Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Honda Tech

Honda Tech Honda Tech Forum - For Questions specific and of interest to Honda riders only. Questions comparing which bike is best etc go in the "Which Bike" forum.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 8 Jul 2007
orrin's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Dec 2006
Location: Worcester Park
Posts: 181
Whats a good RPM to maintain??

Does anyone know whats a healthy rpm on an old 1986 XL600LM?
The bike seems to be happy at 110km/h @ 4500rpm.
Also when does the secondary feul jet?, kick in?
I found info on the XT forum but not for this bike??
Cheers
Reply With Quote
  #2  
Old 8 Jul 2007
Registered Users
Veteran HUBBer
 
Join Date: Apr 2005
Location: Oxford UK
Posts: 1,009
If it's in good nick - not burning / leaking oil, bearings not noisy, oil pump pumping (partic the scavenge side) etc I would have thought 4500rpm pretty easy for the engine. My 87 XR600 with lower gearing holds this without any problem on the motorway although earplugs do make it slightly more pleasant!

Is yours the twin carb setup? If it is the first carb only leads the second by a couple of mm so at normal speeds they're both working.
Reply With Quote
  #3  
Old 6 Aug 2007
orrin's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Dec 2006
Location: Worcester Park
Posts: 181
Front sprocket 14,15,or16?

I have put a 14 tooth front sprocket on my bike now and the revs are 4500 @ 100km/h. Normally it takes a 15. Does anyone know if I could benafit from a 16 tooth on the front, for those long motorways. will this harm the gear box, motor??
Also, if anyone reading this knows of a good screen for the bike please let me know!
Cheers
Orrin
Reply With Quote
  #4  
Old 7 Aug 2008
Registered Users
New on the HUBB
 
Join Date: Apr 2007
Location: madrid, spain
Posts: 16
no respones...

Hi all!! I bought this same bike some months ago, and I am really happy with it so far. Actually I do have the same questions about the gearing. I see there have been no responses for quite a long time, but, please, if anybody knows if using a 16 teeth front sprocket could do any bad to the bike...
I guess then the ideal thing would be to carry a 14 teeth sprocket for off road riding, and a 16 teeth one for the long ride home...wouldn't it?
But, in that case, how much should I adjust the chain? I guess it wouldn't be much.


thank a lot guys!!

nadir
Reply With Quote
  #5  
Old 7 Aug 2008
Caminando's Avatar
Moderated Users
Veteran HUBBer
 
Join Date: Jan 2006
Location: DogZone Country
Posts: 1,227
Smile

Cant help you about your specific bike, but manufacturers of sprockets for industrial use advise not using sprockets with less than 16 teeth.....
Reply With Quote
  #6  
Old 7 Aug 2008
djorob's Avatar
Seek and thou shalt find.
Veteran HUBBer
 
Join Date: Feb 2006
Location: Midlands/UK
Posts: 233
Rrrpm!

Here's one for you to try!
Find out at what RPM tour motor produces the most torque and give a go at cruising at that!
You may find you get the bsst MPG (or KPL for you metric lovers).
Dave.
Reply With Quote
  #7  
Old 8 Aug 2008
Contributing Member
Veteran HUBBer
 
Join Date: Jul 2002
Location: Sydney, NSW, Australia
Posts: 1,366
Quote:
Originally Posted by Caminando View Post
advise not using sprockets with less than 16 teeth.....
The 16 tooth min for chains is an effeciency/chain ware thing .. you loose a little effeciency and increase the chain ware under 16 teeth .. the smaller you go the worse it gets. It has been measured in a lab. It does not make that much difference in the motorcycle world - not many people detect the effeciency (miles to the gallon) nor chain life reductions.
__________________
---
Regards Frank Warner
motorcycles BMW R80 G/S 1981, BMW K11LT 1993, BMW K75 G/S
Reply With Quote
  #8  
Old 2 May 2009
Registered Users
New on the HUBB
 
Join Date: May 2009
Location: California
Posts: 8
I read somewhere that alternating your RPM's when at speed helps to keep the piston rings from getting varnished. I cant help but think this is not valid.
Reply With Quote
  #9  
Old 2 May 2009
Registered Users
Veteran HUBBer
 
Join Date: Feb 2006
Posts: 1,513
Quote:
Originally Posted by djorob View Post
Here's one for you to try!
Find out at what RPM tour motor produces the most torque and give a go at cruising at that!
You may find you get the bsst MPG (or KPL for you metric lovers).
Dave.
I agree djrob.
It was always a rule of thumb for old Brit bikes also, Probably your bike will like that as well. But if the bike feels happy at 4500rpm, it probably is.
Re sprocket size, Load your bike up wit the maximum weight and try touring, you will soon know if it is overgeared because you will be changing gear a lot. Remember to save fuel you need both low revs AND low throttle openings. Think of it this way, at 10,000 rpm full throttle you are using twice as much fuel as the same engine at 5,000 rpm at full throttle, and four times less at 5,000 at half throttle. This is only arough guide, there are other factors, butthe biggest factor in fuel consumption is the riders right wrist.
Reply With Quote
  #10  
Old 12 Mar 2010
Registered Users
New on the HUBB
 
Join Date: Feb 2010
Location: ireland
Posts: 16
Quote:
Originally Posted by orrin View Post
Does anyone know whats a healthy rpm on an old 1986 XL600LM?
The bike seems to be happy at 110km/h @ 4500rpm.
Also when does the secondary feul jet?, kick in?
I found info on the XT forum but not for this bike??
Cheers
i have a xl600lm with 16inch gpz wheels.i run standard 15 up front and 39 rear for motorway riding.then if i am doing a lot of street riding or trail riding i put a 13 on the front and can just about get the right tension on the chain.with the 13 up front its that small that the chain links have worn 0.5mm off the retainer plate nuts.apart from that no problems i can cruise at 65 at 4000rpm on long motorway runs.although i would not ride two up or with heavy luggage with this gearing.goodluck ian.
Reply With Quote
Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tyre Reviews davidlomax Equipment Reviews 11 10 Aug 2008 22:12
Maps - Is it possible to get good maps on the road? Iain South America 3 3 Nov 2005 21:24
Good place for Christmas mattpope South America 7 27 Dec 2004 05:14
good tires in east africa esteban Route Planning 5 28 Oct 2003 18:52
Good link for UK travel insurance GS George Staying Healthy on the Road 1 27 Apr 2002 00:28

 
 
 

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!


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.


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

amazon

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 01:58.