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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


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Old 07-25-2018, 03:33 PM
Desert Silver Desert Silver is offline
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Default 2015 ec300e

I'm new to Gas Gas having worked on Jap bikes, CanAm's ATK's and KTM's. I'm in the process of rebuilding my son's 2015 Gas Gas ec300e that he bought from G Aaron. It was a Mag test mule and I have no idea how much time is on the motor. His complaint is while it has great bottom and mid it has NO top end. I'm in the process of tearing it down a little at a time due to the garage temps (triple dig and can only work for a half hour to an hour at most). My question is, what brand of piston was used in the 15 300 and is it a forged piston. How much does the billet head from RK tech help performance? I know I'll be coming back with more questions on this engine. Thank you in advance for any advice given.
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Old 07-25-2018, 04:22 PM
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Please try JETTING the bike first...
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Old 07-25-2018, 09:44 PM
Desert Silver Desert Silver is offline
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Originally Posted by john r b View Post
Please try JETTING the bike first...
My son has has already been playing with the jetting and the PV settings. My son is 41 years old and not some kid. The only reason I'm working on it is between his job and my grandson he has no time while I'm retarded er retired and have plenty. He's had the bike for about 2 years already and it's only recently that he's noticed that the top end power isn't what it was. I'm thinking the PV is carboned up and not opening all of the way. He doesn't use the top end very often but wants it to be there when he needs it. He used to be the one everybody used to bring there bikes to him to fix as I said, he has no time now. Is there a difference between the 09 and the 15 300 as far as pistons or gaskets are concerned?
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Old 07-25-2018, 10:50 PM
Nocams Nocams is offline
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Same piston mate.
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Old 07-26-2018, 01:12 PM
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Have you checked the PV settings? 2,5-3 turns out just to see if its there
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Old 08-01-2018, 03:34 PM
Desert Silver Desert Silver is offline
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Same piston mate.
Thank you!
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Old 08-03-2018, 02:12 PM
Desert Silver Desert Silver is offline
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Found out he wasn't just talking about the top end power but being down on power which figures as the piston is worn out. Been trying to get the inner clutch cover off but so far no joy. I've gone over the case looking for any bolts left in but haven't found any. Removed the impeller but not the seal yet. I've been tapping on the cover with a rubber mallet and the part of the case by the kick starter will come away from the center cases but not the front near the water pump. Is the water pump seal holding the case from coming off? On the KTM's I've worked on the whole water pump comes off with the case.
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Old 07-25-2018, 06:11 PM
memphis2857 memphis2857 is offline
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Yep, jetting. I’ve heard that Geoff loves jetting his bikes super lean. I imagine you will find a tiny main jet in there. Get yourself a N3CH needle, a 42 pilot, and a 178-180 main. Report back and thank me later


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Old 07-25-2018, 06:30 PM
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Yep, jetting. I?ve heard that Geoff loves jetting his bikes super lean. I imagine you will find a tiny main jet in there. Get yourself a N3CH needle, a 42 pilot, and a 178-180 main. Report back and thank me later


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Awsome!!!
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Old 08-03-2018, 03:33 PM
Desert Silver Desert Silver is offline
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Quote:
Originally Posted by memphis2857 View Post
Yep, jetting. I?ve heard that Geoff loves jetting his bikes super lean. I imagine you will find a tiny main jet in there. Get yourself a N3CH needle, a 42 pilot, and a 178-180 main. Report back and thank me later


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My son did say it was jetted very lean.
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