Hello Guest User,

Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.

To access these 'Registered Users Only' areas simply register and login.

New troubles

Need help restoring, building, or finding then try here.

Moderators: KeithZ1R, chrisu, paul doran, Taffus

Message
Author
User avatar
Blackfox
Regular Poster
Posts: 40
Joined: 14th Jun 2011

New troubles

#1 PostAuthor: Blackfox » Mon Aug 08, 2011 3:53 pm

Ok i got my new harness in with the new switches and the new rectifier combo unit bikes starts great rev's great . But as soon as it starts to get warm it will not rev' It will idle but you go to give it gas just drops dead .


I know the timing is dead spot on and the carbs are dead spot on and the compression is great and the battery is brand new


My suspect is the Dyna coils
Fox

User avatar
Pigford
Hardcore
Hardcore
Posts: 13314
Joined: 2nd Jan 2006
Location: North Dorset

#2 PostAuthor: Pigford » Mon Aug 08, 2011 3:58 pm

Get yer multimeter out then.

The DYNATEK site has details how to check it out :wink:
And on the 7th day... Zeds were created!

User avatar
Blackfox
Regular Poster
Posts: 40
Joined: 14th Jun 2011

#3 PostAuthor: Blackfox » Mon Aug 08, 2011 4:05 pm

Yes i am going to have to test them out but is there a way i can get them hot to check them out other than running it and having to strip it down real fast :?:

Because i want to test them cold and hot just to be on the safe side i know they are old coils i think they where bought when Dyna first started to sell them
Fox

User avatar
KeithZ1R
Moderator
Posts: 3368
Joined: 15th May 2005
Location: Bury

#4 PostAuthor: KeithZ1R » Mon Aug 08, 2011 4:20 pm

Classic Hall effect breakdown you need optical sensors thier not affected by heat
Keith
:bop :gom

You can never have too many tools in your life, except the two legged variety

I'm never wrong, once I thought I was but I was
mistaken.

Phil Churchett winner 2013

User avatar
Pigford
Hardcore
Hardcore
Posts: 13314
Joined: 2nd Jan 2006
Location: North Dorset

#5 PostAuthor: Pigford » Mon Aug 08, 2011 4:24 pm

KeithZ1R wrote:Classic Hall effect breakdown you need optical sensors thier not affected by heat



Optical sensors (aka: Pirhana/Newtronics) are defo not as good :evil:
And on the 7th day... Zeds were created!

User avatar
PAULJAC47
Hardcore
Hardcore
Posts: 3266
Joined: 31st Aug 2008
Location: WOLVO WEST MIDS ENGLAND

#6 PostAuthor: PAULJAC47 » Mon Aug 08, 2011 4:30 pm

Fox, seems strange for both coils to fail at same time and only when you give it gas?...If it is the coils breaking down when they get hot jury rig up a temp gas supply and run the bike till it gets hot,run a household cooling fan onto the coils and see if it cuts out then!
Other thought when you set up the Dyna did you time ingition dynamically with a strobe?....be interested to see how this goes..Paul J
PAULJAC47,,,,,"She may not look like much, but she's got it where it counts, kid."
-Han Solo

You can't polish a turd, but you can roll it in glitter

Salad is what real food eats.
Anon

PUM 673

User avatar
Blackfox
Regular Poster
Posts: 40
Joined: 14th Jun 2011

#7 PostAuthor: Blackfox » Mon Aug 08, 2011 4:43 pm

PAULJAC47 wrote:Fox, seems strange for both coils to fail at same time and only when you give it gas?...If it is the coils breaking down when they get hot jury rig up a temp gas supply and run the bike till it gets hot,run a household cooling fan onto the coils and see if it cuts out then!
Other thought when you set up the Dyna did you time ingition dynamically with a strobe?....be interested to see how this goes..Paul J



Paul i did set it up with a strobe and the battery was my boats so it was not ran on the bikes power . I have a gas tank form my john boat that will work and i have a good fan i will give it a shot i just need to find a tee at the auto-parts store to hook the gas feeds up on .
Fox

User avatar
Blackfox
Regular Poster
Posts: 40
Joined: 14th Jun 2011

#8 PostAuthor: Blackfox » Tue Aug 09, 2011 12:59 am

Image

Ok this is my primary test i used two multimeter s on the coils and both of them where at 3.5 on my good one and 3.8 on the cheap one


Image



Now my secondary test would not work on either coil the meter was set on 200k and i got nothing on both of the coils


Image



Image


I have not run a hot test because with no reading on the secondary test at all i am :??

