ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 12-20-2012, 07:50 AM   #1
Lupus60 OP
Lupus
 
Lupus60's Avatar
 
Joined: Dec 2012
Location: Polska
Oddometer: 4
Wossner hi-compr for DR 650 se

I put the DR 650S piston engine Wossner high COMPR. After examination of the pressure in the engine is turned 10 atm. Before replacing the engine was 9 atm. I have a question to colleagues who do the same or not has no effect on engine life? Thank you Google and you;)
Lupus60 is offline   Reply With Quote
Old 12-20-2012, 12:52 PM   #2
NJjeff
Studly Adventurer
 
NJjeff's Avatar
 
Joined: May 2005
Location: NJ
Oddometer: 952
The DR650 has an automatic compression release.
At engine cranking speeds the exhaust valves are held open for a moment to bleed off some pressure making it easier to crank over.

This will prevent you from taking any kind of meaningfull reading.

On the cam there is a small weighted arm with a spring. At very low speeds this arm is held inward by the spring. The other side of the arm has a small finger that briefly opens the exhaust valves.

Once the engine starts up the spring is overcome by centrifugal force and the arm swings slightly outward. This moves the finger and allows the exhaust valves to function mormally.
NJjeff is offline   Reply With Quote
Old 12-20-2012, 01:12 PM   #3
Lupus60 OP
Lupus
 
Lupus60's Avatar
 
Joined: Dec 2012
Location: Polska
Oddometer: 4
Thank you! My problem is this: I'm going far away to Mongolia, fuel in this area is less than 90 oct. I'm afraid combustion detonation! I do not know how it will affect the durability of the engine. I'm sorry, but I have to translate the text;)
Lupus60 is offline   Reply With Quote
Old 12-20-2012, 01:40 PM   #4
NJjeff
Studly Adventurer
 
NJjeff's Avatar
 
Joined: May 2005
Location: NJ
Oddometer: 952
I can only speak of gasoline in the U.S. But in my DR all I have ever used is Regular (87) octane.
My bike has an un-modified engine. I have never had it ping and the bike has 37k Miles (59,000 Km).

I know there are several octane measurment methods, is 87 in the US the same as yours. I cannot say.

Mongolia sounds great. Please take pictures and post a ride report for all to enjoy.

NJjeff screwed with this post 12-20-2012 at 05:31 PM
NJjeff is offline   Reply With Quote
Old 12-20-2012, 01:49 PM   #5
Lupus60 OP
Lupus
 
Lupus60's Avatar
 
Joined: Dec 2012
Location: Polska
Oddometer: 4
I hope everything will be fine. Photos of the show, of course, Mongolia. Now only winter ...
http://www.youtube.com/watch?v=dvp7hhnodIY
Lupus60 is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
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 On

Forum Jump


Times are GMT -7.   It's 12:32 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014