Question about Yamaha Motorcycles

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Symptoms of bad cdi igniter 1985 yamaha xj700 maxim

Starts and will run on 2 cylinders sometimes 3 and 4 and other times 1and 2 coil wires are correct primary coil 1 and 4 and secondary coil 2 and 3 . sometimes will backfire when trying to start. plugs look like running very rich . carbs are rebuilt and seem perfect . seems like weak spark could this be cdi ignitor problem . checked resistance in pickup coil, rectifier,and stator everything seems fine there.battery is new ,fuses all good. thanks for any help and time you can give me,Roland

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Hey Roland,
I have the same problem. How did you fix this problem? Was it the Ignitor or the Rectifier? Please let me know. Thanks.

Posted on Apr 07, 2013

  • Sean W Apr 07, 2013

    Hey Roland,
    I have the same problem. How did you fix this problem? Was it the Ignitor or the Rectifier? Please let me know. Thanks.

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Posted on Jan 02, 2017

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Anonymous

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SOURCE: My 1985 Yamaha V Max in not firing on the front

check all earthing connections on the ignition system and in fact on the whole cycle. A loose or dirty connection may be the cause.

Posted on Sep 17, 2009

Anonymous

  • 1 Answer

SOURCE: 1983 honda GL1100I, New spark plugs, good

When I recently ordered parts from Saber Cycle, they included a piece of information that pertained to my motorcycle, which is also a 1983 Honda Goldwing GL1100 Interstate. Here is what it says, I hope this helps:

Air Cut-Off Valve

The air cut-off valve is an extremely important part of the fuel/air intake system that is frequently missed even my competent mechanics, most of whom are not even aware of its existence or how it functions.

Every GL1000 has one, located in the air intake tube, between the air cleaner box and the manifold. Every GL1100 has four, located in the top air intake passage of each carburetor, and every GL1200 has one located in the plenum box below the air cleaner box similar to the GL1000.

These valves are "air blockers", along with the carburetor o-rings, serving to restrict air flow and increase the fuel/air mixture ratio when the carb slides are in the lower RPM range, up to closed so that the machine will start and idle smoothly with virtually no choking and accelerate rapidly, with no stumble or hesitation.

When typical starting requires heavy and prolonged choking to keep the bike running, when stalling and hesitation occurs even while "warmed up" and when backfiring pops while the throttle is shut off while cruising, most people will start fooling with the air screws to try to overcome the problem, only making it worse along with reducing their gas mileage.

Running with dysfunctional air cut-off valves can causes severe engine damage or failure. When the valves are dysfunctional, the engine pulls nearly total air in the low RPM range through the carbs and on to the combustion chamber. The fuel/air ratio is extremely poor with pre-ignition long before the normal 38 to 40 degree firing point, generating an enormous amount of heat, with no power, which is trapped a longer period of time in the cylinder before the exhaust valve opens.

This heat goes mostly up through the cylinder head, gradually incinerating the head gaskets and allowing engine coolant (anti-freeze) to seep into the engine. You can easily spot when you are in trouble by a puff of bluish-white or white smoke on first starting the engine. Don't leave it alone. Change head gaskets immediately or you could take out your bottom end bearings, ruining the engine.

For those of you installing new exhaust systems, you will discolor your headpipes, either blue (lean state) or gold (rich state). You can destain your pipes using "blueaway" or "blue-off" but be careful not to rub the chrome, just dab gently.k These compounds are usually purchased at a Harley dealer or Harley oriented aftermarket shop.

Honda genuine pipes, like many Yamaha pipes, have a double wall for a portion of the headpipe which masks this discoloration-but also masks a bad state of tune. Even if your pipes are original and still in good shape, don't think that you are OK if the bike has any or all of the dysfunctional air cut-off valve running and performance characteristics.

If your 1975 to 1987 Gold Wing is not getting 50-58 miles per gallon (20-23 KM/Liter), you have one of the most obvious signs of trouble. It is likely your air screws have been backed out to try overcome the effects of the poor running, stumbling, starting and stalling and quitting.

Resynchronize all four carbs to the #3 carb vacuum level using mercury carb sticks or vacuum dial gauges. Stay with strict use of the setting levels in either the Honda, Clymer or Haynes manuals. Do not attempt to tune any other way! Guessing will not work and can cause considerable engine damage!!!

Posted on Sep 26, 2009

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Hi, Treverlehigh and the usual suspects are:
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Feb 10, 2011 | 1985 Yamaha XJ 700 X Maxim

1 Answer

I have a 1985 xv700 virago. one of my plugs are misfiring. I had issues with my original one. yamaha dealer told me i needed a new cdi box. He sold me a used cdi igniter box from a non running 1985 Yamaha...


follow the plug wire back to the coil and see if there are any breaks, if not might switch coil with the other one and see if the other plug now misfires, if so replace the coil, most cdi problems are not intermittent, typically they either work, or they dont.

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2 Answers

1985 Yamaha XJ700 Maxim won't work


All engines need the same three to four things to work correctly..
Compression, Fuel, Spark, (timing).... But, usually those bikes, have fuel issues. The fuel tank spigot has a vacuum controlled valve which when the engine is cranked, suction is applied and fuel then can flow. Second,, the needle and float in the carb tend to get gummed up along with the main and idle jet... You need to make sure the carb is maticulously clean, Using carb cleaner, and tag wire,, or a piece of fine wire ( be careful not to enlarge the tiny holes). Keep refering to the 3-4 list fuel, compression, Spark,,,timing.....
Good luck...!!
Rib

Feb 24, 2009 | 1985 Yamaha XJ 700 X Maxim

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