450r jets

[foreman 450]

What are the stock jets in a 450r?

[d3ktrix]

04/05 118MJ 48Pilot
06+ 120MJ 45Pilot

[foreman 450]

I have a yoshimura rs7 header and muffler for the 450r what size

jets should i put in it when i put it on?

[d3ktrix]

What year is ur bike?
Any other mods?

[foreman 450]

Its a 08 and it doest have any other mods

[represent618]

This could be a good thread, I would love to hear who is running what jetting.

I have a stock exaust just removed the sparkarrestor and want to jet mine but never got around to it.

07 450R. I think I can go with a 150 main/needle and a 55 pilot? Any suggestions from experience? It is too lean from the factory without doubt.

[Pacheco_450r]

With my motoworks exhaust, airbox lid removed and a K&N I have a 185 main and adjusted my stock pilot, it runs pretty well like that.

Bike is a 05 450r

[d3ktrix]

Originally posted by Pacheco_450r
With my motoworks exhaust, airbox lid removed and a K&N I have a 185 main and adjusted my stock pilot, it runs pretty well like that.

Bike is a 05 450r

04/05 jetting is totally different then 06+ jetting with the FCR carbs.

For an 08 with an exhuast and air box lid removed the HRC jetting will be fine.

You can just pick up a Honda HRC jet kit if you want or buy individual jets.

165MJ
#50 Leak jet
HRC needle (not required but helps power)

Turn the A/F screw to 2.5 turns out then tune from there.
Depending on the exhaust you MIGHT need to up to a 48 pilot.

If you don't install the leak jet you will have a bad bog when u snap the throttle

These are just the basic starting point jets that are recommended most of the time, you might have to tune further based on how it runs.

[d3ktrix]

Originally posted by represent618
07 450R. I think I can go with a 150 main/needle and a 55 pilot? Any suggestions from experience? It is too lean from the factory without doubt.

If your removing the air box lid follow the jetting I recommended above.