Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
Help Please - 34L "popping" Help Please - 34L "popping"
Register FAQ Calendar Today's Posts
Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Ellen Delis, Lagunas Ojos del Campo, Antofalla, Catamarca

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


Photo by Ellen Delis,
Lagunas Ojos del Campo,
Antofalla, Catamarca



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 28 Mar 2007
jim jim is offline
Gold Member
Veteran HUBBer
  
Join Date: Aug 2003
Location: Cape Town South Africa
Posts: 222
Help Please - 34L "popping"
Hello all,
Im on the road and my bike is worrying me. Firstly i think its overheating, but im not sure, how the hell do i know- when i touch the engine its very hot and it hurts. Also, on the open road she rides well, when i slow down to 2nd / 3rd gear range (ie slow ridng) it give little backfires, not shotgun blasts, but popping sounds when i decelerate to change gears. Been fiddling today with pilot screw, and i thin k its a bit worse now. Also, usually its a bitch to start her in the morning but today she started ok and later on was difficult to start when hot.

Help!
Jim
__________________
"If we don't find something good at least we will find something new." Voltaire
Reply With Quote
  #2  
Old 28 Mar 2007
*Touring Ted*'s Avatar
Contributing Member
Veteran HUBBer
  
Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,656
Your symptom are those of an over lean mixture.

The popping when you close gear is called over run and while it is normal of large singles, popping is the sign of too much air in the fuel mixture..

Tell me, does this occur at closed throttle only ??

If it is hard to start, is this even with full choke ??

There are many reason for hard starting and a lean mixture is one of them.

You could try unwinding the pilot screw a little and trying then. If adjustment doesnt help then a larger pilot jet maybe required.

Have you changed the exhaust system or air filter etc ?


Wind the pilot screw in until its seated (not too tight now) and then unwind 1.5 turns and start from there.

The XT is aircooled so yes it does get hot. Check your oil is bubbling though. You can buy oil temp guages which replace the oil cap.
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
Reply With Quote
  #3  
Old 28 Mar 2007
Registered Users
Veteran HUBBer
  
Join Date: Jan 2001
Location: Stockholm
Posts: 651
Talking Leaks or settings
Jim,

We meet again?

If she runs fine for the rest I would not worry too much. Even if the idle mix is too lean, this has no influence whatsoever on the mix with open throttle.

- Is the popping only when you close the throttle? If yes, there's a hole somewhere in the exhaust system or the enrichment device is gunked up. It's the thing on the l/H side of the left carb, little cover with the vacuum operated valve, vacuum from the throat of the second carb.
- If there is popping, with the engine not pulling at the same time, your mix is indeed too lean, but as carbs do not get offtune by themselves it must be something like the intake rubbers leaking air, that's the black thingies between carb and cilinder head.
- Hard starting: Adjust idle mix: heat up engine. With a flat screwdriver turn in pilot screw till engine speed drops, then turn out till max engine speed is reached. do this slowly, gove engine time to react. The higher engine speed will be over a range of screw settings, leave it just before the point where the speed starts to drop again. This setting should give you good starting with cold engine, full choke

Succes! and happy travels!
Auke
__________________
Auke
http://aukemarieke.blogspot.com
Reply With Quote
  #4  
Old 1 Apr 2007
Registered Users
HUBB regular
  
Join Date: Aug 2006
Location: Cape Town
Posts: 28
mixture
Hey Jim,

Not good to hear you having problems so early in the trip! Where about are you guys now? I definatly agree its a mixture thing, Mac,(bryan) bike does the same thing ansd its very lean, my bike however i feel is running slightly rich, this never gives me hastles to start when cold, but can be a little tricky when the bike is hot. i normally just use a little patience and wait as opposed to kicking new vents in my boots! Are you guys still in S.A.? will give you a call if you are!

All the best, regards to Anniken!
Cheers,

Chris
Reply With Quote
  #5  
Old 2 Apr 2007
jim jim is offline
Gold Member
Veteran HUBBer
  
Join Date: Aug 2003
Location: Cape Town South Africa
Posts: 222
Thanks Guys

Turns out there was an air leak in the intake rubber, which fortunately I had a spare of.. She's running pretty now!

JIm
__________________
"If we don't find something good at least we will find something new." Voltaire
Reply With Quote
Reply

« Previous Thread | Next Thread »

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
XT600Z 34L silencer question andylarkin Yamaha Tech 0 24 Mar 2007 14:43

 
 

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

HU Event and other updates on the HUBB Forum "Traveller's Advisories" thread.
ALL Dates subject to change.

2024:

Add yourself to the Updates List for each event!

Questions about an event? Ask here

HUBBUK: info

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...

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!

Your ad could be here, on EVERY page of the HUBB, or the whole website, or as many as you like!

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 20:41.

Contact Us - Horizons Unlimited Motorcycle Travellers Website - Archive - Privacy Statement - Top