pug Posted April 2, 2006 Share Posted April 2, 2006 Today, returning from a ride I had to filter through traffic to get home. At some point, I looked the temp and it was reading 109 to 112 (that's Celsius) which is very high - only in hot summer days I've seen for a moment 105-107. Anyway I managed to keep the temperature down to 105 and to return home. In the midweek when I had the bird in the shop for valve check, I asked them also to replace the coolant with some Motul Motocool. I didn't checked coolant capacity, but gave to mechanic 2lt. When I got home I checked the manual and cool. capac. is 3.9lt so I thought that there is not enough. The fan also didn't work. The expansion bottle was empty so I put about 1lt of coollant. The fan started working BUT was spinning very slowly and eratically, i.e. like it is connected to a very small starter-it doesn't spin continiously. Moreover, I checked the fan by hand and it does not rotate freely (as it used to be), it feels like grinding. I disconnected the fan relay and the cooling fan motor connector and sprayed some electric contact lube (or whatever). I've read the manual pages 19-24 to 19-26, but didn't do any tests because I don't have a polymeter or test wires right now (I'll have tommorow). However since the fan is rotating, I don't think I have to check continuity or the relay. Maybe the only usefull test is the one in the bottom of page 19-25 with the jumper wire (so I don't have to warm up the engine to check the fan). Something I forgot to mention is that when I bought the bike, the previous owner had a small crash (car hit him from the LH side), and I foundthat the fan was touching the radiator, so I moved a little back. So my diagnosis is that I need a new fan (which is about 140$ at Ron Ayers, which means double over here). Any suggestions? Quote Link to comment Share on other sites More sharing options...
Northman Posted April 2, 2006 Share Posted April 2, 2006 Wait till the engine cools, then re-check the coolant level in the radiator, as well as in the overflow bottle. And I agree with your diagnosis that the fan has gone bad. Try jumping the relay to see if the fan turns, or go ahead and give the fan itself a full 12V of power. If it spins slowly, or erratically, then replace it. Probably find one used if you look around. Quote Link to comment Share on other sites More sharing options...
Iceman_40 Posted April 2, 2006 Share Posted April 2, 2006 Figure out what wires are the neg and pos on the fan and hook directly up to the battery before you buy a new fan. If it works find with power straight from the battery it's likely not the fan. Quote Link to comment Share on other sites More sharing options...
pug Posted April 2, 2006 Author Share Posted April 2, 2006 One thing I forgot to mention, is that since I had to install my repaired nose fairing (more of that here in Greek but you'll get the idea from the pictures), yesterday I washed and then silicone-sprayed the bird while it was naked. I think that the silicon spray was a bad idea (although I didn't spray directly to the radiator) Quote Link to comment Share on other sites More sharing options...
tomek Posted April 3, 2006 Share Posted April 3, 2006 What happened ? Have you crashed,etc? I`m asking this maybe wiring is damaged,or are some objects in the fan that prevent it from spinning free. Connects the fan straight ( jump) to battery to eliminate the possibility of broken harness (wires) As far as silicone,I hope you did not sprayed your tires Quote Link to comment Share on other sites More sharing options...
pug Posted April 3, 2006 Author Share Posted April 3, 2006 What happened ? Have you crashed,etc? Not this time, this was made in the parking lot at work but I don't know who did it (and that's why I am not behind bars ). I used to park the bird with the mirrors folded, so probably somebody hit the mirror..... As far as silicone,I hope you did not sprayed your tires Not directly, but you never can be sure Quote Link to comment Share on other sites More sharing options...
pug Posted April 3, 2006 Author Share Posted April 3, 2006 Cost of new fan motor 143 euros (with 15% discount), a complete cooling fan from the breakers about 60. If the used is in good con i"ll hit it. Quote Link to comment Share on other sites More sharing options...
pug Posted April 3, 2006 Author Share Posted April 3, 2006 I've got the used fan but unfortunately is not exactly the same. The motor is different (a bit smaller physically with different bolts), the bracket is different and finally the socket is diferrent. The fan is same design except the centre. Perhaps with little work I can fit it but I think I will return it and buy a new one. I did the manual's pg.19-25 test (bridging the relay) and the used fan works ok, so the harness is ok. Also my battery's voltage was 12.2 volts so I 'll have to recharge a bit. Finally I connected the old fan straight to the battery and it was making bad noise (like a relay but it was the fan's motor) and didn't work. Does anybody know which YM Blackbird this fan is for (in the top right)? [attachmentid=460] Sockets, in the right the one that is on my Bird.. [attachmentid=461] And the original fan motor dismantled... [attachmentid=462] Quote Link to comment Share on other sites More sharing options...
pug Posted April 5, 2006 Author Share Posted April 5, 2006 Update Yesterday I tested again the orifinal motor and ...it was working. I guess there was remaining humidity inside the motor that was causing short-circuit. Since the inner bearing had signs of wear on O.D and it was noisy I replaced both bearings (types 607Z and 607S small differences in the letter codes if you shop SKF). [attachmentid=488] Also cleaned the inners with appropriate sprays and sealed the casing with some silicone. As good as new (for the time being) Quote Link to comment Share on other sites More sharing options...
Obby Posted April 5, 2006 Share Posted April 5, 2006 These birds sure aren't very rain worthy. Don't ask me how I know . Quote Link to comment Share on other sites More sharing options...
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