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Varlo

Bogging down

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Hi! Went on my first trial today with my ty250 twinshock! First 10 stages  was fine, after that started to bog down under load. Could it be overheating? Any ideas?

cheers carl 

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Have you got an external fuel filter and is the one in the tank still intact? Don't know if it would gave any bearing on your problem but are filters or fuel line blocked?

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Fuel tap is new & it has an inline filter! I pull tube off carb to make sure it ran through. The only thing I've done is put a new air filter on & oiled it. Could it be engine temp as I've not had it running for this length of time stood still.

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15 hours ago, Varlo said:

Hi! Went on my first trial today with my ty250 twinshock! First 10 stages  was fine, after that started to bog down under load. Could it be overheating? Any ideas?

cheers carl 

Has it just been rebored, or had new rings fitted?

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A reasonable guide to judge if a motor is overheating is to wet your fingertip with saliva and touch the flat surface of a head fin. If the saliva sticks before it evaporates, then it is not overheated but if you can't get it to stick it is possibly too hot. A happy temperature for the heat transfer surfaces of an air-cooled engine is around 100 to 110 degrees C. They do get hotter than that when you ride with sustained open throttle or leave them idling in hot weather.

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It had rebore & wossner piston 6months ago! & electronic ignition 2 week ago! Just spoke to John at ty trials! He said it could be pulling air in when engine gets hotter than normal 

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