Modification; Manifold; Piston; Exhaust Pipe & Muffler - Yamaha RD250 Manual
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Also See for RD250:
- Owner's manual (165 pages) ,
- Supplementary service manual (55 pages) ,
- Owner's manual (163 pages)
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MODIFICATION
C
tntet
port
@
Exhaust
port
@
Scauenging
ports
(Transfer)
REMARKS
Due
to
change
of
inlet
port timing
Better engine
perf
ormance
ru
5.
MANIFOLD (For RD400
ON
LY)
For better
engine performance,
both right
and
left
manifolds
are
provided
with
balance
pipe.
t
t
t
7
have
been
t
PORT
TIMING
(MM)
77 MODEL
,78 MODEL
A
33.5
<_
B
395
41
5
c
640
68.5
nn
oo
trN
ocn
oo
ffiffi.)
PISTON (For RD400 ONLY)
Change
in
shape
EXHAUST PIPE
&
MUFFLER
Both
inside diameter and
volume
changed.
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