Rieju & GasGas Legacy Riders Club Forum  

Go Back   Rieju & GasGas Legacy Riders Club Forum > GasGas Enduro Technical Forums > Enduro Electrical & Wiring

Enduro Electrical & Wiring Lighting, Ignition, Wiring, Plugs, etc.


Reply
 
Thread Tools Display Modes
  #1  
Old 07-07-2013, 06:20 AM
motopsycho87 motopsycho87 is offline
Senior Member
 
Join Date: Jun 2013
Location: Suffolk, UK
Posts: 905
Default Really sputters at high revs now

Hi, I recently purchased a GasGas EC300 2006 from 'greenlane motorcycles', a dealer with whom I suggest you avoid like the plague due to many lies in the sales process and general bad customer relations.

The bike
Since purchase I have
Changed oil
New oiled air filter
Rejetted for best performance (40pilot, 180main), running 32:1 fuelil


The bike ran great, in which I decided to ride on the local motocross circuit, half way through the second lap, suddenly the bike refused to rev high;
https://www.youtube.com/watch?v=4e_H_ogPWx8 - video showing the bike running badly.

This problem is now constant, I have checked the following;

Spark plug, replaced - BR8ES
Ignition coil, HT lead and plug cap replaced
Stator coil replaced - Electrex
Carb has been cleaned
Reeds are in good condition
Power valve is operating correctly
Piston appears clean and ring are in tact
Engine has very good compression on the kick start
All earth points have been checked
All wiring has been checked and re-shielded

The bike starts first or second kick every time, idles very strongly, but will not rev past approximately 5000-6000rpm. The bike can be ridden and still pulls at full throttle below this rev range.

At this point all I can think is that I have a faulty CDI? I have tried running the bike with both 'maps', bypassing the switch etc, but to no avail. Is there any way to test the CDI or anyone I can send it to for testing? Or are there any other possibilities you think I should consider?



Last edited by motopsycho87; 07-20-2013 at 05:24 AM.
Reply With Quote


  #2  
Old 07-07-2013, 07:55 AM
bonkeye bonkeye is offline
Senior Member
 
Join Date: Aug 2011
Location: Bridgend, south wales, UK
Posts: 225
Default

Quote:
Originally Posted by motopsycho87 View Post
http://www.youtube.com/watch?v=4e_H_ogPWx8

GASGAS EC300 2006

Since I've had the bike it has had a bit of a top end burble, which eventually cleared out, but now I have this. What do you reckon it is? I have changed the secondary ignition coil, new plug, ht cap etc, the carb is clean and float is correct, the bike runs just as strong as ever (even at full throttle), but right after the power valve opens it coughs and sputters and never clears out, any ideas?
have you inspected the power valve? mine wouldnt rev out sort of like that the bolt had come out from the rocker plate ive also had the lug snap off that holds the rod from the bottom end

dont worry about the words ive got the pic from a site on cleaning the power valve
Reply With Quote
  #3  
Old 07-19-2013, 02:02 PM
motopsycho87 motopsycho87 is offline
Senior Member
 
Join Date: Jun 2013
Location: Suffolk, UK
Posts: 905
Default

Still clueless

Last edited by motopsycho87; 07-20-2013 at 05:24 AM.
Reply With Quote
  #4  
Old 07-29-2013, 01:40 PM
Coop's Avatar
Coop Coop is offline
Senior Member
 
Join Date: Mar 2013
Location: Acme, Pa
Posts: 480
Default

Make sure you are 1000% the system is grounded properly. I recently dual sported my bike and it was running similarly to like you describe. I could not give it more than 1/2 throttle without it breaking up. I went back over my wiring with a fine tooth comb and found the bad ground. My bike rips again.
__________________
-Mike
2009 Beta Evo 300 4T - 1982 Suzuki PE175
Reply With Quote
  #5  
Old 07-30-2013, 02:36 PM
gassergrant gassergrant is offline
Senior Member
 
Join Date: Jun 2011
Location: Herts England
Posts: 428
Default

any way you can get hold of a cdi (ecu) to swap over for a test, that might be a easier way of testing it.
is the exhaust blocked in any way ie carbon, mud wedge down it.
long shot I had a connection on the cdi come off it ran like that. run over the loom and check its all connected up.

hope you get it sorted
__________________
03 ec300
honda cr500 94
Reply With Quote
  #6  
Old 08-04-2013, 09:40 PM
Coop's Avatar
Coop Coop is offline
Senior Member
 
Join Date: Mar 2013
Location: Acme, Pa
Posts: 480
Default

Any luck yet?
__________________
-Mike
2009 Beta Evo 300 4T - 1982 Suzuki PE175
Reply With Quote
  #7  
Old 08-23-2013, 03:28 PM
motopsycho87 motopsycho87 is offline
Senior Member
 
Join Date: Jun 2013
Location: Suffolk, UK
Posts: 905
Default

So far replaced

coil
stator coil
cdi (rm125, got same, so switched back for good measure)
piston (wossner)


Reeds appear fine, power valve is operating properly.

This says to me either carb or crank seals? I've had the carb apart and can't see anything obvious, it ran fine on this jetting before so I'm not changing it, all I can think is the crank seals? Can these be changed with the engine in situe?
Reply With Quote
  #8  
Old 08-24-2013, 07:38 AM
john r b's Avatar
john r b john r b is offline
Platinum Level Site Supporter
 
Join Date: Aug 2012
Location: Warrenton,Va
Posts: 956
Default

Negative on the crank seals,engine will need to be removed.
Reply With Quote
  #9  
Old 08-24-2013, 09:40 AM
Jiikoo811 Jiikoo811 is offline
Member
 
Join Date: Nov 2009
Posts: 82
Default

Quote:
Originally Posted by john r b View Post
Negative on the crank seals,engine will need to be removed.
Flywheel side crank seal can be replaced easily just open cover and pull flywheel off..

Sent from Razr MAXX
__________________
plated 300EC 2008
Reply With Quote
  #10  
Old 08-24-2013, 12:46 PM
motopsycho87 motopsycho87 is offline
Senior Member
 
Join Date: Jun 2013
Location: Suffolk, UK
Posts: 905
Default

manual says right hand is done from outside??
Reply With Quote
Reply



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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sputters at high revs... motopsycho87 Enduro Electrical & Wiring 9 06-21-2013 10:12 PM
Power drops with revs swazi_matt Enduro Electrical & Wiring 0 10-09-2011 05:52 AM
Max revs when starting up. Todd5774 Enduro Intake/Carburetion - 2 stroke 4 01-24-2010 08:22 AM
EC300 Revs when cold-started stevethebrit Enduro Intake/Carburetion - 2 stroke 6 07-10-2009 11:04 PM
Revs from hell -- stuck throttle or bad mojo? AZRickD Enduro Intake/Carburetion - 2 stroke 25 01-21-2009 08:54 PM




All times are GMT -5. The time now is 12:29 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright 2009 - GasGasRider.org