1999 Ski-Doo Factory Shop Manual Volume Two, Page 114Get this manual
Section 04 ENGINE Subsection 03 (494, 583 AND 670 ENGINE TYPES)
ASSEMBLY
MX 670 and Summit 670 Only When installing new cageless bearing, replace half plastic cages by sleeveNOTE: 670 engine cageless bearing has 28 needlesA01C01A
1Exhaust
Install shouldered sleeve
A02C2GA
TYPICAL 1Sleeve
Grease thrust washers and install them on each end of needlesInsert cageless bearing into connecting rod