Bought a blown up 2009 CRF450R against my better judgement a few months ago as a project, it had a failed big end bearing and had locked up. The bike then sat for 6 or so years in his shed before I was lucky enough to get a message from him
.So I rebuilt the engine, new crank, all bearings, piston, clutch basket, basically anything it needed.
Rebuilt dam near everything else on it, was trashed.
Get it back together and try and start it. Couldn't get it going. Cracked it and went home. Gave it a week and calmed down. Came back to it. Checked most of the loom etc. Connected 12v to it through condensor/capacitor plug. Started. Runs sweet etc etc.
Anyway, almost cant start it cold, takes 20-30 kicks and seems like its flooding, so have to wait in between kicks. Then might get a pop. Then wait and a good kick and it will seem to go. But its definitely not right.
Has a new fuel pump, new injector, new spark plug.
Tried a second hand stator, reg, and a new condensor/capacitor. No change. It had a stealhy heavy flywheel, clutching at straws changed it back to original incase magnets were weak. No change.
Have gone through pretty much the whole loom, its driving me bonkers. Cleaned plugs, main earths, etc.
Once you get it running its fine. Can let it sit for 10 mins and it will start first/second kick. Runs like a top. Good power etc. Valves were shimmed, the head wasn't touched during the rebuild but considering it starts first kick with a battery connected it says to me its not mechanical.
If anyone can help at all, that would be great because right now im over invested in a bike I can't even sell
.Thanks all. Be safe!
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