Motorcycle

Motorcycle Questions? Ask a Mechanic.

Ask an Expert,
Get an Answer ASAP!

Motorcycle
This answer was rated:

1985 shadow, v-twin 11oo starts, runs on front cyl. pulled

1985 shadow, v-twin 11oo...
1985 shadow, v-twin 11oo starts, runs on front cyl. pulled plugs, ground tested, fired hot blue spark.reinstalled. put timing light on spark plug lead both sides rear cyl. no fire. runs on front cyl. only. unplugged cam spark generator, wont crank. reconnect cam spark generator cranks and runs on front cyl. when I pulled plugs in rear cyl. they were cold and wet with gas, so I know it is getting gas whats next?
Show More
Show Less
Ask Your Own Motorcycle Question
Answered in 1 hour by:
9/26/2013
TIMOTO
TIMOTO, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 1,468
Experience: Honda registered technician, silver level award, former Kawasaki/Suzuki tech, 40+ years exp.
Verified

TIMOTO :

Hello, my name is XXXXX XXXXX I will assist you.

TIMOTO :

The most common failure on this model is the ignition pulse generator. It is located inside the right crankcase cover. Here is a link to a parts diagram for reference: http://partsfinder.onlinemicrofiche.com/wps/showmodel.asp?Type=13&make=hondamc&a=44&b=12&c=0&d=-IGNITION-PULSE-GENERATOR The pulse generator is part #2.

TIMOTO :

There are two of them inside the engine. They signal the ignition control unit when to fire the plugs on each cylinder.

TIMOTO :

You will need a multimeter to check them. They should show a couple of hundred ohms of resistance across each coil and they should have no contunity on either wire to ground.

TIMOTO :

They should also show a pulse of about 0.25 volts ac when the ignition is on and the engine is being cranked with the electric starter.

Customer:

why does the coil fire the plug when grounded, but not in head?

TIMOTO :

Have yoy installed a new set of NGK sparkplugs in the rear cylinder ?

TIMOTO :

Or have you swapped the front cylinder spark plugs to the rear?

Customer:

I moved frt to rear, also checked plugs for firing on frt coil all four plugs are new

TIMOTO :

Have you checked compression on both cylinders?

Customer:

no, I haave a compression gage but need an aadapter for meteric threads

TIMOTO :

If the compression numbers are about the same on both cylinders then the next thing to check is the carburetors and fuel system. What is the history of the problem? Was any work performed on the bike prior to the onset of the problem?

Customer:

No work, the bike sat idle for about 6mos. before I got it. I checked the carbs for obstruction and vaccume leaks

Customer:

aand rear plugs show wet with gas when I pull them

TIMOTO :

If the rear cylinder is getting too much fuel it can foul the plugs and prevent them from firing. The most likely cause is dirt, rust or old fuel varnish built up on the float needle valve and seat or the choke enrichner is sticking on.

TIMOTO :

If you need further assistance with this or have additional information to provide just add a reply and I will respond tomorrow morning.

Customer:

that's possible, I rained tank and carbs, put fresh gas in, but did not pull carbs, chock is stiff, not smooth, but if I put timing light on plug lead from coil it want light on rear coil but will on front coil. let me check choke cables and do compression test and resistance test and then get back to you. can I contact you next time or will I get someone else? You have been very helpful

TIMOTO
TIMOTO, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 1,468
Experience: Honda registered technician, silver level award, former Kawasaki/Suzuki tech, 40+ years exp.
Verified
TIMOTO and 87 other Motorcycle Specialists are ready to help you
Ask your own question now
Ask TIMOTO Your Own Question
TIMOTO
TIMOTO
TIMOTO, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 1,468
1,468 Satisfied Customers
Experience: Honda registered technician, silver level award, former Kawasaki/Suzuki tech, 40+ years exp.

TIMOTO is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Jeff Policky

Jeff Policky

Motorcycle Mechanic

2,425 satisfied customers

Yamaha Gold, Suzuki Gold, Honda Bronze, Polaris Bronze, BRP

Louie

Louie

Technician

1,281 satisfied customers

25+ yrs. experience

TIMOTO

TIMOTO

Motorcycle Mechanic

1,468 satisfied customers

Honda registered technician, silver level award, former Kawasaki/Suzuki tech, 40+ years exp.

Andre Pilon

Andre Pilon

Motorcycle Mechanic

1,032 satisfied customers

Over 25 years experience, ICS, MMI, Owned shop for 12 years, worked tech-support for Harley Davidson

Kenny O.

Kenny O.

Motorcycle, ATV, Mules, Side by Side's Product Specialist. All Brands

619 satisfied customers

Worked for Kawasaki Motors as a Product Support Specialist (Factory Support) for 24 years

asphaltcycles

asphaltcycles

Motorcycle Mechanic

458 satisfied customers

I operate a motorcycle dealership and CCS Ducati Race team.

