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Discussion Starter · #1 ·
I'm having issue with this quad starting. I have about 7 hrs on the quad.
When the quad is cold, it takes a couple trys to get it to start. That is with the choke/ fast idle adjustment pulled. Once the quad is warm (5 mins or so) I can turn it off and then try and start it again and it will not fire up. I have the choke off and I'm also trying the ( on/off method) with the key switch to prime the fuel pump. It seems like the intake valves might be too tight?? It will backfire thru the exhaust every once in a while. Now, if I go out riding for a while and stall the quad it will fire right up. However, if I let set for 5 min's or so, it takes forever to get it started.

I talked to Yokley at loretta's this weekend and he said to adjust the throttle positioning sensor????

BTW, air filter is clean and it has plenty of gas..

Here are the mods I have on the quad: Uncorked exhaust, removed air box lid. (uncorked exhaust/removed lid) PC III Map.
 

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I'm having issue with this quad starting. I have about 7 hrs on the quad.
When the quad is cold, it takes a couple trys to get it to start. That is with the choke/ fast idle adjustment pulled. Once the quad is warm (5 mins or so) I can turn it off and then try and start it again and it will not fire up. I have the choke off and I'm also trying the ( on/off method) with the key switch to prime the fuel pump. It seems like the intake valves might be too tight?? It will backfire thru the exhaust every once in a while. Now, if I go out riding for a while and stall the quad it will fire right up. However, if I let set for 5 min's or so, it takes forever to get it started.

I talked to Yokley at loretta's this weekend and he said to adjust the throttle positioning sensor????

BTW, air filter is clean and it has plenty of gas..

Here are the mods I have on the quad: Uncorked exhaust, removed air box lid. (uncorked exhaust/removed lid) PC III Map.
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I have found that the pcIII map (002) is way to rich, I have called powercomander about this? Any way for now I have removed the PCIII from the bike and put back to stock, starting problem gone. also I did lose power with the 002 map and the exhaust Uncorked,
 

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Discussion Starter · #4 ·
That's good to know!! I'll set the programmer to stock bike and put the silencer and lid on tonight.

Thanks guys!!!
 

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Discussion Starter · #6 ·
QUOTE (QUADROOKIE @ Apr 30 2007, 09:20 AM) index.php?act=findpost&pid=1611
BUT...the same dyno shows an increase of rwhp of over 2 hp and torgue with the lid off and everything else stock.
So, are you saying to cork the exhaust and leave off the lid??? I guess I could try that. Hell, I'll try both. At this point, it can't get much worse
 

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I turned the idle screw up 2 clicks and haven't had a problem starting since then. I still have stock pipe and lid though. I will have the yosh pipe this weekend and will change the mapping and let you know how things go.
 

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Discussion Starter · #11 ·
QUOTE (bmann400 @ Apr 30 2007, 11:49 AM) index.php?act=findpost&pid=1615
I turned the idle screw up 2 clicks and haven't had a problem starting since then. I still have stock pipe and lid though. I will have the yosh pipe this weekend and will change the mapping and let you know how things go.

Yea I thought about doing that. The problem is, I've already adjusted that and I don't remember what stock was.... do you know if you can turn the knob all the way in and back it out like a fuel screw on a carb???

Rookie, I'll try map 3 tonight and see what happens. I installed the baffle at lunch but did not have time to test out the starting. I will not be able to ride the quad for a few days because I sent my shocks off to derisi racing for a conversion.

Thanks for the help guys!!
 

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I also turned my idle screw up a bit, not sure how much, but that helped with the starting also, as well as helped it from wanting to stall on slow tight turns.
 

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Discussion Starter · #13 ·
I turned up the idle a couple clicks. I changed the map to stock exhaust and stock filter. I corked the exhaust and left the lid off. Now I'm charging the battery and I'll try it tomorrow. I got my precision stabilizer today and installed it while the battery was charging.
 

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QUOTE (kx515 @ Apr 30 2007, 08:25 PM) index.php?act=findpost&pid=1644
I turned up the idle a couple clicks. I changed the map to stock exhaust and stock filter. I corked the exhaust and left the lid off. Now I'm charging the battery and I'll try it tomorrow. I got my precision stabilizer today and installed it while the battery was charging.

What altitude are you guys running at? I am at sea level and pulled the baffle and airbox lid off with the PCIII map (baffle out / lid off). The quad RAN GREAT! It had significantly more power, I mean significantly more power. All 4 people that tested it agreed as well. I think your altitude has a lot to do with the map working correctly or not.

PDR
 

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Discussion Starter · #15 ·
QUOTE (PDR @ May 1 2007, 07:21 PM) index.php?act=findpost&pid=1658
What altitude are you guys running at? I am at sea level and pulled the baffle and airbox lid off with the PCIII map (baffle out / lid off). The quad RAN GREAT! It had significantly more power, I mean significantly more power. All 4 people that tested it agreed as well. I think your altitude has a lot to do with the map working correctly or not.

PDR
I'm close to sea level (250ft or so). I also don't have the magic 10 hrs on the quad yet. BTW, the precision stabilizer showed up at the door yesterday. Thanks for the Great Deal !!!!
 

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Your welcome. I did not have the magic 10 hours either. It makes no sense that these maps are working for some and not others.

When you guys uncork the exhaust you pull the ENTIRE baffle out and run it like that correct?

I am at sea level and mine worked flawlessly. I would double check your map and double check your connections.

PDR
 

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Discussion Starter · #17 ·
QUOTE (PDR @ May 1 2007, 11:45 PM) index.php?act=findpost&pid=1668
Your welcome. I did not have the magic 10 hours either. It makes no sense that these maps are working for some and not others.

When you guys uncork the exhaust you pull the ENTIRE baffle out and run it like that correct?

I am at sea level and mine worked flawlessly. I would double check your map and double check your connections.

PDR
on the exhaust, I'm taking out the three bolts in the muffler end and pulling out the black piece with screen on the back side of it. Then I'm reinstalling the silver endcap with the three bolts. I'll recheck all of my connections tonight. Now, my problems with starting were there before I installed the PC3. I really don't know if the bike was running rich or not. I have no dyno to check the bike nor have I checked the plug. With the exhaust uncorked, lid removed, and map #2 installed the bike ran fine. I'm justing having problems with the bike starting. After the bike is running it seems to do fine.
 

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QUOTE (QUADROOKIE @ Apr 30 2007, 07:04 AM) index.php?act=findpost&pid=1609
There is a dyno chart on another site showing it is a loss of power to uncork the exhaust. In no way does it help at all.
That's a suprise for sure! My YFZ really woke up when I took it's pea shooter out (that is what we're talking about right? the spark arrestor deal in the outlet). I wonder if it's a backpressure issue, and how the aftermarket exhausts deal with it.
 

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I work for a dealership and have talked to Kaw on this issue of starting problems. They say to set your Throttle Position Sensor voltage at the top end of the specs. I can't remember the useable range i'll check the service manual and get back to you.

Other tips when starting are do not under any circumstances touch the throttle, and wait for the fuel pump to kick off. i very seldom ever use the fast idle on mine, always starts flawlessly.
 
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