Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Hendi Kaf, in Cambodia

I haven't been everywhere...
but it's on my list!


Photo by Hendi Kaf,
in Cambodia



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 25 Jun 2015
Registered Users
Veteran HUBBer
 
Join Date: Jun 2008
Location: yorkshire england
Posts: 201
resister caps

hi there guys im having some ignition problems with my 1985 43f , i think its the ignition switch so going to get a new one, while checking things the plug is a NGK DPR8EA-9 but the NGK plug cap has no markings to say it is a resister cap will check this with a ohms meter , do i need a resister cap and a resister plug , each has 5k ohms (5000) so both would be 10,000 ohms . so is 5k ohms ok or do i need 10k . from what i know the more ohms resistance the weaker the spark , but i have just fitted a new aftermarket cdi to a suzuki gsf 400 bandit and the leaflet seid both cap and plug MUST be supressed to protect the cdi . your views on the matter guys , the plug cap i dont think is my ignition problem but am going to fit a new one . zigzag

Last edited by zigzag; 25 Jun 2015 at 16:15. Reason: extra word
Reply With Quote
  #2  
Old 25 Jun 2015
awolxt's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Apr 2011
Location: wirral
Posts: 270
Hi zigzag.

I bought an ngk plug cap with 5k resistance. I didnt realise it at the the time it was 5k .( The original on mine was 10.5k)I fitted it and it did work. (Started and ran okay) i didnt leave it on though as it wasnt the cause of my problems so i refitted the oem one. I should say mine is a 4pt 2003 model

Bill
Reply With Quote
  #3  
Old 25 Jun 2015
Registered Users
Veteran HUBBer
 
Join Date: Apr 2005
Location: Oxford UK
Posts: 2,116
I always understood either cap or plug (or leads) but not both, and certainly not all three. I stand to be corrected but put resister plugs in one of my bikes with resister caps and it misfires to the point where it hardly runs.
Reply With Quote
  #4  
Old 26 Jun 2015
Registered Users
Veteran HUBBer
 
Join Date: Jun 2008
Location: yorkshire england
Posts: 201
hi guys ive measuered the old cap and strangly got 5800 ohms although its a 5k cap . i had a new one in my xt box of bits this one is 4800 not 5k so i fitted this so will see how things go , like i seid the cap is not part of my running problems but a new one can only help , thanks for your comments guys zigzag
Reply With Quote
  #5  
Old 28 Jul 2015
Registered Users
New on the HUBB
 
Join Date: Jul 2015
Posts: 4
"lectric!"

resistance in series is additive, E or volts divided by Resistance equals Amps.
Reply With Quote
  #6  
Old 29 Jul 2015
Registered Users
Veteran HUBBer
 
Join Date: Feb 2012
Location: Milan, Italy
Posts: 613
without getting too deep into physics, lets just say that coil/resistance circuits behave diferently than a plain resitance circuit.... apples and oranges really, I=V/R applies only to a degree... voltage rise and spark duration (time wise) are much more improtant than absolute current.

in more practical terms, modern systems are designed to run 10-15K ohms resistance, i.e. R plugs + 5-10k ohm caps.

there's a good chance to get more misfries form running with 0 ohns caps rather than 5-10K, as spark duration gets shorter, so more hit and miss ign.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Waterproof plug caps theoneandonlymin Yamaha Tech 1 17 Feb 2014 20:13

 
 

Announcements

Thinking about traveling? Not sure about the whole thing? Watch the HU Achievable Dream Video Trailers and then get ALL the information you need to get inspired and learn how to travel anywhere in the world!

Have YOU ever wondered who has ridden around the world? We did too - and now here's the list of Circumnavigators!
Check it out now
, and add your information if we didn't find you.

Next HU Eventscalendar

25 years of HU Events
Be sure to join us for this huge milestone!

ALL Dates subject to change.

2025 Confirmed Events:

Virginia: April 24-27
Queensland is back! May 2-5
Ecuador June 13-15
Germany Summer: May 29-June 1
CanWest: July 10-13
Switzerland: Date TBC
Ecuador: Date TBC
Romania: Date TBC
Austria: Sept. 11-14
California: September 18-21
France: September 19-21
Germany Autumn: Oct 30-Nov 2

Add yourself to the Updates List for each event!

Questions about an event? Ask here

See all event details

 
World's most listened to Adventure Motorbike Show!
Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...

Adventurous Bikers – We've got all your Hygiene & Protection needs SORTED! Powdered Hair & Body Wash, Moisturising Cream Insect Repellent, and Moisturising Cream Sunscreen SPF50. ESSENTIAL | CONVENIENT | FUNCTIONAL.

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

"Ultimate global guide for red-blooded bikers planning overseas exploration. Covers choice & preparation of best bike, shipping overseas, baggage design, riding techniques, travel health, visas, documentation, safety and useful addresses." Recommended. (Grant)



Ripcord Rescue Travel Insurance.

Ripcord Rescue Travel Insurance™ combines into a single integrated program the best evacuation and rescue with the premier travel insurance coverages designed for adventurers.

Led by special operations veterans, Stanford Medicine affiliated physicians, paramedics and other travel experts, Ripcord is perfect for adventure seekers, climbers, skiers, sports enthusiasts, hunters, international travelers, humanitarian efforts, expeditions and more.

Ripcord travel protection is now available for ALL nationalities, and travel is covered on motorcycles of all sizes!


 

What others say about HU...

"This site is the BIBLE for international bike travelers." Greg, Australia

"Thank you! The web site, The travels, The insight, The inspiration, Everything, just thanks." Colin, UK

"My friend and I are planning a trip from Singapore to England... We found (the HU) site invaluable as an aid to planning and have based a lot of our purchases (bikes, riding gear, etc.) on what we have learned from this site." Phil, Australia

"I for one always had an adventurous spirit, but you and Susan lit the fire for my trip and I'll be forever grateful for what you two do to inspire others to just do it." Brent, USA

"Your website is a mecca of valuable information and the (video) series is informative, entertaining, and inspiring!" Jennifer, Canada

"Your worldwide organisation and events are the Go To places to for all serious touring and aspiring touring bikers." Trevor, South Africa

"This is the answer to all my questions." Haydn, Australia

"Keep going the excellent work you are doing for Horizons Unlimited - I love it!" Thomas, Germany

Lots more comments here!



Five books by Graham Field!

Diaries of a compulsive traveller
by Graham Field
Book, eBook, Audiobook

"A compelling, honest, inspiring and entertaining writing style with a built-in feel-good factor" Get them NOW from the authors' website and Amazon.com, Amazon.ca, Amazon.co.uk.



Back Road Map Books and Backroad GPS Maps for all of Canada - a must have!

New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80G/S.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events all over the world with the help of volunteers; we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, or ask questions on the HUBB. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.




All times are GMT +1. The time now is 01:58.