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Enduro Electrical & Wiring Lighting, Ignition, Wiring, Plugs, etc. |
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Thread Tools | Display Modes |
#1
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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. |
#2
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Quote:
dont worry about the words ive got the pic from a site on cleaning the power valve |
#3
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Still clueless
Last edited by motopsycho87; 07-20-2013 at 05:24 AM. |
#4
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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.
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-Mike 2009 Beta Evo 300 4T - 1982 Suzuki PE175 |
#5
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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
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03 ec300 honda cr500 94 |
#6
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Any luck yet?
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-Mike 2009 Beta Evo 300 4T - 1982 Suzuki PE175 |
#7
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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? |
#8
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Negative on the crank seals,engine will need to be removed.
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#9
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Flywheel side crank seal can be replaced easily just open cover and pull flywheel off..
Sent from Razr MAXX
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plated 300EC 2008 |
#10
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manual says right hand is done from outside??
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