SRX600 Keihin CR33 jetting -SteveH

[andy230]

And for other anoraks like us who are interested!

On a 620 motor, I am running:

Slide: 30
Needle: YY8
Clip: 3

The above are from my paperwork which I got with the bike (from the guy before the chap I bought it from).  As such, these are "unconfirmed", ie. they could have been changed and the book not updated. But I dont think so- although I haven't touched any of the above to check/make my own notes.

Mains were 118s with an airbox, with an "opened out" lid, but no filter.  It was dyno'd with these last year, and deemed to be very slightly lean but probably ok.  For the trip to france, I put a K&N panel filter into the airbox and didn't jet up, it was a little rich, but fine for the road.

Removing the airbox completely I went to 125's, and it was a bit lean.

130s sorted it out.

135 running last sunday were a little rich, with evidence of a little black smoke I am told.

I will go back to 130s.

Hope this is of use?

andy

[Steve H]

Do you know what the 'slow' jet is ?. Its the tall brass post in front of the main jet ?

[andy230]

Sorry steve, can't help.

Have you seen these?  May explain:

http://www.sudco.com/cr_diagram.html
http://www.sudco.com/crpart.html
http://www.sudco.com/cr.html


First two may be of more use.  Cheers

a

[Steve H]

I was after the size, sorry didnt make my posting very clear. Not to worry

[andy230]

I was after the size, sorry didnt make my posting very clear. Not to worry

Ah!  No, sorry, I'm not sure.  I think I'll need to into the carbs for that.  That means removal (main jets can be changed in-situ), which is a bit sore on the inlet rubbers (already wrecked a good un!).

But when I do go guddling around I'll let you know (and if you cant sort it I can go in!)

Cheers,

a

[bikeseamus]

Andy
         You might soak the inlet rubbers (neoprenes?) for 24 hours in Automatic Transmission Fluid. It restores their flexibility a bit and extends their life.  That is also true for any carb diaphragm that raises the slide. Works wonders for them and adds many years to their lives. (I guess they have lives... they sure do add to mine, in any case)
   That's an old Arizona Desert restoration trick I learned on my last Cowboy hunt... I didn't find any cowboys to shoot, but at least I picked up on that carb trick.  All the cowboys were hiding behind Bushes in Texas.            yarf yarf yuarf.