JIMS Box 2 1208-1352 (all models of 120, 131, or 135 Alpha, Beta and Evo Mount Engines) User Manual
Page 19
555 Dawson Drive, Camarillo, CA 93012 Phone 805-482-6913 • Fax 805-482-7422
18
Rev I
8-12
No.1208-1352
A Division of Thiessen Products, INC
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Instruction Appendices
Appendix One
Piston Ring Burr Removal:
Remove any burrs with a fine jeweler’s file.
NOTES: Do this work away from the engine assembly.
• Piston ring filings are extremely hard and dangerous to the fine internal surfaces of your 120,
131 or 135 engine, especially its roller and needle bearings.
• Piston ring filings are often slightly magnetic and may be difficult to remove from the rings or
steel tools, like the jeweler’s file you might use to adjust end gap.
• Piston ring end gap filing creates very sharp corners on the rings. These must be removed before
inserting the rings into the cylinder bores.
• It is not necessary or desirable to bevel or break the corners of a modified piston ring. Merely
remove the burrs
3
5
BETA
135 &
135 &
120”, 131” & 135”
131” & 135”
& 135”
135”
2208-1611 FRT. BLK
2208-1612 REAR BLK
2208-1621 FRT. SILVER
2208-1622 REAR SILVER
Fig.73