GJG
Running lean
Running lean
1982 Yamaha XJ650 Maxim. As you are sitting on the bike, the left three exhaust pipes are bluing at the head and about four inches down the pipes. I have pulled the plugs and those three are white and the other is tan! The guy I bought the bike from said he cleaned the carbs, I am wondering if there is a simple adjustment I can make to richen up those three carbs to stop the bluing? Thanks in advance for any help!! By the way those carbs are Hitachi carbs
GJG
GJG
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poppygene
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From my experience, "clean" is a relative term, and in this case we have no way of determining how good a job he did without opening the carbs back up. There may still be some blockage there. This is almost guaranteed if the bike sat for a long period of time.
You may be able to help it a little by backing out the pilot screws a bit, but maybe not. I have no experience with Hitachis, but likely the pilots will have a cap or plug covering the screws. You'll need to carefully remove these plugs or caps to gain access.
You may be able to help it a little by backing out the pilot screws a bit, but maybe not. I have no experience with Hitachis, but likely the pilots will have a cap or plug covering the screws. You'll need to carefully remove these plugs or caps to gain access.
Let me get this straight... it's one down and four up, right?
[img]http://img93.exs.cx/img93/7837/aread0hm.gif[/img]
[img]http://img93.exs.cx/img93/7837/aread0hm.gif[/img]
Re: Running lean
1982 Maxim 650. Where are the pilot screws to richen up the mixture on the bike?
GJG
THE FUTURE IT'S CLOSER THAN YOU THINK!!!!
GJG
THE FUTURE IT'S CLOSER THAN YOU THINK!!!!
Pilot screws should be THE LAST SCREW you touch. There is pratically no way of adjusting the mixture without some exhaust analyser.
If I were you I'd look for something else first. Is your air filter ok ? Rats have eaten my friend's air filter... which could make your bike run lean (not supposed to, but who knows).
How about a leaky carb intake or outake? You can test if there is something leaking by doing the following test. Buy some Ether and start your engine, start spraying it aroud the intakes and outakes, if there is something leaking your engine will stall or close to it because your fuel/air mixture will change.
Are your spark plugs ok ? Verify the gap and that they are the good model required by the manufacturer. My local hardware store was selling me the spark plugs for the UK model. They both fit but one has a higher heat then the other. If you are really game you could change your current spark plugs to a higher heat range spark plug, this could patch the problem. If my memory is right, when there is too much air you need to raise temp.
Good luck
BeerBaron
If I were you I'd look for something else first. Is your air filter ok ? Rats have eaten my friend's air filter... which could make your bike run lean (not supposed to, but who knows).
How about a leaky carb intake or outake? You can test if there is something leaking by doing the following test. Buy some Ether and start your engine, start spraying it aroud the intakes and outakes, if there is something leaking your engine will stall or close to it because your fuel/air mixture will change.
Are your spark plugs ok ? Verify the gap and that they are the good model required by the manufacturer. My local hardware store was selling me the spark plugs for the UK model. They both fit but one has a higher heat then the other. If you are really game you could change your current spark plugs to a higher heat range spark plug, this could patch the problem. If my memory is right, when there is too much air you need to raise temp.
Good luck
BeerBaron