Ninja EX500 carbs on an XS650?

[Highside]

Without looking into this, I was thinking that this might be a good idea.

Has anyone tried this, or am I just high on low-grade crack cocaine (again)??

 

[jamesgs4]

why not? 500 is pretty close to 650, so minor jetting is all that I could think of.

 

[jayel]

not much point in it still a CV carb

 

[Highside]

not much point in it still a CV carb

Yes, but is has to be better than the CV38's I've got now.

 

[jedi_]

do they use the same measurements for air filter and intake manifold?

 

[jamesgs4]

as an upgrade over the 38's? prob lose some performance with the smaller carbs.

 

[Highside]

as an upgrade over the 38's? prob lose some performance with the smaller carbs.

The Ninja makes 60 HP with 'em with no prob.

 

[jamesgs4]

60 hp? wow. learn something new every day

 

[jamesgs4]

Aren't the 38's supposed to be the best stock xs carbs? I have the 80's bs 34s, and they are supposed to suck worse.
edit: mine work great.

 

[weekendrider]

Is it a flat slided carb? Would the slide be lighter/quicker?

 

[Ghetto]

There is nothing wrong with 34's. So easy to get them running good even a caveman can do it.

 

[jay760]

GPZ 500 carbs are supposed to fit straight on, heard of this done quite a few times.

 

[grizld1]

XS650 intake distance is 120 mm. center-to-center, and I know of no bike carbs, twin or 4-banger, with spacing that's compatible; fabrication required. Modern flat slide vacuum carbs like those fitted to the EX500 twin would do much to quicken throttle response on the XS650 and would likely flow better as well, but in addition to fabrication you'd need to know how to tune. Don't expect massive power gains from a change of carbies.

 

[Darkdruid]

GPZ 500 carbs are supposed to fit straight on, heard of this done quite a few times.

I have heard this as well and spoken to an owner who had done it with minimal fuss.

 

[Tz250racer]

Make 50 hp on the wheel.Most magazines got that figure on the dyno.Definately way faster then the Xs.I am lucky enough to have both track ready.Yes the kehins do fit but the carb spigot groove is off.Carbs on the Ex are much lighter.I got TM34 flats on the Xs and I never I the need to go with the Ex carbs.

 

[terry l hendren]

so has anybody done an artical on fitting tm 34 mikuni on xs650s

 

[XS1961]

Ive had ER500 (more or less same as GPZ500)carbs on an XS,straight fit onto the XS rubbers..Had to f*** about with the jetting & slide but way better than the stock XS CV's.

 

[Highside]

bump.

I thought i made this thread.

I got a set off of ebay for cheap and I'm going to try them out.

First thing I notice is that they weigh half what the stock CV 38's do.

I'll save 3 lbs just by switching to these carbs.

 

[Wizard of Smiles]

Did you get any where w/ these?

 

[56nomad]

Have you made any progress, Highside? Really ready for an update on this.