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Old 01-06-2013, 06:35 PM   #6676
brucifer
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Kinda sounds like you're running out of fuel. How's the fuel flow to your carb? Maybe the screen on the petcock is getting clogged and slowing fuel delivery enough that it can't keep up while running.
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Old 01-06-2013, 08:31 PM   #6677
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Quote:
Originally Posted by Moparmanpete View Post
Petcock filter is clean and has great flow. I had a clear rightangle filter in the line that was clean too but I removed it. I hate the way one has to run the line (clarke tank). I have a curly cue thing going on so it's probly air trapped in the line now. It's 1/4in fuel line which I think it too big, zip ties on the ends. I wonder if silcone air tubing would work with the fuel?
Have you checked the fuel cap vent?
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Old 01-06-2013, 08:51 PM   #6678
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I would try going fatter on the pilot jet like Steve says, and maybe check the float level.
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Old 01-06-2013, 10:38 PM   #6679
Mike the Yank
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Thumbs down

Quote:
Originally Posted by Moparmanpete View Post
Petcock filter is clean and has great flow. I had a clear rightangle filter in the line that was clean too but I removed it. I hate the way one has to run the line (clarke tank). I have a curly cue thing going on so it's probly air trapped in the line now. It's 1/4in fuel line which I think it too big, zip ties on the ends. I wonder if silcone air tubing would work with the fuel?
Gas will eat silicone tubing. Makes it a stick gooie mess.
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Old 01-07-2013, 03:11 AM   #6680
Homerb
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You know what l hate?

I really hate it when you rebuild your motor, replace all the bearings, seals, gaskets, new piston, conrod kit, put the engine in the frame, fit the alternator, starter motor, (yes, its an electric start XL600RMG), fit the oil pump, only to find that the bolt that holds the oil pump line to the crankcase is in backwards, and the only way to fix it is re-split the cases! Fucksticks.
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Old 01-07-2013, 06:32 AM   #6681
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Quote:
Originally Posted by Moparmanpete View Post
I plan to, I just wish I knew what brought it on all of a sudden. I knew the valves would need to be readjusted after the build.

The pilot screw for some reason is baffling me on this bike.
Turning slowly ofcourse, There is no noticable rpm increase or decrease just too far in and it will stall and die suddenly too far out and I get the High rev syndrom.

I wonder if I have a piece of dirt in there?
Yeah, having a piece of debris in the idle circuit or pilot jet could make it do what it's doing.

If the bike was running fine for a while and then suddenly started running bad, I don't see you needing to change the pilot jet. It will either run fine or it won't from the get go--it won't suddenly start running lean.

Make sure there's nothing blocking the fuel flow between the fuel line nipple on the carb and the float needle valve.
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Old 01-07-2013, 06:39 AM   #6682
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Homerb- Ahhhh man. That really, REALLY sucks.
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Old 01-07-2013, 06:47 AM   #6683
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Gaaah indeed. Spent this afternoon putting it right. I might finish it tomorrow, though the forecast is for 43c and 50mph winds, so l think I'll be staying indoors!
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Old 01-07-2013, 08:56 AM   #6684
Carter Pewterschmidt
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Quote:
Originally Posted by brucifer View Post
yeah, having a piece of debris in the idle circuit or pilot jet could make it do what it's doing.

If the bike was running fine for a while and then suddenly started running bad, i don't see you needing to change the pilot jet. It will either run fine or it won't from the get go--it won't suddenly start running lean.

Make sure there's nothing blocking the fuel flow between the fuel line nipple on the carb and the float needle valve.
+1
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Old 01-07-2013, 09:00 AM   #6685
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Gaaah indeed. Spent this afternoon putting it right. I might finish it tomorrow, though the forecast is for 43c and 50mph winds, so l think I'll be staying indoors!
What the serious fuck? That's almost 110 degrees Fahrenheit! How is it that hot out and that windy at the same time? You guys must have some crazy hot jet streams or something down there.
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Old 01-07-2013, 03:44 PM   #6686
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Your said it, Carter.
Hot north westerly winds from central Australia, humidity less than 10%, and the worst bushfire conditions in a hundred years. 35C at 8am at my place.
Should be an interesting day!
On days like this I'm happy to be retired from the fire service.
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Old 01-07-2013, 05:20 PM   #6687
RFVC600R
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Got my fork seals done, about to go climb some dunes
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Old 01-07-2013, 06:33 PM   #6688
Carter Pewterschmidt
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Quote:
Originally Posted by Moparmanpete View Post
Well.......
Changed out the fuel line for a 3/16 line, lot better fit, alot shorter....... start it.... ran for about 6mins cough and die

Pulled Pilot screw blew it out with cleaner, reinstalled pilot screw 2 turns out..........start it..... runs for 7mins.....

starts to cough, give it an evil rev a few times....idles back down.....sounds great idles smooth, revs smooth.....


................(hopes are high).....................



.runs for 8mins...




.................. cough and die. (hopes squashed)



Plan to pull the carbs and diligently inspect for dirt later tonight............................when I get my enthusiam back




Leave the carbs in and run a fuel line straight into the carbs bypassing the petcock. It sounds like your motor might be running off the gas in the float bowls. Sometimes debris gets in your fuel tank and it will either clog the petcock itself or plug up the screen that takes fuel in. If that's the case then you can pull the petcock out, pull the bowl off it and clean that all out, then clean the screen that takes fuel in and flush the tank.
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Old 01-07-2013, 07:27 PM   #6689
RFVC600R
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No pics today, just a quick jaunt. I had 35 in both psi tires and the new kendas have better traction in the soft sand than the old ones at 15psi. And the handling is awesome since the new seals and oil. The bike turns better, brakes better, and offroad is enjoyable again!

Next is chain, sprockets and, turn signals when they come in the mail this week

Quote:
Originally Posted by Carter Pewterschmidt View Post
Leave the carbs in and run a fuel line straight into the carbs bypassing the petcock. It sounds like your motor might be running off the gas in the float bowls. Sometimes debris gets in your fuel tank and it will either clog the petcock itself or plug up the screen that takes fuel in. If that's the case then you can pull the petcock out, pull the bowl off it and clean that all out, then clean the screen that takes fuel in and flush the tank.
Ehhh.... my bike runs out of fuel faster than seven minutes with gas off.
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Old 01-07-2013, 07:56 PM   #6690
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Just a thought, does your fuel have ethanol in it? The metal used in some honda carbs from the eighties doesn't like ethanol, which can cause rapid deposits to form in the carb, as the ethanol reacts with the metal. Doesn't happen with all honda carbys just to confuse matters.
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