I have a conti cqb 250 s quad bike. where do i put the transmission oil

There is a Royal Enfield Continental 250, and there is a little known Chinese Conti Quad 250.

Full 'year make model (what it is)' in all questions please.

https://www.google.com/search?q=conti+250+quad+valve+clearance

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You will need to replace the head gasket. Tightening the head will not work once the oil has found a path to leak out.

can you order a new key with the S/N # for the bike and or get a new lock installed on the unit

Hello. It sounds like your carburator is gummed up. Go to any auto parts store and get a bottle of a product called seafoam. This is a fuel additive. Just follow the directions on the bottle and add the proper amount to the fuel tank. Then run your bike and as you go you will notice the engine running smoother and the bike going faster. Also be sure the spark plug is new and the air filter too! Regards, Joe

It sounds like a problem with the battery. Is it charged? Was it left sitting uncharged for a long time? It might need a new battery. What is the maximum weight capacity of the vehicle? Are you overloading it?

bike starts and revs but wont select in to gear

Google for the information you need..

sounds like too much oil in the mix add more gas & clean spark plug
Cheers Rob

you go and search in google

not positive what you are asking, but on this bike, the engine oil also lubricates the transmission gears. what is key is to use a motorcycle oil. automobile oils are too slick and will cause your bike's transmission to slip.