670 Rotary Valve [Archive] - Snowmobile World : Your #1 Snowmobile Forum

madsledhead

11-01-2003, 02:44 PM

Hi,

Could anybody with a manual tell me the RV timing specs for a 1993 mach 1 670.

Thanks

Russ Wheeler

11-01-2003, 03:01 PM

My clymer reads for a 93 670...
opening BTDC 146
closing ATDC 75

madsledhead

11-01-2003, 07:20 PM

Hey thanks, Thats great!

oldyeller

11-02-2003, 01:22 AM

They must have changed the specs for 1994.My manual reads 144-72.

Russ Wheeler

11-02-2003, 12:20 PM

Yup, manual says that 94 and 95 are 144-72...

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