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Post by allen on Nov 30, 2015 2:06:44 GMT -5
I have ultrasonic cleaned the carburetor, blown out and checked all passages except one, checked all jet sizes and ensured they are installed in the correct location. I would still like to know what the passage is that is located at 10 o'clock on the edge of the primary bore as you look at the engine side of the carburetor. The one below it is a vacuume port and has a jet in it. The passage in question is the one at 10 o'clock on the edge of the primary bore on the mounting face of the engine side of the carburetor, this passage on my carburetor is blocked. It will hold fluid and cannot be blown through. what is it? what does it do? Why is it there?
Come on someone with previous experience and knowledge must know.
Regards Allen
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Post by Jess on Nov 30, 2015 13:45:58 GMT -5
Allen,
There is a very detailed explanation of the carburetor and its circuits in the service manual.
It might be helpful in answering all your questions.
Best,
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Post by allen on Dec 1, 2015 1:23:46 GMT -5
Thanks Jess, I had already consulted the service manual, and studied the detail regarding the carburetor and its various circuits. My best guess is the passage is only part of the manufacturing process to allow plugs to be inserted, but why do the have relief cutaways direct to the primary port? Time to put the carburetor back on and see what happens. Maybe that will answer my questions.
Thanks for your help regards Allen.
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Post by timpa136 on Dec 1, 2015 14:01:24 GMT -5
what is it? what does it do? Why is it there? Come on someone Regards Allen Hi Allen, I got a big cold and the last thing I want is to smell carb. choke cleaner right now. So, without confirming for sure, I think you may be referring to the circuit that is a scavenger or purge port to scavenge extra raw fuel after accumulating in the secondary bore. As I recall, you can trace that circuit by the small hole passage that you see on the air filter side /bottom secondary area. Hope this might help Timpa136
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Post by allen on Dec 2, 2015 19:38:24 GMT -5
Ok worked out the passage at 8 o'clock looking at the primary, it is the choke unloaded circuit. Now unblocked. Still to work out what the passage at 10 o'clock is looking at the primary port, here's hoping. Still blocked.
regards aAllen
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Post by timpa136 on Dec 3, 2015 18:13:33 GMT -5
Allen,
Is it possible for you to post a picture and identify the port in question?
I'm sure we can answer that passage with the forums collective experience.
hang in there
Timpa136
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Post by allen on Dec 3, 2015 18:18:59 GMT -5
I have refitted the carburetor and have some improvement, yes I can take a photo, how do I get it onto the board, or can I email it to someone. Or simply look at the engine side face of the carby, look at the primary port, on the left side of the port there is two passages relieved to the primary port, one at 8 o'clock and one at 10 o'clock. The one at 8 o'clock is part of the choke unloader circuit, and the one at 10 o'clock is the one in question. Got to go and make a buck talk again soon.
Regards Allen
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Post by timpa136 on Dec 3, 2015 18:28:50 GMT -5
Hi Allen,
There are a few picture hosting sites available and others may offer suggestions.
The one I am familiar with is "photobucket" ., Load your picture from your camera to your computer . After signing on to photobucket search your computer for the desired picture. Upload that to photobucket and open both photobucket and the RE5 Forum on a split screen Then copy the "img" of the pic and paste it to the RE5 forum thread.
Please elaborate on what some improvement is so we can narrow down the carb circuit barring everything else is OK.
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Post by allen on Dec 3, 2015 23:44:41 GMT -5
There is a really big hesitation leaning out between primary and secondary if I can get it through the flat spot, by playing the throtle or injecting extra fuel into the secondary it revs fine. I don't think there is any air leaks, new gaskets fitted, new vacuume hoses, vacuume hose to fuel tap pluged, vacuume hose to vacuume switched checked, secondary diaphragm working, I can feel it opening the secondary, accelerator pump working, carb and port valve timing checked cables adjusted. I Will play with it more tommorrow, I still would like to know what the other passage is at 10 o'clock is it blocked and that is my problem or is something else. I need to eliminate it as a cause. As far as uploading a photo that maybe another story.
Regards Allen
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Post by timpa136 on Dec 4, 2015 17:55:18 GMT -5
There is a really big hesitation leaning out between primary and secondary if I can get it through the flat spot, by playing the throtle or injecting extra fuel into the secondary it revs fine. I still would like to know what the other passage is at 10 o'clock is it blocked and that is my problem or is something else. I need to eliminate it as a cause. Regards Allen Hi Allen, Your immediate problem sounds exactly like additional restriction/ clogged passages in the Secondary PILOT jet circuit. This is the second most smallest passages and painstaking passage to clear. I have pointed out the area where there is a passage and crossover to trace out. The bike has to run good there( 55-65mph) regardless of the accel. pump. Make sure you have this plug. Sincerely Tim
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Post by allen on Dec 5, 2015 1:31:52 GMT -5
Thanks for your help, the secondary pilot circuit on my carburetor appeared to be clear when spraying carb clean or compressed air through it, although it could have some restriction. When the secondary starts to open the secondary pilot CRT should start to deliver fuel, and on looking down the secondary with the engine just coming onto the secondary that's when it starts to starve, so what you indelicate may be right. The brass plug in photo 2 is there, in photo one I would still like to know what the passage on the edge of the primary throat at 10 o'clock is? I will take the carburetor off again and concentrate on the secondary pilot CRT especially where it exits into the secondary bore just above the butterfly.
thanks again regards Allen
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Post by allen on Dec 5, 2015 2:41:22 GMT -5
Carburetor back off check and clean secondary CRT again, no restriction evident. Jets removed. Rodded with wire and looked for visual where possible, proved with carby cleaner and compressed air from float bowl to carby face, from carby face to exit above secondary butterfly. Secondary main passage from beside biasing pipe to float bowl rodded and checked with carb cleaner and compressed air. Biasing pipe to secondary Venturi checked, rodded, carb cleaner, compressed air, float bowel gasket relieved around biasing pipe to ensure plenty of clearance. Checked both air bleed jets and circuits, carb cleaner and compressed air. Checked secondary vacuume CRT from jet to hose. Carb cleaner and compressed air. Checked float bowl cover circuits, rodded, carb cleaner and compressed air. New air filter fitted to float bowl cover. New fuel needle and seat fitted, float height checked.
Questions Does the vacuume hose to the secondary diaphragm have a limiting jet inserted into the hose prior to the diaphragm? What is the correct vacuume pipe to connect the secondary diaphgram hose to ( The high one ) ? Regards Allen
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Post by timpa136 on Dec 5, 2015 14:51:55 GMT -5
[/quote] No limiting jet in production carbs. They experimented with a jet in the hose pre-production. You are right about vac hoses, see PIC
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Post by timpa136 on Dec 5, 2015 14:58:39 GMT -5
When the secondary starts to open the secondary pilot CRT should start to deliver fuel, and on looking down the secondary with the engine just coming onto the secondary that's when it starts to starve, so what you indelicate may be right. I would still like to know what the passage on the edge of the primary throat at 10 o'clock is? thanks again regards Allen We can speculate what that passage might be for, I'm uncertain. It is deep and aligns up with that external opening on the top that is plugged . View in previous PIC of top bowl.
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Post by allen on Dec 5, 2015 15:33:43 GMT -5
Thanks so much for your input, Im off to work now, and it's our club ride and Christmas BBQ today so I will not refit the carburetor until later today.
Thanks for the photos Regards Allen
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