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Re: How do you sync the carbs on a 1996 1400 intruder?...
How many carburtors does yr bike have?
Let me explain you as to how it is done in a Yamaha Seca XJ750A.
I have four carburators in my bike and the # 3 is factory set so all one has to do is set the rest to the # 3.You have to fully open the idling screw thn use a feeler gauge 0.15mm feel it to the # 3 nd thn adjust the rest to let the feeler blade 0.15mm to pass under the butterfly of the rest of the carburators.
Hope this answers yr question!
Visit this site we also have a column for other models prolly you may get someone there who has the same type of bike as yours!..www.xjbikes.com
Knight ( Yamaha Seca XJ750A 1981)
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The thing that will make your pipes turn red while running (usually under load) is your carbs being dirty and the bike is running way to lean. getting to much air and not enough fuel. if it was running rich to much fuel the bike would sputter and backfire and foul plugs. if you keep running it like that you will likely blow a hole through the piston or the head gasket. you most likely need a carb clean and sync.
if the bike was sitting and not stored (fuel drained and cylinders fogged) there is probably sludge in the carbs. a carb clean is not something for a novice. its easier to pay a shop to clean and sync them. not cheap but almost always the better way to go if you do not have carb experience.
The clutch going out is a separate issue. if the clutch does not engage at all when you release the clutch lever then that could be a failure of the clutch basket or the springs that push the plates together. the clutch is under the right side cover near your right foot. if the clutch is grabbing but slipping it is worn clutch plates and springs and can be repaired with a clutch rebuild kit.
either way you end up taking off the clutch cover. not a hard job if you are handy. rebuild kits come with instructions.
the mixture screw is underside of carb,if its between cylinder and front side of carb its fuel/air,to lean turn screw clockwise,if its between backside of carb and air box/filter,its air/fuel,turn screw counter clockwise to lean,adjust with 1/8 turn at a time.
Did you sync the two carbs? If not the rear may be getting all the gas from the rear carb and none to the front. Twist throttle engine off and see if front carb cable is pulling the carb open. Also unscrew the spark plug boot from the front spark plug wire and trim 1/8th inch off the wire and screw the boot back in. The plug wire end may be corroded on that wire.
when the shop rebuilt the carbs did they reinstall the carbs on the bike?it sounds to me like the rear cylinder is running very rich,the carbs will need to be set up with the mixtures and balance done,this is not expensive to do and is critical to the good performance of the bike,most reputable bike shops will be able to do this,hope this helps
it is probably not a weak spark. if you are determing this because the plug is sooting up and fouling and or the bike is missing or just not running right. your carbs need rebuilt. know of same problem with friends bike. tried eveything. coils igniter etc.. check out g man industries.com give them a call they will explain what is going on with your bike