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

Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Honda Tech
1988 PD06 Transalp carb jetting for altitude? 1988 PD06 Transalp carb jetting for altitude?
Register FAQ Calendar Search Today's Posts Mark Forums Read

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.
With more than 58 destinations worldwide, Edelweiss Bike Travel is Number 1 in guided motorcycle tours!

We've had a code update on the HUBB that should fix any issues with the new right hand column. If the HUBB still "looks funny" please force a refresh to get the latest code update. (Hold down the shift OR ctrl key, and click the refresh button on your browser, OR Ctrl R, OR on Macs, Command R). If you still have a problem please post it here.


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 26 Mar 2012
chris's Avatar
Probably out riding
Veteran HUBBer
  
Join Date: Jun 2000
Location: God's Own County
Posts: 1,701
1988 PD06 Transalp carb jetting for altitude?
Hi guys
This summer I’m riding my 88 Trannie in Central Asia. In places like Tajikistan/ Kyrgyzstan I could be up at 4000m/16000 feet above sea level. Has anyone ridden at altitude and adjusted/changed their carb jets? Currently the bike has standard jetting as it came out of the factory. Would you replace the jets? If so, to which size?

Many thanks for any advice.


Best wishes,
Chris
Reply With Quote
  #2  
Old 27 Mar 2012
ta-rider's Avatar
Registered Users
Veteran HUBBer
  
Join Date: Dec 2009
Location: Germany
Posts: 500
Hi Man,

I have just been riding a 125ccm bike up to 4800 meters altitude in Bolivia. There the engine lost a lot of power so i could onely ride up to 30 km/h insted of 100 but the Transalp is much stronger and for a "short" distance i would not start fideling around with the carborator. It also needs adajustmend afterwards scince the transalp has two cylinders. Just take it slower there and enjoy the landscape. I met people on a Africatwin and they told me they did not feel the difference

The maximum i would do is screw the german "Leerlaufgemischregulierschraube" kompletly in. Normal its 2.5 windings out...this helps if you ride at low rpm.

Reparaturanleitung und Wartung Motorrad Honda XL 600V 650V 700V Transalp PD06 PD10 RD10 RD13

Greetings, Tobi
Reply With Quote
  #3  
Old 30 Mar 2012
chris's Avatar
Probably out riding
Veteran HUBBer
  
Join Date: Jun 2000
Location: God's Own County
Posts: 1,701
Hi Tobi
Many thanks for your very useful input. The bike has a huge 30 litre Africa Queens tank, so I need to have a look how I can access the idle screw with the tank in situ.
Chris
Reply With Quote
  #4  
Old 30 Mar 2012
ta-rider's Avatar
Registered Users
Veteran HUBBer
  
Join Date: Dec 2009
Location: Germany
Posts: 500
Hi man,

There are two screws one for each cylinder. Do you have a petrol pump as well? Otherwise you cant use the last few liters of petrol because the presure is to low and you carry wait for nothing.

Travel save, Tobi
Reply With Quote
  #5  
Old 30 Mar 2012
chris's Avatar
Probably out riding
Veteran HUBBer
  
Join Date: Jun 2000
Location: God's Own County
Posts: 1,701
Yes, I have a petrol pump. And it works.... I ran out of gas the other day as the plastic reserve tubes had become detached from the fuel taps and were rattling around the inside of the tank. Previous to last filling up I had taken the tank off and had it upside down to repair a hole. They must have falled out.

Luckily I was 1 km away from a gas station and I could roll down the hill all the way to it.

Chris
Reply With Quote
  #6  
Old 12 Apr 2012
dstehouwer's Avatar
Contributing Member
Veteran HUBBer
  
Join Date: Jun 2008
Location: Now Alberta, Canada! (originally the Netherlands)
Posts: 247
we just were in Bolivia with two africa twins without changing jets, and reached 4930 meters altitude.
Above 4500m, one bike ran on one cylinder :-S. The other was fine.
Sure, lack of power and huge lack of torque at low RPM's, but I wouldn't swap jets if I would have to do it again. On these bikes, it is such a nightmare to swam them...
Reply With Quote
  #7  
Old 12 Apr 2012
chris's Avatar
Probably out riding
Veteran HUBBer
  
Join Date: Jun 2000
Location: God's Own County
Posts: 1,701
Quote:
Originally Posted by dstehouwer View Post
we just were in Bolivia with two africa twins without changing jets, and reached 4930 meters altitude.
Above 4500m, one bike ran on one cylinder :-S. The other was fine.
Sure, lack of power and huge lack of torque at low RPM's, but I wouldn't swap jets if I would have to do it again. On these bikes, it is such a nightmare to swam them...
Many thanks for the useful input. Yeh, I think I'm going to leave the carbs alone. Messing with them is a huge pain in the butt. When I rode my airhead BM a decade ago in South America with bing carbs next to my feet it was easy. But not on the Honda v-twins.

cheers
Chris
Reply With Quote
  #8  
Old 29 Apr 2012
Registered Users
Veteran HUBBer
  
Join Date: Jul 2006
Location: the Netherlands
Posts: 138
but is the fuel quality not a lot lower there?
so when the quality is lower, you need more (make it richer)
when going up in altitude it becomes richer
...
so do you actually need to changes the jetting?

just a thought..it's not my cup of tee.
__________________
I’m not afraid to go fast, it’s the crash and burn part that sucks.
Reply With Quote
Reply

« Previous Thread | Next Thread »

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

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


All times are GMT +1. The time now is 00:44.

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