2017 Hisun Strike 250 oil in airbox and not hitting top speed

[nick.s]

my 2017 hisun strike 250 has oil in the airbox and only does 25 mph is there any suggestions as to how to correct this issue i am new to these machines i have not yet gotten into the clutch to look at that yet previous owner says drivebelt is new

[aefron88]

I'm not specifically familiar with the 250's however...

Likely if there's oil in the air box the oil level in the engine is way too high. Check the dipstick and see where it's at. If it is that high it's probably worth replacing the spark plug and cleaning the air filter as both will likely have gotten oil on them and may be causing further iissues.you may find oil weeping out other spots too.

I believe I have read that the "newer" 250's have a safety governor that isn't disableable as they're primarily marketed towards kids, so that may be the 25mph limit. Not sure exactly what year that started.

[kenfain]

Check the crankcase ventilation also. It's unlikely that there should be a problem with it on a machine that new. But the symptoms certainly match, and it only takes a couple minutes to check.