[Trudeau89]

that's progress. now look at the fuel screw, pilot jet and the AP diaphragm. make sure all of these are perfect working order. the pilot jet may look clear but can be partially obstructed and this will have a negative effect. check for strong and long AP squirt.

ken

Thanks, is there a 'how to' on checking ap squirt. And How to assess Strength of said squirt.

[crfsonly]

checking the AP squirt is pretty easy.

1. Remove the seat

2. Remove the tank (when removing the tank, you don't have to remove the shrouds from the tank. Just remove the shroud bolts that connect to the radiator. You can then take the tank off with the shrouds connected to the tank.

3. Remove the muffler

4. Loosen the air box clamp on the carb

5. Remove the lower sub-frame bolts and rotate the subframe up out of the way. You can leave the shock mud flap but be careful when lowering it as you'll need to guide it back or the tire will catch it.

6. Look into the back of the carb and fully open the throttle with a quick twist of the throttle tube. looking in the back of the carb you should see the AP nozzle deliver a strong and long squirt.

ken

[Trudeau89]

Uploaded with ImageShack.us



Uploaded with ImageShack.us

[Trudeau89]

This is a pic of the green stuff I had mentioned on the emulsion tube, I use pump VP so I think thats the green tint but curious if others view this accumulation as an issue.

But anyway to get everyone back up to date on my progress or lack there of:

Previously a nasty bog has been adressed by switching from a 42 pilot to 40. Bikewas runnign great except for issues starting.
Replaced hot start nut and performance/ inittial large throttle hit bog returned.

I figured maybe the hot start nut was the cause of the intial bog problem so I went back to the 42 pilot.

Bike still is not running great, it may not have the severity of the previous bog(wehre you could literally hear the bike bogging, however it feels as though the power just isnt there. Along with the fact that I can kill the engine with a large grasp of the throttle right off idle. I feel like I have to clutch the bike over the entire track to keep a good pace going.

I am in the process of switching to the 40 Pilot again, hoping that this is just a rich condition.

Is that what it sounds like I am describing?

[crfsonly]

the fuel accumulation in the photo is an issue. is fuel leaking out of the float overflow hose? reguardless, check your float it could be stuck or set to high.

on the hot start nut, did you inspect the hot start plunger? it's not uncommon for corrosion to form causing it to get stuck open. clean and light film of lubricant.

not sure what jetting you have but the JD Jetting kit we offer is the best jetting available. i would start with installing this jetting. on the pilot jet, i would be suspect if both are not brand new. any slight obstruction or reduction in the size of the jet will cause issues.

do you have AP squirt? check it if you haven't. if you have checked it and it's weak or short in duration or non existent then check the AP diaphragm and circuit.

report back.

[Trudeau89]

No fuel is leaking out of the overflow hose, not atleast that I have noticed.

I have a JD kit, installed for quite awhile now.

When I replaced the nut the plunger looked fine, no corrosion.

I have yet to check the AP squirt as I forgot to look before re installing sub frame last time.

The 40 Pilot was new, the 42 Is an 09 stock.

[Trudeau89]

You had suggested the float level when I posted the bog issue at the end of last year. So Over the winter when I dis assembled the carb I had the float level inspected by a dealer/shop to be sure. They claimed it was in spec.

[crfsonly]

i would venture that a lot of shop mechanics wouldn't actually measure the float height if they even knew how. no disrespect intended. most customer's won't pay the cost of the labor to do it as you have to remove the carb from the bike to do this correctly. check it yourself.

you removed the floating valve plate. are you confident you have it installed in the correct orientation? replace the seal while you are checking it.

all fuel comes into the carb from the float. fuel accumulating has to be coming from the float either from the jets or the AP nozzle. so, you've got to track it from those two points back to the float.

check the emulsion tube is installed correctly and has the buffer plate installed and undamaged.check the fuel screw and make sure there are only one each of the o-ring, washer and spring.

[Trudeau89]

What's th

[Trudeau89]

What's the best way to test the float level. Attempting to do what it says in the service book but I don't have a fancy float leek gauge.

From eye balling with a micrometer I'm getting 5/16, which is out of spec but want to make sure there isn't a more precise way other than eye balling before I adjust.

What's the best way to test the float level. Attempting to do what it says in the service book but I don't have a fancy float leek gauge.

From eye balling with a micrometer I'm getting 5/16, which is out of spec but want to make sure there isn't a more precise way other than eye balling before I adjust.



Measured again, it is more like right between 1/4 and 5/16. I'm thinking its too close with my lack of precise measuremnt to justify trying to make an adjustment.

[Trudeau89]

Using a dial caliper not a micrometer.

[crfsonly]

here's a thread on this with a link to a great how-to on carb cleaning and setting the float height:

http://crfsonly.com/forum/viewtopic.php?t=35861

[Trudeau89]

It's taken me awhile to get an update up here but here goes:

I ended up putting the bike back together that night and not completing the float level thread you sent over ( had a race the next day)

However one new symptom did present itself at the race the next day. I had the bike leaning up against a tree at a SLIGHT angle and noticed gas coming out of the overflow tube. I will be attaching a pic so you can view the angle the bike was at.

Does this confirm it is a float issue or still other possibilities ?

[crfsonly]

good to hear back from you. i wouldn't say it "confirms" it but it does warrant a check and likely adjustment. leaning at a critical angle will cause any carb to spew fuel through the float overflow.

[Trudeau89]

Would you consider this a critical angle.