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15) Wear limits for ROTAX 914 F
Designation
Cylinder/Piston
cylinder bore Cyl. 1 ............................... 79,50 ÷ 79,524
ovality ..................................................... 0,000 ÷ 0,007
conicity ................................................... 0,000 ÷ 0,030
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515
piston to cylinder clearance .................... 0,000 ÷ 0,020
cylinder bore Cyl. 2 ............................... 79,50 ÷ 79,524
ovality ..................................................... 0,000 ÷ 0,007
conicity ................................................... 0,000 ÷ 0,030
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515
piston to cylinder clearance .................... 0,000 ÷ 0,020
cylinder bore Cyl. 3 ............................... 79,50 ÷ 79,524
ovality ..................................................... 0,000 ÷ 0,007
conicity ................................................... 0,000 ÷ 0,030
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515
piston to cylinder clearance .................... 0,000 ÷ 0,020
cylinder bore Cyl. 4 ............................... 79,50 ÷ 79,524
ovality ..................................................... 0,000 ÷ 0,007
conicity ................................................... 0,000 ÷ 0,030
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515
piston to cylinder clearance .................... 0,000 ÷ 0,020
piston pin bore Cyl. 1 ............................ 20,001 ÷ 20,005
piston pin .............................................. 19,992 ÷ 19,995
clearance, pin in piston ........................... 0,006 ÷ 0,013
con-rod bore, small end ........................ 20,010 ÷ 20,020
clearance, pin in con-rod ......................... 0,015 ÷ 0,028
piston pin bore Cyl. 2 ............................ 20,001 ÷ 20,005
piston pin .............................................. 19,992 ÷ 19,995
clearance, pin in piston ........................... 0,006 ÷ 0,013
con-rod bore, small end ........................ 20,010 ÷ 20,020
clearance, pin in con-rod ......................... 0,015 ÷ 0,028
piston pin bore Cyl. 3 ............................ 20,001 ÷ 20,005
piston pin .............................................. 19,992 ÷ 19,995
clearance, pin in piston ........................... 0,006 ÷ 0,013
con-rod bore, small end ........................ 20,010 ÷ 20,020
clearance, pin in con-rod ......................... 0,015 ÷ 0,028
piston pin bore Cyl. 4 ............................ 20,001 ÷ 20,005
piston pin .............................................. 19,992 ÷ 19,995
clearance, pin in piston ........................... 0,006 ÷ 0,013
con-rod bore, small end ........................ 20,010 ÷ 20,020
clearance, pin in con-rod ......................... 0,015 ÷ 0,028
Piston rings, Cyl.1
st
1
compression ring
height of groove ...................................... 1,52 ÷ 1,54
height of ring ........................................... 1,478 ÷ 1,49
ring / groove clearance ........................... 0,03 ÷ 0,062
ring end gap F ....................................... 0,15 ÷ 0,35
Modification no.
- 0 -
new
mm
(in.)
(3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
(0,000÷ 0,0003) ........... 0,05 (0,002) ........................
(0,000÷ 0,001) ............ 0,06 (0,002) ........................
(3,130÷ 3,131) .......... 79,39 (3,126) ........................
(0,000÷0,0008) ............ 0,13 (0,005) ........................
(3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
(0,000÷ 0,0003) ........... 0,05 (0,002) ........................
(0,000÷ 0,001) ............ 0,06 (0,002) ........................
(3,130÷ 3,131) .......... 79,39 (3,126) ........................
(0,000÷0,0008) ............ 0,13 (0,005) ........................
(3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
(0,000÷ 0,0003) ........... 0,05 (0,002) ........................
(0,000÷ 0,001) ............ 0,06 (0,002) ........................
(3,130÷ 3,131) .......... 79,39 (3,126) ........................
(0,000÷0,0008) ............ 0,13 (0,005) ........................
(3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
(0,000÷ 0,0003) ........... 0,05 (0,002) ........................
(0,000÷ 0,001) ............ 0,06 (0,002) ........................
(3,130÷ 3,131) .......... 79,39 (3,126) ........................
(0,000÷0,0008) ............ 0,13 (0,005) ........................
(0,7874÷0,7876) ........ 20,04 (0,789) ........................
(0,7870÷0,7872) ........ 19,97 (0,786) ........................
(0,0002÷0,0005) .......... 0,05 (0,002) ........................
(0,787÷ 0,788) .......... 20,04 (0,789) ........................
(0,0006÷0,001) ............ 0,05 (0,002) ........................
(0,7874÷0,7876) ........ 20,04 (0,789) ........................
(0,7870÷0,7872) ........ 19,97 (0,786) ........................
(0,0002÷0,0005) .......... 0,05 (0,002) ........................
(0,787÷ 0,788) .......... 20,04 (0,789) ........................
(0,0006÷0,001) ............ 0,05 (0,002) ........................
(0,7874÷0,7876) ........ 20,04 (0,789) ........................
(0,7870÷0,7872) ........ 19,97 (0,786) ........................
(0,0002÷0,0005) .......... 0,05 (0,002) ........................
(0,787÷ 0,788) .......... 20,04 (0,789) ........................
(0,0006÷0,001) ............ 0,05 (0,002) ........................
(0,7874÷0,7876) ........ 20,04 (0,789) ........................
(0,7870÷0,7872) ........ 19,97 (0,786) ........................
(0,0002÷0,0005) .......... 0,05 (0,002) ........................
(0,787÷ 0,788) .......... 20,04 (0,789) ........................
(0,0006÷0,001) ............ 0,05 (0,002) ........................
(0,059÷0,061) .............. 1,6
(0,058÷0,059) .............. 1,45 (0,057) ........................
(0,001÷0,002) .............. 0,1
(0,006÷0,014) .............. 1,0
Reference
wear limit
actual dim.
mm
(in.)
int. / exh.
(0,063) ........................
(0,004) ........................
(0,04) ..........................
Main
Date
1997 02 01
914 F
Page
261
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