A coworker of mine has a fairly new one that had the same type issues. Eventually had to pull the head off and do a valve job.
Specifically Honda.
my trx 450er has been sitting for a while, and needs a little love. It had a high rpm miss when i put it away, and was getting REALLY tough to start. The valves have been checked, and re- shimmed to spec, still no luck.
I'm looking for some advice, or someone to work on it.
lmk
A coworker of mine has a fairly new one that had the same type issues. Eventually had to pull the head off and do a valve job.
I'd do a compression and leakdown test if it's a 4 stroke.
Otherwise look at plug, coil, charging system.
1989 Mustang 408W TT Built by me. Sippin Corn cocktails. 721hp 765TQ on 10lbs
2004 Subaru Forester XT 5spd
1979 Yamaha XS 1100, 70's goodness.
Plug is new, coil has been swapped, we've tried different ignition boxes as well.
I just need to have someone come over with a case of beer and go to town on it.
The base gasket does leak a little, which almost makes me think that it could be pushing past the rings, and causing excessive crank case pressure.
I haven't done a leak down test. good call.
I just might do this tomorrow. sick of having a garage ornament i can't ride.