Posts
39
Joined
4/26/2018
Location
pontiac, IL
US
Just got a new 250 this year and put about 30 hours on it and Always keep up on maintinence because i like my stuff to last. Im a local A rider here in illinois and ride the bike pretty hard (only way to get power out of the new honda). Regardless i went out yesterday and got about a lap into my first moto and the motor locked up. Tore it apart and found the cam bearings locked up. In the process it scratched the shit out of my head so it needs replaced as well. Called honda and its actually a problem they are aware of and are going to pick up the bill for all of it. Anyone else have that happen yet?
FWIW, if you followed the manual's recommendations you'd be on your third piston by now. I'd say their intervals are a little conservative.
The Shop
Worked great for 1 hour until a valve snapped and made a mess, my dad managed to fix the head and its up and running again but i think these -18s might have some babyissues
Get him the new parts... let him do his thing to keep it from happening again.
Pit Row
I put in a 306cc big bore stroker with the cases.
I tapped into the oil filter cover and mounted an oil pressure gauge to it to verify PSI after I put it all back together. It had about 6-7 at idle but just off idle and above it shot up to 30-40 psi if I remember right. I must have put 2-3 hours on it on the dyno just to give myself some piece of mind before I gave it back to the rider so he didn't kill himself on it.
The filter screen is between the cases and a pick up tube/plate sandwiches up against it. I actually used a light film of RTV on the case gasket where it touches the screen. In hope that it just sealed up that pick up area in case it was sucking air there somehow and cavitating the pump. I also pre-lubed the hell out of it and primed the oil galleys by rolling it over with a drill on the crank until I got some pressure on the gauge
We've been running Red line Synthetic 10W30 at the standard level with a stainless filter. I tried the extra oil level with one of the head changes and it made no difference.
Im running motul 10w-30 mineral in my 18 not the 19 I’m working on obviously.
Did you have to re-tune the motor to the 306? If you say that’s what it takes to make this motor breathe for again I’m in all the way just have no idea on where to start haha.
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