Author Topic: ? about pilot jet plugs in my B4 carb?  (Read 3871 times)

Offline Levi

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? about pilot jet plugs in my B4 carb?
« on: June 03, 2010, 12:25:42 PM »
Hey guys. I was wondering if any one knew about the pilot jet plugs in the B4 carbs. Do they need to be plugged or unplugged. As of right now My carbs have 1-3 plugged and 4 unplugged. It was running fine, then develloped a miss. I cleaned my carbs and did a float level agjustment to get them even. This is when I noticed the plugs. I got it all back toghter and it started right up but I have that same miss. Im getting a nice blue spark on all the cyls.  no vacumme leaks as I've gone through and fixed the one I had. I saw a thread on the pilot jet  plugs so I got to wonder if I needed them. I did have a Mechanic rejet the carbs a while ago and I wonder if he forgot to install them back in. But the bike ran ok so I dont think you need them? Any insite would be very apperciated. This Bandit has been a bear to get right.  I also wonder if I need to adjust the idle circut to run better. If I gas it, it seems all the cylns fire ok. But on idle it misses a little. THX

Offline tabby

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Re: ? about pilot jet plugs in my B4 carb?
« Reply #1 on: June 03, 2010, 02:27:01 PM »
I'm not sure why those are there. I've seen them on other Suzi carbs also. I ditched mine. I used my 10X eye loupe to see if I could find any other port to supply fuel to the pilot jets, and I couldn't find any. So I ditched em. My guess is that they are there to sneak the motor through some portion of the EPA test. My B4 is running pretty good currently. I replaced all of the o-rings {5 per carb!!}, set the floats, installed the FactoryPro jet kit, K&N filter, drilled airbox lid, and after a good valve clearance adjust, synched em too. Fires right up and purrs.

Offline Levi

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Re: ? about pilot jet plugs in my B4 carb?
« Reply #2 on: June 04, 2010, 01:15:59 PM »
Well actually I made a mistake the plugs are not there on CYL. 2-4 and 1 has the plug. It sounds like I can get rid of the plug and be ok .Im gonna try that. I havent played with my vavles in a while. Maby they need adjusting. Im hopeing its not that hard. I belive i have all the details I need to do it. Thanks for the responce.

Offline tabby

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Re: ? about pilot jet plugs in my B4 carb?
« Reply #3 on: June 05, 2010, 11:27:08 AM »
Well actually I made a mistake the plugs are not there on CYL. 2-4 and 1 has the plug. It sounds like I can get rid of the plug and be ok .Im gonna try that. I havent played with my vavles in a while. Maby they need adjusting. Im hopeing its not that hard. I belive i have all the details I need to do it. Thanks for the responce.
There is good advice here on valve adjustment. One real important one is PATIENCE! Oh, and don't drink too many beers. None would be better.

Offline Levi

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Re: ? about pilot jet plugs in my B4 carb?
« Reply #4 on: June 06, 2010, 09:43:56 PM »
I'm wondering what symtomes the bike would have with the valves out of adjustment . Do they go out of adj. often or after time?  I was never that hard on the engine choosing to save it for times of need. Ya know?   :thanks:

Offline tabby

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Re: ? about pilot jet plugs in my B4 carb?
« Reply #5 on: June 08, 2010, 12:50:41 PM »
That is a tough one. Obviously, more use would encourage them to move about, but modern Japanese engines can be very forgiving. The only way for an owner, if he is doing the work himself, is, indeed, to do the work himself, and keep an eye how his or her engine wants to behave. There are sooo many variables, oil used, change intervals, how hot the engine gets and for how long. Man, I could on and on, and not have a clue. With my 86 GSXR, the valves moved around a bit in the first 10,000 miles, then setteld down for a 30,000 mile stretch. I'd go in to check them each winter during down time, and find them within spec. "FINE, be that way!" I'd say with a big grin on my face, sipping a cold one. You can be real nit picky and write down what you set them at, and keep track from there. I was never that picky. I do tend to set them on the loose side of the tolerance called for, as you can't really hear them tighten up, and that can be more damaging than being too loose, especially for the exhaust valves. I figure that tiny extra bit of time closed will help the exhaust valves bleed away a few more BTUs. Your mileage may very {Chuckle}.

Offline Levi

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Re: ? about pilot jet plugs in my B4 carb?
« Reply #6 on: June 08, 2010, 01:15:07 PM »
Ya I realize that question is very vague but I ve been tryin to dial this Bandit in for a long time now and am at the end of my rope. I dont think the valves have been touched sence Ive owned the bike. I know I've put a lot of miles on it and had it for about 10 yr now. So I fiqure I need to take a look. Its just a lot of work and I just got it all back toghter. :banghead:.I did my fork seals, Carb cleanning and float adjustment .New ignition system. Engine is somewhat low time. I dont think its a vacume leak. I got spark. This wase'nt all done at the same time mind you. Thanks for the advice on this Turbo! Im gonna take a look in there I guess. It will give me somthing to do sence I cant ride it. LOL