paullagrand Posted October 3, 2005 Report Share Posted October 3, 2005 I have the 05 3.2 4t and have used it in two events. At the first event it stalled several times (some rider error, but not all) and it ran so hot that it melted the rear light wiring and shorted out the fan and overheated. So I elimintated the lights wiring harness and solved that problem (bad use of the 2-stroke fender over a four stroke exhaust with 2-stroke wiring path). Went to the second event and the bike ran fine until the second loop when it started to run really ht (fan was working fine) and seemed to start misfiring under load. Then the kick starter top arm broke off (lot's of fun) and the bike ran progressively worse. It would cough up back soot as it misfired at 3/4 revs. So, is my fuel mixture screw off? are my jets wrong? or do I have a shot valve seat that goes really bad when the bike gets really warm? Any thoughts? I would love to enjoy this four stroke and sell my 01 2.9, but I am wondering if maybe taking this plunge was a bad move. paul@thirdcoasttrials.com Quote Link to comment Share on other sites More sharing options...
the artist formerly known as ish Posted October 3, 2005 Report Share Posted October 3, 2005 Paul, did you buy the bike new or used ? The exhaust does get hot compared to a 2 stroke and they will melt wires if in contact with the exhaust, when you say it was running hot, was it pushing coolant out of the overflow?. Is there fuel in the airbox? What jet sizes are in the bike, easy to check without removing the carb, just remove the bowl? I would take it along to the dealer and have him check it out, if you are not sure of what you are doing you could make it worse, and there isn't a lot of information about on the bikes yet. Also where are you located ? Quote Link to comment Share on other sites More sharing options...
alan bechard Posted October 3, 2005 Report Share Posted October 3, 2005 Paul tried to e-mail you but it bounced back. Maybe you could e-mail me at trialsalan at bellsouth dot net Quote Link to comment Share on other sites More sharing options...
paullagrand Posted October 3, 2005 Author Report Share Posted October 3, 2005 I bought the bike brand new. It did overflow the radiator, I shut it off, figured out the wiring issue and refilled the radiator. I am in Grand Rapids, Michigan USA. I have the stock jets in it but I am going to try a #126 main jet and check the float height (per Ryan Young). Quote Link to comment Share on other sites More sharing options...
the artist formerly known as ish Posted October 3, 2005 Report Share Posted October 3, 2005 Ryan will look after you. Few things I have done, if eletrical cables are over the head steady bracket, unplug and run them under it. Oil breather tube, add some to it, so if it does spit some out, and it will if you get her upside down or overfill it, and route it so it doesn't get all over the motor. Use Stock plug gapped at 0.6mm 24 thou. Change oil as per instructions, when filling 700cc in right side filler plug first, then 100 cc in left side plug, make sure the plugs you take out go back in the same hole. Changed mine many times now, trust the measurement, I wasn't sure one time I rode it going by the sight glass and added a few cc's to bring it up the sight glass, she spat it out when I gave her some rev it got on the exhaust looked bad like it was on fire, since I knew what it was I wasn't too concerned, just drained and made sure I put the correct amount in when I got home, also that was what made me extend the oil breather hose. They do take a long time to run in, Quote Link to comment Share on other sites More sharing options...
yorkshirepud Posted October 3, 2005 Report Share Posted October 3, 2005 My Husky 450 enduro ran really hot when new. I put Motul racing coolant in and it really helped, the other change was putting a higher rated radiator cap on. I don't have any problems with it now. Quote Link to comment Share on other sites More sharing options...
paullagrand Posted October 3, 2005 Author Report Share Posted October 3, 2005 Thanks for the tip I will look into other coolant options. It occurs to me that my entire problem may have been caused by one wiring issue and a new plug ( I may have fouled the original up) or a good look at the fuel system may solve the whole thing. I am going to take some temp measurements this weekend and make sure it is running right. May not really be running too hot at all, could be just my misdiagnosis. The thing has bag-loads of power and traction is great, but I am still getting use to the power delivery differences from the 2T. I think it takes a more advanced use of the clutch than I have yet. Quote Link to comment Share on other sites More sharing options...
atomant Posted October 4, 2005 Report Share Posted October 4, 2005 I think it takes a more advanced use of the clutch than I have yet. <{POST_SNAPBACK}> Dont think its all got to do with your technique as I had the same problem. The way the stock setup is with the dellorto it gives a very sharp kick when you open the throttle from low revs. I found this gave rise to the front end jumping away on tight camber locks. I struggled with it for a bit then decided to take the advice from Howard Wallace and fit the Keihin.. The difference is extremely significant and is much much softer at the bottom end ! but still has the grunt from mid range.. You can see the whole dialogue . Click Here The bike is much more friendly to ride now and I truly suggest you give it a try. With reference to the over heating.. Mine now runs with the fan on %90 of the time with the stock plug/coolant/header cap.. Quote Link to comment Share on other sites More sharing options...
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