Hard to start when cold?

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Old May 18, 2010 | 02:37 PM
  #31  
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Your choke run time sounds about right. With the .022" bit on mine, it only runs smoothly on the choke for about 5 seconds. I'm surprised, however, that both in your case and mine, the bike will idle that quickly after turning off the choke. You'd think the engine would still be too cold and want to die without some more fuel. I usually go ahead and twist in a tiny bit of idle adjustment while I'm putting on my helmet and such, but you can tell that the bike will run darned smoothly almost immediately after turning off the choke.
 
Old Jun 10, 2010 | 06:01 PM
  #32  
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I had the same problem--just my '09 was hard to start anytime the engine was off--cold or hot. I tried all the tricks--it would crank and crank, but not turn over. Finally, it would start after a few minutes of coercing. I ran two treatments of Sea Foam through the tank (the bike sat over a year at the dealer before I bought it) and then things started to improve (at about 350 miles). The bike would start cold, but struggle when it was hot. I ran one last treatment of Sea Foam through it at 450 miles and now it starts hot or cold without an issue. I have 600 miles on it now. I also made a habit of using the kill switch when I shut down the bike, as well as turning off the fuel at the pet **** after every ride. It seems to have worked for me. I was hoping I wouldn't have to do any mods. I will keep you updated.
 
Old Jun 10, 2010 | 06:19 PM
  #33  
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My 09 was very hard to start by after the rejet, pipe, and muff it starts much easier.
 
Old Jul 6, 2010 | 01:14 AM
  #34  
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Originally Posted by bootmud
My 09 was very hard to start by after the rejet, pipe, and muff it starts much easier.
Wow! What a difference . I installed the jet kit and drilled the hole, NOW it starts up on the first try everytime.
 
Old Aug 24, 2010 | 10:11 AM
  #35  
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Originally Posted by TNC
I was really impressed with its clean running from idle to wide open. Fuel mileage under hard riding was excellent IMO.

I think richening up the lower end of the fuel delivery curve helps. However, nothing affects cold startup performance like the starter jet. My opinion on overall jetting has usually been to run as lean as possible without verging on detonation or stumbling. Clean, crisp fuel delivery keeps the carbon buildup down, increases fuel mileage, and causes less issue when altitude climbs. I'm super happy with the jetting on this bike. Power is strong, mileage is excellent, and an absolutely linear feel in the powerband exists throughout the range.
How do we know if we are running as lean as possible to have clean, crisp fuel delivery?

What MPG are you getting with : Hard riding? Normal riding?
 
Old Aug 24, 2010 | 10:24 AM
  #36  
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Originally Posted by TNC
The Kouba fuel screw allows you to more easily adjust the fuel screw setting while the bike is hot and running...which is when you should really be adjusting the fuel screw. On your new bike, you generally can't see the actual fuel screw, as there's a plug covering the access hole. It's located right at the front of the carb on the bottom, very close to the rubber intake manifold. It takes a very short bladed screwdriver to access the stock fuel screw when the plug is removed. Trying to do it on a hot and running engine kinda sucks.
How do you know when the air/fuel mixture needs adjusting?
 
Old Aug 26, 2010 | 12:23 AM
  #37  
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Originally Posted by Kamp
Hard to tell carb parts on the diagram, don't give a bottom up view like this pic.

Is TNC drilling the circled port, to the right of the main jet in this photo?

How deep do you drill in?
 
Old Aug 26, 2010 | 01:54 PM
  #38  
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How deep do you drill in?
If you are talking about the starter jet - all the way through. Above, you say the rejet and hole drilled out solved your starting issue. What are you trying to accomplish? Have you got a Kouba screw?
 
Old Aug 26, 2010 | 08:43 PM
  #39  
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Originally Posted by Kamp
If you are talking about the starter jet - all the way through. Above, you say the rejet and hole drilled out solved your starting issue. What are you trying to accomplish? Have you got a Kouba screw?
Yes, it did but now its doing the same thing again. Dont know why.
1-After i bought it everything worked fine and it turned on at the first push of the starter
--A month later it has starting issues

2--I rejet it and everything works as before, starting on the first push
---Now im having the same issue as before. It takes about 4 pushes to start.

That is why im going to try to drill the starter jet.
 
Old Sep 24, 2010 | 10:16 PM
  #40  
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i had the same problem. my problem was a dirty/clogged pilot jet. i pulled out my carb, removed all the plastic parts, removed the jets and boiled the carb and jets in water for 10 min. now it starts up on first crank everytime, hot or cold.
 



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