choke position and dieing at 2 grand

ok so i finaly got everything in place and i was ready to start the bike. i pull the choke and hit the buttom. SHE STARTS!!! when i reduce the choke the bike will stuter and shut off. also if i leave the choke on and then rev the engine it will cut out and 2 grand and die off. my asumtion was to let the bike warm up at first so i let her run for a while and came back. let go of the choke and the bike still dies. .

i assume its the enrichment circuit. i have just done a full cleaning of the carburators took every last net and jet and anything i could see to have it clean. so i assume that the fuel air mixture is off?

im unsure to where the fuel to air mixture screw is and my manual is not that detailed. more detailed one on the way.

any ideas did i miss something. i know the part the extends in to the bowl with a really small whole on it should be cleaned but i thought that was related to the choke?

im really dreading taking the carbs off again but let me know what you guys think.

 

You've got a bike that will idle unassisted for minutes at a time, but won't take any throttle- - you're almost home.
Before taking anything apart, check that it's idleing on all 4 by spraying water on the exhaust. If a pipe stays cold, that carb needs pilot jet work.
Next, check the float level of each carb with the bike on center stand using clear hose on the float drain. Gas should come up to 3 MM below the float gasket.
Now take the carbs off. The pilot jets are in the main body, at the front-top above the butterfly area, and may be covered with caps that need to be removed very carefully.
Search topics: "whole nine yards" and "Old School carb cleaning"
If you didn't find "beanie screens" , pilot jets, and every tiny emulsion tubes, then you really didn't clean your carbs.
That's OK, most people miss stuff the first go, and you got clean carbs to clean.

 

agreed on the idle pilot circut. and a better cleaning. it sucks to have to do it again but better that its done right. on mine i cleaned each one a couple times till i was sure what i was hearing was exactly the same.

 

Midnight, did you bench synch your carbs before you reinstalled? That could be an issue as well.

 

yea i bench synched them at .02 mm just like the manual said. they ran great sounds smooth all the way to 10k rpm.... even burning plug chops at 5500 and at 7000 reveal a little on the rich side (better a little rich than lean i say). i'll have to tear them back down and double check the enrichment circut and my intake seals.

 

I agree on the better a little rich than lean. Just thought I'd ask about the bench synch, alot of times we forget that step. I know I have.

 

ok guys so i changed the fuel enrichment vavle to 2.5 turns out and started it up again. took a bit of either to get her going this time for some but once its started it ran decently.

took my spray bottle of water and sprayed the 4 headers. the two inside ones werent hot so i took the plug out and watch the spark happen so its sparking. the two outside cylinders are running perfect.but agai ni still have the same problem of it dieing at two grand.

so i guess ins back to the board and cleaning those stupid carbs again. they are hard to get out. next pay check some pods filters

 

Pods are not going to help you. Pods are for Racers and Choppers. And Mechanics. So, what happens when you shoot a little ether into the airbox while it idles? I bet the engine revs right up!!! You need to go thru the Pilot and low speed circuits of carb #2 and #3. (That's assuming the floats are working correctly)

 

oh the pods were only for making removal of the carbs a hell of alot easier then trying to fight with the airbox. and i am a self proclamed machanic just not used to bikes. it would help if i had a diagram of the carbs to go by for this system. im used to cars aswell but bikes are fun aswell. the reason i sound like i dont know what im doing is because im just making sure. like i said i dont have a manual yet so im going by what people say. plan on a manual next paycheck along with those pods. ill do a more thorough cleaning of the carbs. im very impatient and probably over looked a few things. thanks for the help keep me posted

if there is anywhere i can find and only version of a clymer or haynes manual please send a link. thanks again.

 

im also assuming that the fuel rail has some unremoved gunk that i over looked or maybe the petcock valve is not working as well as it should. im cleaning both out. but that still wouldnt explain the two inner cylinders.

does any one know if chacal has a petcock rebuild available before i send him a pm?

 

Bikeranger, check ebay, they are on there all the time. A manual is a good investment when it comes to working on these bikes & the info from all the experts on the site is priceless.

 

Check xjchat forum for the thread Need Quick Accurate Answer, there is a post in there for downloadable manuals on line. That should help get you where you want to go.
Gregg

 

Manuals - I take no credit for this somone passed it to me- http://www.4shared.com/dir/1570443/a2eb ... aring.html

Additionally dont just shoot a little cleaner into the mix screw holes you need to clean the entire carb. - float needle screens getting clogged or if you have an in-line fuel filter thats clogging up will cause this symptom.

 

Ok guys so i took my petcock valve off and inspected all looks good and seems to work good no dirt inside . next off i took apart my carbs and am in the process of re cleaning them this time making sure i spend atleast an hour - two hours cleaning. also making up a check list for the next time. ive also preformed a push compression test. done by leaving one plug in at a time and seeing how easily it roles. this is temporary till i can get a psi gauge. all seems well. my question is ive read allot about setting floats, and i was wondering if there is a way to set it with the float bowls off with a measuring stick. i understand that the fluid level has to be roughly 3mm under the gasket line when upright.

how would i measure this with the bowls off and from what point on the floats?

any ilustrastion would be great considering i have a visual learning style.

oh yeah i have mikuni carbs i have seen a few posts about the hitachi carbs. same consept? :S :S