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yzfmerf

Restarting a hot bike

12 posts in this topic

I am getting really frustrated with my 06'. I have re jetted to 48/170 like i have heard a lot of people mention and added a fuel screw. I have it about three turns out and it still pops. Is the fact it is to lean the reason why it wont start once it gets hot. Although i have had the bike for a while now i want to get a better understanding of how it works. I don't have that feeling right now.

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Too lean will not make it hard to start when hot. Your jetting isn't too lean.

Checked the valves lately?

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Stupid in full mode here. When i looked at the bike again choke was still on! In any case i thought of something else though. I put a Procircuit header pipe on not that long ago but kept the stock silencer. Would that affect the jetting or does it have to do more with the silencer. I have not been able to ride much and the last time i rode and had the problems restarting it as probably to hot for the 48/170 i have in there now and with here i had the fuel screw.

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Stupid in full mode here. When i looked at the bike again choke was still on! In any case i thought of something else though. I put a Procircuit header pipe on not that long ago but kept the stock silencer. Would that affect the jetting or does it have to do more with the silencer. I have not been able to ride much and the last time i rode and had the problems restarting it as probably to hot for the 48/170 i have in there now and with here i had the fuel screw.

I believe 48/170 and 3 turns is too rich. I would use a 45/165 and 2 1/4 turns. That is what i run in my 06 with the only difference being i also changed the needle to an NFLR. Always starts first or second kick when very hot. When i tried a 48 pilot and a richer leak jet it was a pain to start hot. I wouldnt worry about a little popping...and just changing the header shouldn't throw the jetting off.

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I am running my o6 all stock and it is also very hard to start when it is hot. If I kill it then forget it, off the track we go to cool down and restart. Should I re jet?

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Thanks for the help guys. As soon as i pick up a carb tool i am going to do a little experimenting. I am pretty sure it was to fat for the air temp and that is why it would not start when it got hot. I suppose if you don't tip over you don't have to worry about it, maybe i should concentrate on that next time out. By the way if am in Elsinore which is about 600 ft but we ride as high as around 3000 i think when you get into the high desert.

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Thanks for the help guys. As soon as i pick up a carb tool i am going to do a little experimenting. I am pretty sure it was to fat for the air temp and that is why it would not start when it got hot. I suppose if you don't tip over you don't have to worry about it, maybe i should concentrate on that next time out. By the way if am in Elsinore hich is about 600 ft but e ride as high as around 3000 i think when you get into the high desert.

I race all the So Cal tracks on my 06 and 08. I never have to change my jetting for any of the different tracks...It stays the same.

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I bought my 06 used. It has the 48 170 combo in it. It runs great, starts hot or cold. My fuel screw is probably about 2 out.

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Altitude and temp is key here.

one thing for sure stock jetting is too lean

45/48 pj

165-170mj

these are the ranges for 900-2000ft

that I have tested that work for me

the NFLR needle works well in the 06 also

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I run my '06's from 3650 feet down to 25 feet below sea level (yes, that's correct) year 'round on the same jetting:

165/45/NFLP needle (stock) in #4/screw about 2.25 out

Truthfully, I could probably run 170/48 or a 170/45 in the desert during the winter (like today), but the bikes run great, and they start right up, hot or cold, so....:thumbsup: Besides, then I'd have to change it for my HA rides.

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