99 Ski-Doo SummitX 670 - Snowmobile Forum: Your #1 Snowmobile Forum

theonethatiam · 11-05-2009, 02:01 AM

Got a 99 Ski-Doo SummitX 670 really cheap because the guy who owned it before pulled the shaft with the rotary valve to replace the brass gear on it. The new gear is a high performance model and it is longer than oem by about 1/2 in. My question is do I need a different spring. I don't know the technical part name but it goes over the shaft and presses everything together. Do I need a shorter spring and what effect will the longer gear have on the engine?

Thanks in advance.

theonethatiam · 11-08-2009, 02:23 PM

Nothing? C'mon guys. I just need to know if I need a different spring.

**smallengineguy** · 11-08-2009, 08:42 PM

OnlineMicrofiche Index will show you pics of the part you need.Let us know which one it is.

theonethatiam · 11-09-2009, 05:49 PM

This site did not have my sled listed. Found a picture at Babbitts. The gear being replaced is #20 and the spring is #21. The gear we have is supposed to be slightly larger than stock (about 1/2" longer). I need to know if I need a different spring (21) or if I was lied to about the gear.

Could not post a pic or hyperlink that worked so...
Babbittsonline.com -> OEM Parts -> OEM Part Diagrams Look Up by Model Fit -> Ski-Doo -> Ski-doo -> 1999 -> Summit -> Summit 500/X 670, 1999.

This should bring up diagrams for the sled. Choose Crank Case, Rotary Valve, Water Pump out of the drop-down menu and you will see what I need.

Hope all of that made sence.