Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


yz490

Reply to topic
Bike Chat Forums Index -> The Workshop
View previous topic : View next topic  
Author Message

twotakt
World Chat Champion



Joined: 25 Oct 2007
Karma :

PostPosted: 22:01 - 07 Apr 2009    Post subject: yz490 Reply with quote

SYMPTONS:

Struggles to rev out but does a bit occassionaly and then struggles and misfires, even with clutch in or in neutral. Juddering when ridden no matter what gear she's in. Idle's ok but no power whats so ever, occasionally power kicks in for a millisecond and then the bike really struggles to hold revs and revs go up and down irratically.

WORK DONE:

Well, I completely stripped the carb i.e. emulsifier out, needle out etc and sprayed through all the jets with compressed air and carb cleaner. Every jet is per manual except the main which is a 400 and not a 440. Spark Plug is brand new B8EG, I took the cap off and held the ht lead ~20mm away from the pot and when kicked over got a nice blue spark. Also a nice spark when spark plug in and earth to pot. The reeds are fine, no damage and close and open properly. The intake manifold looks good with no cracks and a decent gasket.

It's got brand new 95ron fuel with Shell Racing X oil mixed at 40:1.

So, apart from timing I can't think of anything else it may be??? Maybe it was retarded to reduce pinking??? Any suggestions would be appreciated.

Thanks,
Jack
____________________
R.I.P. Tareree Shiimi, 1985-2008
 Back to top
View user's profile Send private message You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :

PostPosted: 00:54 - 08 Apr 2009    Post subject: Reply with quote

Mainjet too small? Confused
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

twotakt
World Chat Champion



Joined: 25 Oct 2007
Karma :

PostPosted: 07:45 - 08 Apr 2009    Post subject: Reply with quote

It won't even rev out to where the main jet comes into action so I doubt it.
____________________
R.I.P. Tareree Shiimi, 1985-2008
 Back to top
View user's profile Send private message You must be logged in to rate posts
Old Thread Alert!

The last post was made 5 years, 9 days ago. Instead of replying here, would creating a new thread be more useful?
Display posts from previous:   

Post new topic   Reply to topic    Bike Chat Forums Index -> The Workshop 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: peanuts (www) - Page Generation Time: 3.70 Sec - Server Load: 0.56 - MySQL Queries: 16 - CDN Objects: 30 - Page Size: 38.85 Kb