Question about Yamaha XJ 650 Motorcycles

1 Answer

My 1982 xj 550 was starting to sputter real bad under hot conditions, and did this periodically for a couple months, now it will start cold and run, but when i drive it it will sputter hard and die within blocks. I believe I have a coil problem, but dont have a clue what resistance the coils are to buy aftermarket, and i am not wanting to pay $400 for factory coils. any idea, may be worth mentioning that acouple of years ago the previous owner told me he took some sort of resistors out of the spark plug leads? I have no idea as i never saw them

Posted by on

  • scott mckee Sep 17, 2010

    Thanks, I will do that, unfortunately the resistance value given to me by the after market makers is either 3.0 or 5.0ohm and they cant tell me what my bike needs. I ordered a clymer manual for my bike today so I hope that tells me as well. I just dont want to fry out the rest of my ignition system putting in the wrong stuff.

  • scott mckee Sep 17, 2010

    Thanks that is the confirmation I needed

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 642 Answers

Paying $400 for a coil is absolutely ridiculous unles you want to do a concourse restoration. You can buy a complete high output ignition set with CDI unit for $250!
Coil input should be in the region of 2.5ohm and output in the region of 11k ohm with connectors removed. The "resistors" that were removed are in the plug connector and helps with cancelling radio interference and limiting current draw through the secondary windings of the coil. High current draw = high wattage = heat = failed coil. Put them back, they're not that expensive. Something like $3.

Posted on Sep 16, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 91 accord has been giving me grief 4 months. Sure would appreciate any help - TX GREASEMONKEY, u have been on the mark b4, want to take a shot... Its my only transportation and has been down 4 a month....


When you say you have fuel, do you have normal fuel pressure at the injectors ? Because Honda cars are known for faulty fuel pump relays.
The relay stops powering the pump when it gets hot but will start back up when the relay cools off.

Jul 25, 2014 | Cars & Trucks

2 Answers

My 91 accord has been giving me grief 4 months. Sure would appreciate any help - TX GREASEMONKEY, u have been on the mark b4, want to take a shot... Its my only transportation and has been down 4 a month....


This is a long shot, but maybe the fuel pump relay or pump is shutting down when it gets hot. It sounds like a fuel problem to me. Good-Day! Hope this helps! also check and or replace fuel filter, and air filter.

Jul 25, 2014 | 1991 Honda Accord

1 Answer

2000 nissan xterra was barley running yesterday missing and sputtering took forever to get up to speed and this morning it is running fine what could this be


Sometimes the computer will have an intermittant glitch. Wait to see if problem reoccurs and monitor it based on engine start-up/run conditions. ( I. E.) Hot, Cold, Under A Load, Idling, Cruising.

Nov 14, 2013 | 2000 Nissan Xterra

1 Answer

1982 yamaha maxim 400 will start, run for about a minute, then shut off. It wont re-start until i turn the key off and back on, then it starts right up, to repeat the problem.


Yes depending on the load just because you have water in the battery doesn't mean you don't have a shorted out cell in it. too much, and a spike or short in voltage will shut it down. a battery will only last you under good conditions on a bike will be 12 months. don't be a cheapskate get the battery checked and get you a manual for this bike it will help you in the long run. otherwise it sounds good. Also coils get hot and quit when they get hot and run when they cool. See a manual will help you troubleshoot it.

Sep 03, 2012 | 1982 Yamaha XS 400

1 Answer

I have a 1982 yahama 650 hard to start cold if you spray carb cleaner on a rag & cover the intake it will start & run. But you can crank & crank otherwise. It fires & runs for 10 to 15 secs...


There were a couple of different carbs fitted to this era of bike. One of them has a diaphramme that works a 'fuel pump' system and floods the carb as the throttle is opened. They will split and cause problems.

Mar 06, 2011 | 1982 Yamaha XJ 650

3 Answers

My 1982 yamaha xz 550 vision keeps sputtering, whats the problem? example, i start in first gear, and as im accelerating the bike seems to jurk forward and sputter, could that mean there bad fuel...


This could also be caused by a faulty plug cap or coil.

Seeing that the coils are much easier to test than the carbys are to remove,strip,clean,re-fit,adjust mixtures & syncronize,I suggest you start there. (see my tip on how to test motorcycle twin coils-in tips & tricks).

Just to get an idea what is going in you could also try & remove both spark plugs & compare them to each other.
Is one black & sooty? - too rich- poor combustion
Is one oily?-- not firing or mechanical problem
Hope this helps
Regards Andrew

Jul 16, 2010 | 1982 Yamaha XZ 550

1 Answer

I have a 1982 XJ750, and wont start. Once started runs well.


try to get a warmer spark plug and you may find that it will start better . the Yamaha have been hard to start and the only way to really start them up in winter or colder weather is to replace the plug by a warmer one . Do not go too hot as you may burn a hole in the pistons .

Sep 26, 2009 | 1981 Yamaha XJ 650

1 Answer

1981 550 to 650 engine swap


the only thing you could possibly do is change out your swing arm off the 650 and put it on the 550 but you may also have to change out the wiring harness as well to get the 650 running properly

Jun 08, 2009 | 1982 Yamaha XJ 650

3 Answers

Car starts hard and runs rough in cold weather, undrivable


The correct spark plugs are very important. Glad to hear you got it fixed good.

Dec 13, 2008 | 1994 Toyota Camry

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

63 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...