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.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

LinkBack Thread Tools Display Modes
Old 9 Jan 2003
Registered Users
HUBB regular
Join Date: Apr 2001
Location: Australia
Posts: 42
Help Oil Pump Advice Needed

Hi Klaus and all riders.
Pull the Top end off my 34L Tenere last night and the clacking sound was a result of one badly trashed Big end bearing. The crank ends around the pin are bluish in colour so I figure it didn't get enough lubrication.
Anyway before I rebuild it I want to get the double haul oil pump. What was the first model of Tenere AND normal XT600 that used this?. Will a normal XT600 oil pump fit in the 34L Tenere?

And also when I ask for the part from a wrecker what do I ask for besides the oil pump ie is there are sprocket and o-rings aswell?.

Thankyou for your assistance


[This message has been edited by dougM (edited 09 January 2003).]
Reply With Quote
Old 10 Jan 2003
KlausXT600's Avatar
Registered Users
Veteran HUBBer
Join Date: Sep 2000
Location: Hamburg, Germany
Posts: 295
hi doug,
are you sure there was enough oil in the engine?
anyway, since very long time yamaha doesn't sell 34L oil pumps anymore.
the only oil pumps available are the 1VJ pump and the 3AJ pump.
the feed side rotor thickness and hence the hauling capacity has developed from 4 mm (34L) to 6 mm (1VJ) to 8 mm (3AJ).
scavenger side rotor thickness is always 18 mm.
every pump is coded with 5Y1 on the bottom and a) no code (34L) b) 1VJ c) 3AJ on top.
there are also three different shafts:
34L: one groove (for circlip)
1VJ: two grooves
3AJ: three grooves
34L shaft and 1VJ shaft have equal length, only the drive pin hole position is different (because different thickness of rotor). therefore both pumps use the same sprocket.
3AJ shaft is longer and therefore requires a different sprocket (with code 3AJ).
yamaha advises to use the 1VJ pump for the following models: 34L, 55W, 43F, 1VJ, 2KF, 2NF, 59X(TT600).
3AJ pump should be used in 3AJ, 3TB, 4PT, DJ02 (generally every xt600 model since 1989 (tenere) resp. 1990 and also the later tt600 models).
nevertheless it is possible to mount the 3AJ pump in a 34L engine.
i would use the 1VJ pump for a 34L.
beside the pump you need two new o-rings and a paper gasket (to be mount between pump and housing). if you choose the 3AJ pump you need also the 3AJ sprocket.

hope this helps,
Reply With Quote
Old 13 Jan 2003
Registered Users
HUBB regular
Join Date: Apr 2001
Location: Australia
Posts: 42
Thankyou for your informative reply Klaus. From your advice I think I will go with the 1vj oil pump.
couple of questions.
1) when I look at the parts microfiche for the 1vj model there is no oil pump gasket? Does the modification definetely require a gasket?
2) A new oil pump is around $250 Australian. Is there any chance you would be able to sell me a second hand 1vj unit or would I be better off buying a new unit in the sense that a second hand unit could be worn or is this able to be tested?.

Thanks again for your help

Reply With Quote
Old 13 Jan 2003
KlausXT600's Avatar
Registered Users
Veteran HUBBer
Join Date: Sep 2000
Location: Hamburg, Germany
Posts: 295
it will function also without paper gasket.
as far as i know that gasket is added with the 3AJ pump. don't know wether it is available as a single part.
i have second hand one, but not in a condition that i would sell.
all used pumps i have seen up to now have exceeded the specified wear limit. they will function, of course, but not as good as a new one, especially when oil becomes hot and thinner.
try here:
it seems that some parts are much cheaper in usa.

Reply With Quote

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

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


NEW! HU 2015 Motorcycle Adventure Travel Calendar is now available! Get your copy now for some terrific travel inspiration!

HUGE, 11.5 x 16.5 inches, beautifully printed in Germany on top quality stock! Photos are the winning images from over 600 entries in the 9th Annual HU Photo Contest!

Horizons Unlimited 2015 Motorcycle Adventure Travel Calendar.

"The calendar is magnificent!"

"I just wanted to say how much I'm loving the new, larger calendar!"

We share the profit with the winning photographers. YOU could be in the HU Calendar too - enter here!

Next HU Eventscalendar

See all events


HU DVD Autumn Special!

Take 40% off Road Heroes Part 1 until October 31 only!

Road Heroes features tales of adventure, joy and sheer terror by veteran travellers Peter and Kay Forwood (193 countries two-up on a Harley); Dr. Greg Frazier (5 times RTW); Tiffany Coates (RTW solo female); and Rene Cormier (University of Gravel Roads).

The first in an exciting new series, Road Heroes features tales of adventure, joy and sheer terror by veteran travellers."Inspiring and hilarious!"

"I loved watching this DVD!"

"Lots of amazing stories and even more amazing photographs, it's great fun and very inspirational."

"Wonderful entertainment!"

Check it out at the HU Store! Remember to use Coupon Code 'HEROES' on your order when you checkout.

Scottoiler automatic chain oilers. The most important accessory for your next motorcycle adventure!

Renedian Adventures

Renedian Adventures

What others say about HU...

"I just wanted to say thanks for doing this and sharing so much with the rest of us." Dave, USA

"Your website is a mecca of valuable information and the DVD series is informative, entertaining, and inspiring! The new look of the website is very impressive, updated and catchy. Thank you so very much!" Jennifer, Canada

"...Great site. Keep up the good work." Murray and Carmen, Australia

"We just finished a 7 month 22,000+ mile scouting trip from Alaska to the bottom of Chile and I can't tell you how many times we referred to your site for help. From how to adjust your valves, to where to stay in the back country of Peru. Horizons Unlimited was a key player in our success. Motorcycle enthusiasts from around the world are in debt to your services." Alaska Riders

contest pic

10th Annual HU Travellers Photo Contest is on now! This is an opportunity for YOU to show us your best photos and win prizes!

NEW! HU 2014 Adventure Travel T-shirts! are now available in several colors! Be the first kid on your block to have them! New lower prices on synths!

HU 2014 T-shirts now in!

Check out the new Gildan Performance cotton-feel t-shirt - 100% poly, feels like soft cotton!

What turns you on to motorcycle travel?

Global Rescue, WORLDwide evacuation services for EVERYONE

Global Rescue is the premier provider of medical, security and evacuation services worldwide and is the only company that will come to you, wherever you are, and evacuate you to your home hospital of choice. Additionally, Global Rescue places no restrictions on country of citizenship - all nationalities are eligible to sign-up!

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 R80 G/S motorcycle.

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 (22 this year!); 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, the HUBB or to receive the e-zine. 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.

Books & DVDs


All the best travel books and videos listed and often reviewed on HU's famous Books page. Check it out and get great travel books from all over the world.

Motorcycle Express for shipping and insurance!

Motorcycle Express

MC Air Shipping, (uncrated) USA / Canada / Europe and other areas. Be sure to say "Horizons Unlimited" to get your $25 discount on Shipping!
Insurance - see: For foreigners traveling in US and Canada and for Americans and Canadians traveling in other countries, then mail it to MC Express and get your HU $15 discount!

All times are GMT +1. The time now is 15:32.