Duke 2 loss of power when engine under load

Setorwu, Youi will have to check for pararsitic draw of battery or make up a battery isolator. Check the attached links,instruction and guides, Good luck
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KTM 690 SMR battery Isolator
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The vehicle has a built in no load engine REV limiter to prevent damage to the engine from drivers who insist on "gunning the engine".

check the fuel pressure regulator and the map sensor vacuum hoses. as for the not revving above 4000 rpm is what the computer limits the engine to with no load on it, like in park or neutral.

if the spark and compression are rite-then the fuel is at issue-jets need attention or float level ajust

check the tube of the catering stations 99% you dont have enough fuel

sounds like it may be running out of gas under aload it might be carb trouble

marzy306,

Your problem is coming from the waterpump seal. When the seal goes bad it lets oil from the crankcase into the waterpump and vise versa. The only other problem it could be is the head gasket but you would feel a loss of power.

If your old engine ran real bad with oil passing through your exhaust more than likely the catalytic converter is bad

try www.ktmforum.co.uk there's loads of trouble shooting info on there. esp. related to 690 FI

The rev limiter won't allow it to rev above 4000 in park. Will it go above 4000 on the road. Does it miss at ldle or under a load.