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Re: Change the engine for a brand new one
The dealership should be able to order a new engine but it would be complete with gearbox etc.. It sounds like you must have messed up the crankshaft and top end. Repairing / replacing the top end is ok for the mechanicly inclined to do but crankshaft replacement is best left to an experienced mechanic. If you replace the engine then save the old one for spare parts.
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I am assuming the carb is in good order. Be sure the battery has a good charge and that the spark plug is giving a strong spark. So you have good fuel delivery and good spark, and the air cleaner should be pretty clean. The problem is usually flooding of the engine by twisting the throttle too much, too often. Each twist sends a shot of gas into the chamber. It is pretty easy to flood the engine.
When my carburetor was really dirty it did this. Try disassembling and cleaning your carburetor internals, while your at it you should get a kit for it so you can replace the seals etc. Another thing to try is to replace your spark plug and lead. Even if these things don't solve your problem it will make it run allot better. Make sure if you haven't done any of this before to get someone experienced to show you.
pull the carb, remove the main jet, take to a motorcycle shop and ask for the next size up and the one after that. Replace jet and ride, if it feels better try the next one up and so on until you no longer feel a better result, then go back one.
the two side....honda is the only compagny that used separate transmission and engine oil (crf 250 and crf 450). the left side is the engine oil and the right side is the transmission. i recommend 5100 motul on the engine and motul 3000 10w40 on the transmission side (motul 3000 is not a transmission oil but it works on fourstroke that normally mix it up to getter ) d,ont forget to replace filter ....hope this will help,if so ....leave me good feedback please.
The crankcase oil fill is the dipstick hole on the left side of the engine. It holds .73 quart. The right side fill plug is for the transmission oil. It holds .63 quart. You will need to drain the transmission oil and refill it with the correct amount of oil. The drain is located on the left lower crankcase. It is bolt/washer in the parts diagram of the link below. I recommend you purchase an owners manual or service manual for this bike as this is a high performance model that requires frequent maintenance. http://184.108.40.206/wps/Honda_OEM/HondaDB.asp?Type=12&A=1
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.