Input needed and a cold one two coils same thing :shock:
Fox

User avatar
Al
Hardcore
Hardcore
Posts: 2233
Joined: 21st Oct 2007
Location: Farnbronx Sin City N.E. Hants

#9 PostAuthor: Al » Tue Aug 09, 2011 7:45 am

This may help Fox. They do look very old versions of green coils. What is the date stamp on them? Its the short code date format ; month and year.

Any signs of darkening inside the green body, either track lines or just dark patches. Cracks in the insulation are another giveaway.

Image
Image


AL
1981 J1

User avatar
PAULJAC47
Hardcore
Hardcore
Posts: 3266
Joined: 31st Aug 2008
Location: WOLVO WEST MIDS ENGLAND

#10 PostAuthor: PAULJAC47 » Tue Aug 09, 2011 11:27 am

Fox, hard to tell from pics but are you checking secondary coils resistance between the two ht outputs to the plugs? Paul J
PAULJAC47,,,,,"She may not look like much, but she's got it where it counts, kid."

-Han Solo



You can't polish a turd, but you can roll it in glitter



Salad is what real food eats.

Anon



PUM 673

User avatar
Blackfox
Regular Poster
Posts: 40
Joined: 14th Jun 2011

#11 PostAuthor: Blackfox » Tue Aug 09, 2011 11:37 am

Yes Paul i am pulling it from the neg coil side where the trigger is to the spark plug high tension leads both sides and get nothing :??



the coil dates read 3/80


I took the old lady's hair drier and heated the coils up with it and pulled readings on them warm still no readings on the high tension leads on both coils
Fox

User avatar
Pigford
Hardcore
Hardcore
Posts: 13314
Joined: 2nd Jan 2006
Location: North Dorset

#12 PostAuthor: Pigford » Tue Aug 09, 2011 11:39 am

Blackfox wrote:Yes Paul i am pulling it from the neg coil side where the trigger is to the spark plug high tension leads both sides and get nothing :??



the coil dates read 3/80


I took the old lady's hair drier and heated the coils up with it and pulled readings on them warm still no readings on the high tension leads on both coils


Shouldn't you check HT - pole to pole (thru both HT lead connections :?:
And on the 7th day... Zeds were created!

User avatar
PAULJAC47
Hardcore
Hardcore
Posts: 3266
Joined: 31st Aug 2008
Location: WOLVO WEST MIDS ENGLAND

#13 PostAuthor: PAULJAC47 » Tue Aug 09, 2011 11:43 am

Pigford wrote:
Blackfox wrote:Yes Paul i am pulling it from the neg coil side where the trigger is to the spark plug high tension leads both sides and get nothing :??



the coil dates read 3/80


I took the old lady's hair drier and heated the coils up with it and pulled readings on them warm still no readings on the high tension leads on both coils


Shouldn't you check HT - pole to pole (thru both HT lead connections :?:

As Mark says fox you should ne checking resistance between the two ht leads with the plug caps on
PAULJAC47,,,,,"She may not look like much, but she's got it where it counts, kid."

-Han Solo



You can't polish a turd, but you can roll it in glitter



Salad is what real food eats.

Anon



PUM 673

User avatar
Blackfox
Regular Poster
Posts: 40
Joined: 14th Jun 2011

#14 PostAuthor: Blackfox » Tue Aug 09, 2011 12:12 pm

Ok i will check it that away i was doing it just like a car coil test like it said in my book

Image
Fox

User avatar
PAULJAC47
Hardcore
Hardcore
Posts: 3266
Joined: 31st Aug 2008
Location: WOLVO WEST MIDS ENGLAND

#15 PostAuthor: PAULJAC47 » Tue Aug 09, 2011 12:26 pm

Yes thats correct for a car coil as in essence it is like a single cylinder bike one,!! Paul J..ps if you still get incorrect readings take off the plug caps and check through wires only i have had the plug caps fail more than once!
PAULJAC47,,,,,"She may not look like much, but she's got it where it counts, kid."

-Han Solo



You can't polish a turd, but you can roll it in glitter



Salad is what real food eats.

Anon



PUM 673


Return to “Bike Help”

Who is online

Users browsing this forum: No registered users and 13 guests