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Old 07-30-2010, 08:44 PM   #1168
Pablo83
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Joined: Aug 2008
Location: Woodland Park, CO
Oddometer: 4,800
General information on worldwide model year changes to the NX650

Originally posted by Switch on www.xrv.org.uk

CHARACTERISTICS OF EACH "GENERATION" (specifications similar to previous years, unless specifically mentioned as a change):

1. 1st generation / version 1 (also made for US) - 1988

RD02 designation
type 1 fairing + seat
turn signals external from fairings
golden rims
square-base end cans with golden caps
long carb 'neck' (intake manifold)
13L fuel tank
Nissin front (disk) brakes
drum rear brakes
front sprocket countershaft with 7 teeth
kick-starter
'short' pro-link rear shock
rectifier mounter on the back of the airbox
fuse box with 3 fuses + 1 or 2 diodes (unsure where they switched over - perhaps the one with a single diode doesn't have a sidestand cutoff switch?)

2. 1st generation / version 2 (european) - 1988 -> 1989

disk rear brakes (Nissin)

3. 1st generation / version 3 - 1990 - 1991

removed kickstarter (can still be added with some work)
front sprocket countershaft with 14 teeth

4. 2nd generation / version 1 - 1992 -> 1994

type 2 fairing + seat
removed possibility of adding kickstarter (modified engine block)
turn signals integrated into front fairings
turn relay now has 3 terminals (extra terminal connected to ground)
16L fuel tank w/3 mount points for each front fairing
fuse box with 4 fuses and no diodes

5. 2nd generation / version 2 - 1995

RD08 designation (VIN starting with ZDCRD08...)
front right footpeg mounting changed
round end-cans with silver caps
short intake manifold
"long" pro-link rear shock (actually frame mount 1 inch higher)
redesigned airbox (same air filter though)
repositioned rectifier from rear of airbox to under the luggage rack (also longer wires on rectifier)

6. 3rd generation / version 1 - 1996 - 1997(some)

type 3 fairing (seat compatible with type 2)
silver rims
turn signals external from fairings
16L fuel tank w/2 mount points for each front fairing and slightly offset bottom mounts

7. 3rd generation / version 2 - 1997 -> 2003

Brembo brakes



EXTRA THINGS THAT WERE CHANGED:

ALL YEARS: seat height - the claimed seat height varies wildly between 82cm and 89cm; I don't have exact info
ALL YEARS: Honda tuned the carb settings a LOT, based on year and country of export; main jets vary from 140 to 160 (all valid stock sizes). Idle jet is 50-55 all the time, I believe. Air screw settings are a mess.
LATE YEARS: Honda apparently messed with the camshaft or valvetrain; the is a POSSIBILITY that newer than 1997 bikes need 0.10mm of exhaust valve lash instead of the 'standard' 0.12mm; this is UNCONFIRMED
LATE YEARS: somewhere along the way, the crank sensor was changed from single-pickup single-sensor to a multi-pickup single sensor setup; result is that new and old ignitions don't quite match; bike might run but will show wrong RPM; use at your own risk or ask beforehand
EARLY YEARS: it's unclear to me what Honda did to the rear shock mount on early models; I've seen three frames (91, 90, 96) that have different rear shock mount height, measured directly against the lower lip of the headstock



Things NOT related solely to production year:
parking lock (locked handlebar with position lights on) -- this is specific to Austria, I believe
smog pump (externally mounted on the left side of the cylinder) -- no idea on specifics here - US California has it, but also some EU bikes
luggage racks
speedometer markings (km/h, mph) -- related to US/UK models, likely
front headlight protector -- must've been an optional for 1st generation models, either OEM or aftermaket
sidestand switch, either as a simple warning light or as an engine cutoff (1st generation only, but unsure of years/coutnry - later models include the full package: warning light + engine cutoff)

Pablo83 screwed with this post 08-10-2011 at 08:21 AM
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