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Post by teejayexc on Jan 15, 2014 21:15:28 GMT
OMYDC. I've drained and taken the tank of my bike tonight, with the aim of doing a bit of work on the carbs, more on that later. A thought occured to me, would it have been better to leave a covering of fuel in the tank to stop 'things' drying out completely or d'ya reckon it'll be ok dry? Going to be off the bike for a while whilst I tinker. Now, back to the carbs. Bike runs fine but ever since I took the AIS off it sounds, (only way I can describe it), burblier  . Might be that taking the AIS off as altered the fuel/air ratio? Plan to strip the carbs and give 'em a spruce up whilst I'm at it so need the input of the members on this....are most of the bits re-usable, ie 'o' rings and the like or do I need to be looking at some sort of rebuild kit before I start and what are the collective thoughts on altering jet sizes whilst I'm in there? Tia for any, useful, input  |
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Post by m40man on Jan 15, 2014 21:28:30 GMT
Now, back to the carbs. Bike runs fine but ever since I took the AIS off it sounds, (only way I can describe it), burblier . Might be that taking the AIS off as altered the fuel/air ratio? Should be impossible, surely? AIS is all after combustion isn't it  . .............. was the dregs of the tank nice & orangey  ? |
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Post by Deleted on Jan 15, 2014 21:29:57 GMT
There isn't a rebuild kit for the carbs AFAIK and the price of replacement O rings will give you sleepless nights.
I just used a smear of blue hylomar on the bowl rubbers on re-assembly and there was no leaks.
As for a dry tank, as long as you leave it in your warm centrally heated garage, there will be no issues, otherwise just put a 100ml of engine oil in the tank and swill it around to create a coating to prevent corrosion, then swill out with a small amount of petrol before re-fitting.
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Post by teejayexc on Jan 15, 2014 21:51:10 GMT
Now, back to the carbs. Bike runs fine but ever since I took the AIS off it sounds, (only way I can describe it), burblier . Might be that taking the AIS off as altered the fuel/air ratio? Should be impossible, surely? AIS is all after combustion isn't it . .............. was the dregs of the tank nice & orangey ? Hmm, thinking about it, maybe*. I did notice in Mr Haynes that the AIS has reed valves built in that close on shutting the throttle thus stopping excess air getting sucked into the system and preventing exhaust popping, explains that bit then  * note the use of maybe, not 100% sure. Nope, fuel was clean.  |
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Post by teejayexc on Jan 15, 2014 21:52:04 GMT
There isn't a rebuild kit for the carbs AFAIK and the price of replacement O rings will give you sleepless nights. I just used a smear of blue hylomar on the bowl rubbers on re-assembly and there was no leaks. As for a dry tank, as long as you leave it in your warm centrally heated garage, there will be no issues, otherwise just put a 100ml of engine oil in the tank and swill it around to create a coating to prevent corrosion, then swill out with a small amount of petrol before re-fitting. Thanks Clive, I'll wait and see what I find then |
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Post by HRHpenfold on Jan 15, 2014 22:14:55 GMT
OMYDC. I've drained and taken the tank of my bike tonight, with the aim of doing a bit of work on the carbs, more on that later. A thought occured to me, would it have been better to leave a covering of fuel in the tank to stop 'things' drying out completely or d'ya reckon it'll be ok dry? Going to be off the bike for a while whilst I tinker. Now, back to the carbs. Bike runs fine but ever since I took the AIS off it sounds, (only way I can describe it), burblier . Might be that taking the AIS off as altered the fuel/air ratio? Plan to strip the carbs and give 'em a spruce up whilst I'm at it so need the input of the members on this....are most of the bits re-usable, ie 'o' rings and the like or do I need to be looking at some sort of rebuild kit before I start and what are the collective thoughts on altering jet sizes whilst I'm in there? Tia for any, useful, input Just clean them out and refit, nothing new should be needed, never had to replace any jets on a D9, remove the emulsion tubes and make sure they are clean, Screw the mixture screw in until it seats, then out one and a half turns, should be standard, you can screw out a little more to make it run a little richer, You don't need to disconnect the carbs, undo and pull off the stubs, check stubs for cracking, turn the carbs upside down on the cam cover, undo the carb bottom, unscrew jets, simple! |
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Post by teejayexc on Jan 15, 2014 22:21:17 GMT
Just clean them out and refit, nothing new should be needed, never had to replace any jets on a D9, remove the emulsion tubes and make sure they are clean, Screw the mixture screw in until it seats, then out one and a half turns, should be standard, you can screw out a little more to make it run a little richer, You don't need to disconnect the carbs, undo and pull off the stubs, check stubs for cracking, turn the carbs upside down on the cam cover, undo the carb bottom, unscrew jets, simple! Cheers good tips. You say you've never had to replace any jets, but how many have you stripped the AIS off?, d'ya reckon it will have any affect on these? |
