 ·
i need to know if these two motors are the same, i am trying to build a drag sled i have a 75 sno-jet sst 440 f/a picks to follow. i cant find a kimpex part number for the sled that i have, and that is why i need to know if the gpx motor is the same as the 440 f/a in my sno-jet. pluss if any one has a set of srx pipes with stingers for sale i am intrested pm if u got. any info would be great
 

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The GPX and SST f/a both used the free air 440 Yamaha (65 hp). I do not know if there were any minor variations in carburation or exhaust between the two but the base engine was the sx440 Yamaha. Hope this helps.
 

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Discussion Starter · #3 ·
so when i go to but a compleat gasket kit i should order what kit for what sled i cant find a gasket kit for a 75 sno-jet 440 f/a at my local yahama dealer. so a 75 sx 440 is the same kit at my 75 sno-jet right?
 

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It should be identical. A Yamaha dealer will not list Sno-Jet parts. You can get these through aftermarket like Dennis Kirk too. The 74-75 GPX 433 parts would be the ones. Also, there is a website called sno-jet.com it has a link to a picture of the engine used in the SST f/a. It is identical to the GPX. I used to have a 75 GPX.

Here is the link -- look at the picture on the bottom

http://www.snojet.com/restopage.html
 

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I own 4 1975 SST F/A s. The only big difference I've noticed is the GPX has oil injection, Sno*Jet doesn't. Sno*Jet runs a single tuned exhaust, GPX has twin pipes. Sno*Jet runs Mikuni carbs. :cn:
 
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