Hey everyone, this is for anyone with a 250 honda type engine. IF this has been covered I appologize for being redundant.

The other other day I seemed to recall having to check final drive gear oil levels in scooters (I used to work at a couple Honda motorcycle shops years ago). Anyhow my curiousity got the best of me and I finally went out and looked and I was correct. On the back of the transmission there is an oil level check bolt, 14mm socket head that is used to check the oil level. Oil should start to run out of the hole when the bolt is removed. I did a little searching for more information on this and found a Helix forum (CN250) that had a couple posts with some information. When I checked mine, no oil came out and I'm wondering if there's even any in there. Either way, it's something that should be checked because it's critical. Better to know about it before it's too late. Here's the information and a pic to help.

Rod


Tech Tip #9 - Final Drive Oil Change

Its time to change the final drive oil on your CH250. Yes, boys
and girls, it's a little time consuming and somewhat aggravating
to remove the body center cover, left side panel and rail, pillion
step and brake cables just to get to the left crankcase cover so
that you can access that little drain bolt but you have to. It's best
to do this while the bike is on its centerstand.

The oil check bolt has a washer and is the larger of the bolts near the clutch
assembly. It's the one that the rubber hole cover exposes without
removing the crankcase cover.

Remove the oil check bolt. The oil should seep out some.
The oil drain bolt also has a washer and is the smaller bolt directly under and to the left the oil check bolt.

Remove the oil drain bolt and drain oil in a pan until crankcase is
empty. To get all the oil out, replace the oil check bolt and apply
light compressed air through the crankcase breather tube which
runs outside the back of the crankcase to the air filter box.
Reinstall drain bolt. The Honda service manual recommends at
every 12K miles or two years whichever comes first you change
the oil and fill the crankcase with a good 10w30 oil through the
check bolt. Reinstall check bolt. Start engine and test ride for 2-3
minutes. Stop engine and check that the oil level is correct and
that there are no leaks. Reinstall left crankase cover and body
parts in reverse order. And now the truth---You really want to use
a good 75w90 gear oil such as Mobile 1 synthetic in the final
drive. And, all giggles aside, change the oil at least every 5K
miles or two years. You're not fighting heat in the transmission
here but rather gear shearing. Buy the oil that best fits the
prevention. Randy Pozzi

Moved to the engine clinic.

Great info post.

Here's a little better pic.

thanks for the information,i been looking for the plugs for a while now,didn't think of removing the cvt cover.

Make sure you clean the oil strainer on the first oil change!

Metal shavings left over from manufacturing process.

im glad yall made me think of this while im doing all the mods on my sunl 250 . i change the oil and the gear box and will do the trans later when i get to cvt later this week . so what do we use for gear oil ?i just might drain the coolent too . just get all new stuff in it

im glad yall made me think of this while im doing all the mods on my sunl 250 . i change the oil and the gear box and will do the trans later when i get to cvt later this week . so what do we use for gear oil ?i just might drain the coolent too . just get all new stuff in it

where did you find this at???

find what the cart ? i got it a scootertown.i