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Post by HRHpenfold on Jan 15, 2014 22:31:45 GMT
Just clean them out and refit, nothing new should be needed, never had to replace any jets on a D9, remove the emulsion tubes and make sure they are clean, Screw the mixture screw in until it seats, then out one and a half turns, should be standard, you can screw out a little more to make it run a little richer, You don't need to disconnect the carbs, undo and pull off the stubs, check stubs for cracking, turn the carbs upside down on the cam cover, undo the carb bottom, unscrew jets, simple! Cheers good tips. You say you've never had to replace any jets, but how many have you stripped the AIS off?, d'ya reckon it will have any affect on these? The air induction system has nothing to do with the jetting, it's merely to add air to the exhausts to make them seem cleaner than they would otherwise be! |
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Post by teejayexc on Jan 15, 2014 22:50:09 GMT
The air induction system has nothing to do with the jetting, it's merely to add air to the exhausts to make them seem cleaner than they would otherwise be! Yep I understand that, but, bear with me... If the bike emissions are set at factory, I assume they test exhaust emissions for this?, and the jets are suited to meet the total emissions with the AIS in place, if you then remove the AIS won't the jets theoretically be producing a mixture that's too rich? Ie without the AIS the emissions reading will be higher because of no extra air added? Might be talking bollocks, just saying |
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Post by bobh on Jan 15, 2014 23:53:44 GMT
The air induction system has nothing to do with the jetting, it's merely to add air to the exhausts to make them seem cleaner than they would otherwise be! Yep I understand that, but, bear with me... If the bike emissions are set at factory, I assume they test exhaust emissions for this?, and the jets are suited to meet the total emissions with the AIS in place, if you then remove the AIS won't the jets theoretically be producing a mixture that's too rich? Ie without the AIS the emissions reading will be higher because of no extra air added? Might be talking bollocks, just saying Look at it the other way round. The jets are chosen to give the right mixture for the engine to run properly. But with this set-up on its own the bike wouldn't pass the emissions test, so the AIS is added as an after-bodge to get it through. If you're really worried, just do a plug chop to confirm the mixture is OK. |
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Post by neilmud Lord Protector on Jan 16, 2014 0:48:33 GMT
As for a dry tank, as long as you leave it in your warm centrally heated garage, Where do you think Trev will find one of them? Oh yea I remember & with fitted carpets  Neil |
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Post by HRHpenfold on Jan 16, 2014 8:15:05 GMT
Yep I understand that, but, bear with me... If the bike emissions are set at factory, I assume they test exhaust emissions for this?, and the jets are suited to meet the total emissions with the AIS in place, if you then remove the AIS won't the jets theoretically be producing a mixture that's too rich? Ie without the AIS the emissions reading will be higher because of no extra air added? Might be talking bollocks, just saying Look at it the other way round. The jets are chosen to give the right mixture for the engine to run properly. But with this set-up on its own the bike wouldn't pass the emissions test, so the AIS is added as an after-bodge to get it through. If you're really worried, just do a plug chop to confirm the mixture is OK. that's exactly how it works, the AIS is a cheat to add air into the exhaust to make emissions look lower than the engine is producing! |
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Post by CD on Jan 23, 2014 22:46:22 GMT
AIS dilutes the gunk nothing more.
There are one or two vacuum pipes to the reed valves which need to be capped off otherwise air will get sucked in behind the carbs.
The AIS brackets are handy for carrying a horn away from road spray and salt and relays to get full voltage power to the headlight.
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Post by Deleted on Jan 24, 2014 12:26:45 GMT
You shouldn't need to worry about the tank if you keep it in a warm dry environment. Stripping the carbs should be OK as long as you don't take weeks and let the old O rings/gaskets dry out or disfigure. AIS can be removed with no apparent problem. I didn't think you'd need to ask, who normally does your services for you ?  |
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Post by teejayexc on Jan 24, 2014 13:53:00 GMT
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Post by Deleted on Jan 24, 2014 14:12:05 GMT
read the drivel posted on this forum, you've got to be joking. I was keeping up, I was responding to a CD reprise of an old thread from some old codger who plainly doesn't know his arse from his elbow.  |
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. Might be that taking the AIS off as altered the fuel/air ratio? 
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