The Honda Owners Club

Hi,
I have had a post about making my xr125 faster, so I am finally accepting that its never going to be a cbr1000 I have decided to try and change to a K&N air filter (model RC-2290), the kind people at K&N also informed me that if I put this onto my bike I would need to rejet the carb, so I was wondering how I would go about this and where I would get the parts (I live inw arrington if you know any local shops).
Thanks

I presume it's a Keihin carb on the XR.

You can try http://www.allensperformance.co.uk/ . They are in Nottinghamshire, I use them for all my Keihin jetting requirements.

Regards

Chimpy

Yeah its a keihin carb
Under the logo it had KTB then fither down M2 WO OS (i think, it was dark)
So what jet would I need, its a bit confusing....
Thanks

You will have to remove the float bowl and remove the main jet. You will need to check the size that's stamped on it. It will be something like 95 or 100. Get jets one and two sizes up from whatever it is, the guys at Allens will be able to advise.

Regards

Chimpy

It says 95 on the main jet so which size would I need because that site isn't getting back to me.
Thanks

OK, try 98 and 100 main jets. I'd start with the 100 and take the bike for a blast down the dual carriageway flat out at 62MPH. When you near a lay by hit the kill switch, pull the clutch in and coast to a halt. Have a look at the spark plug, it should be a nice greyish light brown colour. If it's sooty try the 98 jet and repeat the process.

Regards

Chimpy

Hi,
Whate model jet would I need because that site doesn't seem to know....
If it helps im on an 04 XR125
All I could see on the carb was Keihin KTB.
Thanks

Edit: are there any other carb shops online in the uk?

You'll need to talk to them, I've always found them pretty helpfull. I don't know of any other places that have such extensive stocks of Keihin parts.

Regards

Chimpy

Well after a while they they told me they dont sell them (not too helpful to behonest)
Anywhere else that sells the carb jets, I have the images if they will help.....
Thanks

could you recomend any performace carbs for this bike as I am having too much trouble trying to get a jet.....
Thanks

If you change the carb for something else, it will also require correctly setting up (jetting).

It might be worth you taking your bike to a rolling road and let them sort the jetting out for you.

Regards

Chimpy