Help & FAQs    Search BCF    Members    Groups    Events Calendar
Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


need help with a engine mod for a yamaha wr 400

 Reply to topic
Bike Chat Forums Index -> Offroad & Supermoto
View previous topic : View next topic  
Author Message

nbrogan
L Plate Warrior



Joined: 07 Jul 2007
Karma :
PostPosted: 21:33 - 13 Jul 2007    Post subject: need help with a engine mod for a yamaha wr 400 Reply with quote
i have heard that there is something can be done to get rid of the decomprestion lever. so it is automatic like the newer ones. any pictures advise or links would be great.

Thanks Nigel
 Back to top
View user's profile Send private message You must be logged in to rate posts

garyd
Brolly Dolly



Joined: 09 Apr 2006
Karma :
PostPosted: 07:45 - 14 Jul 2007    Post subject: Reply with quote
Reckon you need the "Hot start "devise Smile
 Back to top
View user's profile Send private message You must be logged in to rate posts

nbrogan
L Plate Warrior



Joined: 07 Jul 2007
Karma :
PostPosted: 20:42 - 15 Jul 2007    Post subject: Reply with quote
it is nothing to do with the hot start, that is for starting the bike when the engine is hot. i want to do away with the decomprestion lever i have to use to satrt the bike all the time.
 Back to top
View user's profile Send private message You must be logged in to rate posts

joe black
Nova Slayer



Joined: 18 Oct 2006
Karma :
PostPosted: 19:05 - 16 Jul 2007    Post subject: Reply with quote
can,t be done ,whats wrong with manual de-compresser.
 Back to top
View user's profile Send private message You must be logged in to rate posts

nbrogan
L Plate Warrior



Joined: 07 Jul 2007
Karma :
PostPosted: 22:08 - 17 Jul 2007    Post subject: removeing the decoprestion lever Reply with quote
i have found out today that you can in fact remove the decomprestion lever, if you fit the cams out of the later model and time it all up it works. i got speeking to my local dealer who rides wr's himself.
 Back to top
View user's profile Send private message You must be logged in to rate posts

joe black
Nova Slayer



Joined: 18 Oct 2006
Karma :
PostPosted: 13:32 - 18 Jul 2007    Post subject: Reply with quote
are you talking 450 cams ?de-compressor works by centrifugal force acting on weights opening a valve, be interesting to see if it works.


you are right found this

https://www.thumpertalk.com/forum/showthread.php?t=522820
 Back to top
View user's profile Send private message You must be logged in to rate posts

Sparks!
Sir Tart-a-lot



Joined: 30 Aug 2003
Karma :
PostPosted: 20:05 - 18 Jul 2007    Post subject: Reply with quote
joe black wrote:
can,t be done ,whats wrong with manual de-compresser.


It can be done.

It's nothing to do with the hotstart

all to do with replacing the cam for a later model.

go to www.smoto.co.uk and ask there, lots of people have done it and will help you fully with it.. look out for GLM on there as hes done it to his.
____________________
Current Toys: 06 Yamaha WR250F | Nissan 350Z GT | Tech 4 Homes
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

GRUFF
Borekit Bruiser



Joined: 24 Mar 2007
Karma :
PostPosted: 03:40 - 20 Jul 2007    Post subject: Reply with quote
I did this with my yzf250 when it was having some engine work done to it so i assume it would still be possible on a wr. I was glad to get rid of it Thumbs Up
____________________
08 SUZUKI DRZ400SM
01 YAMAHA YZ250F
05 YAMAHA DT125X
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts
Old Thread Alert!

The last post was made 18 years, 343 days ago. Instead of replying here, would creating a new thread be more useful?
  Display posts from previous:   
This page may contain affiliate links, which means we may earn a small commission if a visitor clicks through and makes a purchase. By clicking on an affiliate link, you accept that third-party cookies will be set.

Post new topic   Reply to topic    Bike Chat Forums Index -> Offroad & Supermoto All times are GMT + 1 Hour
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 
Debug Mode: ON - Server: birks (www) - Page Generation Time: 0.42 Sec - Server Load: 7.57 - MySQL Queries: 16 - Page Size: 56.38 Kb