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no you cant put them in upsidedown if they are not indexed to fit one way then you can run them either way.we need to consider a few things first spark if we have spark havve we checked the flywheel to make sure the key is not sheared and it is tight. next compression i assume since we did a top end compression is good but what about crank seals if they have never been done and are leaking transmission oil will get on ththe plugs and foul them. next fuel if gas is in the float bowls is it getting though the jets take the air filter off and spray starting fluid in the carb throat kick it if it fires for a second the carb jets need to be cleaned all that is left is air and i know you have that covered i hope this helps these 4 things are what make engines run so if you get all 4 its gonna run good luck dirt bike dan
right you done quite a bit, so whats left, fuel seems ok .. so ht lead ht cap, spark plugs dont always come with right gap, any leaks with airflow either side of carb, remember the filter often acts as a restrictor too. try the putting a small amount of fuel in cyclinder after cleaning plug, should atleast get a backfire, is choke setup ok, carb mix if not factory sealed is generally 1 and 3/4 turns out from tight,
The only way that can happen is if gas is overflowing in the carb and running down the cylinder wall and into the exhaust port and / or into the crankcase. Gearbox oil is separate from the crankcase. The crank gets lubrication from the gas/oil mix. Be sure to turn off the gas valve at the tank when the bike is not in use. If you can manage it, pull the head off, (or at least remove the spark plug ), then, with the piston at bottom of the stroke, turn the bike upside down to drain the gas from the crank. I would then remove and clean the carb to be sure the float is not sticking open. Be sure the overflow line is not blocked. Install an in-line fuel filter. Please rate my answer. Thanks.
My first thought is low compression... which leads to a few questions...
What fuel to oil ratio have you used?
What do you mean by 'fresh top end'? To me a fresh top end includes piston and rings and cylinder bore, gaskets and crank seals. Anything less on a 2-stroke is an incomplete job and usually leads to premature failure.
Have you followed break-in procedure on your fresh top end? Double check the head bolt torque.
A couple of things.1.Check the fuel oil mixture is correct.It seems rich.2.Check that the carby is not running to rich.With new reed valves etc.it may need to be set back to the original manu. specs.With older parts it may have been retuned to make it run with the old parts.(carby jetting etc.)3 make sure the fuel oil mix is using a good quality oil.It does make a world of difference.I hope this is a start to get you going.
Hi I am vortash .. firstly 32 - to - 1 may be a tad high I would say ... it would be fine at the same as the ducati ratio 20-to -1 with a good quality oil , you should check that your sump is not filling with oil as this will cause performance problems with backpressure .. but maybe the best thing to do would be to replace the oil pump and run it as it was designed to do ?. I am sure you will get one off the net cheaply or from a local bike breakers .... Regards Vortash
Your bike is water cooled. Some of that water is leaking into the gear box. The cylinder gasket is the likely leak. I would let the shop take a look at it instead of trying to fix it yourself.
But be sure there is not an external source for the water. Do you wash the bike often? Ride the creek bed often? Leave the bike where the lawn sprinkler gets the bike wet? Leave it out in the rain? Change the oil and keep the bike dry. If the problem comes back then go see the dealer.