RHC modified CRF owners jetting question

[MXFred]

This is anyone that has the RHC full up mods (head porting, cam, piston and valves).

What jetting are you running:

Elevation?

Temperature?

Need clip position?

Main Jet size ?

Pilot jet size ?

Fuel screw set at ?

Thanks,

Fred

[Wayward Son]

what pipe?what is your elevation?year of bike?

[armourbl]

Fred,

Your bike felt fine to me. If it were off anywhere I'd say it was in the pilot circuit, but even then, maybe only off by one step.

What are you experiencing with the bike that is making you question jetting?

One of the simplest things you can change at the track to see if it makes an improvement is the clip on the needle. Move it up one clip and ride the bike, if it is better you were right. If not, move it one clip below the original spot. If neither makes an improvement, put it back to the orginal position. Then work on another part of the circuit.

ben

[MXFred]

DMC afterburner pipe on an 05, 1,100 feet above sea level.

The temp has been around in the 70's in the early morning raising up to 90's in the afternoon. today was 102.

[MXFred]

Fred,

Your bike felt fine to me. If it were off anywhere I'd say it was in the pilot circuit, but even then, maybe only off by one step.

What are you experiencing with the bike that is making you question jetting?

One of the simplest things you can change at the track to see if it makes an improvement is the clip on the needle. Move it up one clip and ride the bike, if it is better you were right. If not, move it one clip below the original spot. If neither makes an improvement, put it back to the orginal position. Then work on another part of the circuit.

ben

Just seeing what others are running. took out the JD and ran the stock needle and it seemed to like it better. Have heard of people running 06's needles as well. Just curious to see if anyone is running anything different.

It's a monster but I'm always looking for the optimum.

[armourbl]

I like the stock needle better than JD kit too.

ben

[Wayward Son]

go from the stock 165 main jet to a 160.

otheriwse,the stock 05 jetting works well.

[AnotherRedHead]

i have 06 450r RHC head cam piston, 163 main, pilot im not sure i think 1-3/4 turns dont quote me, stock jets everywhere else, and needle on the 5th clip. I moved the needle up per the whitebros exh instructions, and just left it in there, moved up to 163 main and ult 4 gas when I put the RHC stuff in. I havent checked it on the dyno, but she runs awesome, no flat spots or sputters. Still on same plug since I put RHC stuff in prob 10-15hrs ago.

[davbrucas]

Rapture ran a 158 main with his RHC 450.