Bike Cuts Out ALOT!!!
05-18-2007, 09:43 PM
#1
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Squid
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Join Date: Feb 2006
Location: Klamath Falls, OR
Posts: 53
Bike Cuts Out ALOT!!!
My cam chain tensioner broke. I had to replace it and the valves... Went to go pick it up and it idles fine. But when i went out on a test ride from 1/8 throttle to about 1/2 throttle any gear it feels like it is surging... cutting out and is back firing... But when i get on the throttle it runs fine. Like above half throttle. Could this have anything to do with the timing? Maybe jets? But the thing is i never changed anything when it broke down. And it ran fine before that? It did sit for about a year though. but i drained the gas out of the tank. Any help would be great!!!!!!! Im already into this like 800 dollars and it is really making me mad. Thanks
05-19-2007, 05:44 AM
#3
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Superstock
Join Date: Jun 2005
Location: Trussville, Alabama
Posts: 406
Ditto. Sound like the little holes in the secondary (pilot?) jets are partially clogged.
Seems when you get to the main needle jet it runs fine, but transitioning through the secondaries is where you have problems.
Seems when you get to the main needle jet it runs fine, but transitioning through the secondaries is where you have problems.
06-05-2007, 09:35 PM
#6
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MotoGP
Join Date: Dec 2004
Location: South Texas
Posts: 2,553
Open the airbox and see if both of them are at the same location. Push them up and let them return. Are they at the same rate? Even a slight difference can mean poor running as you described.
To me it sounds like one is rising slower than the other but eventually opens up.
To me it sounds like one is rising slower than the other but eventually opens up.
06-05-2007, 10:00 PM
#7
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Squid
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Join Date: Feb 2006
Location: Klamath Falls, OR
Posts: 53
Okay so i took the tank off and i belive i had all of the hoses hooked up right on the fuel tank. i took the air box all the way off. so now i have the carbs completely uncovered. so i looked down into each carb and pushed each slide to the side and released them and they seemed to move at the same rate. so what do you do to check the petcock? also i was reading and someone said that if the diaphram has a tear of rip in it could cause it to what it is doing.
06-06-2007, 07:16 AM
#10
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SuperSport
SuperSport
Join Date: Dec 2006
Location: Victoriaville, Quebec, Canada
Posts: 880
If he can run WOT the petcock don't starve the engine, I used to check what have been disturbed by a mechanic first in those situations. The jets are located under the carb, what you see is vent holes. You need to take them off completely, unscrew the bowls under them to get to the jets. So unhook throttle position sensor, throttle cables, coolant lines, unscrew the boots and pull like mad, be careful not to pull on the linkage or sensitive parts. You may want to check the plugs first to see how they looks, if you can post a picture it would be nice, a lean out would shows from whitish carbon.
It could be valve timing, but the bike would idles rough and die sometime. Are the symptoms RPM dependent ??
It could be valve timing, but the bike would idles rough and die sometime. Are the symptoms RPM dependent ??
06-06-2007, 04:12 PM
#11
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Squid
Thread Starter
Join Date: Feb 2006
Location: Klamath Falls, OR
Posts: 53
The bike idles fine. And when im pass 1/2 throttle it seems to run okay. but from pass idle to 1/2 throttle it seems to surge and miss. Also when i have the bike idling and i rev it up it pops and backfires. Now it has never done that while accelerating. It has poped and backfired when down shifting. But that is normal. So at a kinda high RPM it seems to run okay... But at a low RPM it runs like crap!!!!!!
06-06-2007, 10:02 PM
#12
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Squid
Thread Starter
Join Date: Feb 2006
Location: Klamath Falls, OR
Posts: 53
WOW finally think i figured it out... Even though Hawkrider and Brian A said it from the begining. Pulled the carbs and checked the jets and bolth pilot jets were clogged. so cleaned them real good and put everything back together. Took the bike out for a spin and wow what do you know back to normal! The only crappy thing is while hooking everything back together i over tightened one of the choke cable nuts that screws into the side of the carb and it broke off!!! So half of it is stuck in the carb and then the rest kinda dangles out... So now i have to order a new one! But overall runs good! Hey thanks for all the help guys!!!!!!!!!!!!
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