Ninja EX500 carbs on an XS650?

ippytattoo

Just another grumpy old hack.
Messages
1,200
Reaction score
150
Points
63
Location
La Pine OR, USA
56nomad I have successfuly transplanted a set of EX500 carbs to my '81. I have documented my trials and tribulations of the swap in my build thread here starting at post 63
 

XS1961

XS addict!
Messages
740
Reaction score
58
Points
28
Location
England
Nice write up ippytattoo.
I wondered at first where you were going with leaning of the main jets as I had to richen up two sizes immediately to get it to run beyond 1/4 throttle..
Afraid I got bored adjusting mine last month & installed my spare VM34's as I was running out of summer!
I'll wait til autumn to sort mine, maybe youll have it cracked by then & save me a lot of time! :)
 

ippytattoo

Just another grumpy old hack.
Messages
1,200
Reaction score
150
Points
63
Location
La Pine OR, USA
I have them all tuned and running well. I have put about 150 miles on them now since the last adjustments which were #38 pilots, #145 mains, 1 shim (1/2 mm) under the needles and the mixture screws at 1 1/2 turns from seated. My plugs after 150 miles of varied riding are a nice light tan/grey color with a small smoke ring about 2/3 up the porcelain. Hope the info helps those out who are looking at doing the same swap.
 

XS1961

XS addict!
Messages
740
Reaction score
58
Points
28
Location
England
Excellent, thanks for the update:thumbsup:
I might try agan next weekend.
..Dont suppose you have a photo of your choke setup by any chance? :wink2:
 

XS1961

XS addict!
Messages
740
Reaction score
58
Points
28
Location
England
Heres my idea today...Ball spring loaded ball-bearing which locates in drilled holes in the sliding choke bar
xsaugust2012008.jpg
 

ippytattoo

Just another grumpy old hack.
Messages
1,200
Reaction score
150
Points
63
Location
La Pine OR, USA
Heres my idea today...Ball spring loaded ball-bearing which locates in drilled holes in the sliding choke bar
xsaugust2012008.jpg

That is exactly what I did. It is really easy to reach down on the right hand side and push the choke actuator over and kick it over. Once it starts you just gradually move the choke actuator back to the off position.
 

XS1961

XS addict!
Messages
740
Reaction score
58
Points
28
Location
England
I have 3 types here, internals look the same but theres a few differences externally on mine, fuel pipe feed/inlet , carb vent , idle knob etc.
We have the GPZ500 & the ER-5 , same engine but the GPZ is the 'sporty' version , jettings a lot bigger/richer

That is exactly what I did. It is really easy to reach down on the right hand side and push the choke actuator over and kick it over. Once it starts you just gradually move the choke actuator back to the off position.
Great minds thinking alike eh?:wink2:
 

56nomad

XS650 Enthusiast
Messages
90
Reaction score
6
Points
8
Location
Staffordshire, UK
56nomad I have successfuly transplanted a set of EX500 carbs to my '81. I have documented my trials and tribulations of the swap in my build thread here starting at post 63

Thanks for this and all other responses. It's certainly got me enthusiastic enough to try it for myself so I've bought a pair off a 1994 GPZ500S that were on ebay. Prepare yourselves for "how did you ..." questions! :D
 

XS1961

XS addict!
Messages
740
Reaction score
58
Points
28
Location
England
Fitted mine today. Started first kick, idles nicely. Very light throttle:thumbsup:
Heres my Youtube vid.
 

56nomad

XS650 Enthusiast
Messages
90
Reaction score
6
Points
8
Location
Staffordshire, UK
Fitted mine today. Started first kick, idles nicely. Very light throttle:thumbsup:
Heres my Youtube vid.

Cool! Nice one. Any tips for a fellow English man or do the posts above cover it all? How is your bike configured - pods and exhaust? Assuming that you've still got to check the jetting through the rev range please keep me informed as to what settings you end up with as mine will probably be requiring similar.

Cheers

Ian
 

XS1961

XS addict!
Messages
740
Reaction score
58
Points
28
Location
England
I'll start the road testing later in the week but starting & idle are absolutely spot on, no pops or farts, & it feels very responsive to throttle .
BSA A65 silencers ,Halco 1.5 downpipes ,Ramair filters.
So far..140 main jets.
Modified a spare XS cable.
 
Top