simondlh Posted April 3, 2009 Share Posted April 3, 2009 Hi all I have a 1991 DTR 125 and when I start the bike up first time it ticks over at usually 1,500rpm but after i've opened up the throttle it sticks at 6,000rpm. To accompany this the temp guage is going into the red after 10 mins of riding plus the water filler at the back of the bike keeps running out. Am i right in thinking that there is a leak somewhere, perhaps cylinder head gasket is blown, which is spitting out the water causing it to overheat and the high revs are due to the air leak also? Any thougths would be greatly appreciated! Link to comment Share on other sites More sharing options...
wild foamy Posted April 3, 2009 Share Posted April 3, 2009 the air leak is the most likely cause of the erratic idling, had that problem with my jawa and it turned out there was a gasket missing from the reed valve assembly. the overheating would also be caused by the lean running, so check your system for perished seals, broken gaskets and rotten rubbers Link to comment Share on other sites More sharing options...
Dave P Posted April 10, 2009 Share Posted April 10, 2009 Hi In terms of the overheating, I also have a 91 DTR125, which was regularly running hot - changed the cylinder head gasket and now everything seems fine. dave Link to comment Share on other sites More sharing options...
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