Glenn Adams II

Glenn Adams II

Motorcycle/ATV Technician

393 satisfied customers

6 years Motorcycle/ATV/Water Craft; 4 years auto; 18 years carpenter

< Previous | Next >

Related Motorcycle Questions
I have a 1992 FXR that I have just fitted a Revolution 85
Hi, I have a 1992 FXR that I have just fitted a Revolution 85 cube bolt on kit to as well as an ev27 Andrews cam and new performance lifters with a new steel cam chest breather. All clearances are cor… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,997 satisfied customers
Honda Nss250S Headlights fine, but when I switch to dip,
Honda Nss250S Headlights fine, but when I switch to dip, nothing happens and the headlights stay on. Their are only 2 wires into the switch. Surely their should be 3 ? Any advice would be most welcome… read more
Louie
Louie
Technician
Associate Degree
1,281 satisfied customers
My bike won't start. The starter motor is turning the engine
My bike won't start. The starter motor is turning the engine but it just won't fire. All electronics are working fine and I've had the battery tested. I rode the bike to work all good, left it for 2 h… read more
Louie
Louie
Technician
Associate Degree
1,281 satisfied customers
I have a 1991 vmax yamaha 1200. So there is no power on the
I have a 1991 vmax yamaha 1200. So there is no power on the spark plug. But it turn over normally. … read more
Louie
Louie
Technician
Associate Degree
1,281 satisfied customers
I replaced the starter & now no spark. It wasd running finr
I replaced the starter & now no spark. It wasd running finr before. … read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,997 satisfied customers
Got a 96 Fxdwg that I am doing a ground up resto on it has
Got a 96 Fxdwg that I am doing a ground up resto on it has the stock tranny but when I built the motor i had to replace to lowerend with S&S cases and oil pump question is where do all the oil lines g… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,997 satisfied customers
I'm looking the new 2018 Kymco xcting 400i scooter. I'm 5'6"
I'm looking the new 2018 Kymco xcting 400i scooter. I'm 5'6" tall so I need to lower it. Can it be done, and what Shocks and how can I go. Thanks,Dane … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 1970 Rupp Sprint and have to replace the track.
I have a 1970 Rupp Sprint and have to replace the track. What is the proceedure? … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
How to open a jam seat when the does not work. It is a 2016
No the brakes have not been squeaking and I have check the fluid level … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
For 2004 harley night train the turn signals on left not
Hello, for 2004 harley night train the turn signals on left not working,left side rear was working., now its not working, front running lights are working.only turn signal on front left side working. … read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,997 satisfied customers
The check engine light is on. How can I find out what is
The check engine light is on. How can I find out what is wrong without taking it to a dealership? … read more
Kavey
Kavey
86 satisfied customers
How can I open the seat of my 2014 Yamaha Zuma without a
How can I open the seat of my 2014 Yamaha Zuma without a key. The key is locked in the seat! … read more
Kavey
Kavey
86 satisfied customers
I own a 2009 fatbob dyna and I have just put 14 inch bars,
my name is ***** ***** I own a 2009 fatbob dyna and I have just put 14 inch bars , new wiring , switches , hand controls , braided throttle and clutch cables but when it was time to fire it up I had n… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,997 satisfied customers
I have a 2006 Honda Rancher TE and wanted to see if someone
I have a 2006 Honda Rancher TE and wanted to see if someone could answer a question regarding lining up the cam shaft marks on crankshaft lobes ( that may not be what they are called exactly. Accordin… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My son's LT50 started giving starting problems. I removed
Hi, my son's LT50 started giving starting problems. I removed the carb, cleaned it out. Was very dirty. New sparkplug etc. Now I can't get itstarted at all. Tried the priming and flooded piston. It's … read more
Louie
Louie
Technician
Associate Degree
1,281 satisfied customers
I have a 1985 h-d fxsb headlights dim when throttled up an
I have a 1985 h-d fxsb headlights dim when throttled up an brighten when I let off throttle… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,997 satisfied customers
MY1998KALASAKI VOLCAN 1500 IS GITING BAD GAS MILEAGE. A
MY1998KALASAKI VOLCAN 1500 IS GITING BAD GAS MILEAGE … read more
Pete
Pete
Mechanic
Construction, Plant Fitter
57 satisfied customers
Will a 1995 GL 1500 Gold Wing engine that didn't come with
Will a 1995 GL 1500 Gold Wing engine that didn't come with reverse, be able to swap out to a 1995 GL 1500 Gold Wing that has reverse?… read more
Eric
Eric
technician
Vocational, Technical or Trade Scho
1,566 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x