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wildbill

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  1. Hi. Mounted and secured new fan motor with fresh connectors and all earths cleaned. Started bike and on idle fan turns over quietly and steadily in ACW direction and the voltage across fan wires is reading a more realistic 12.3v DC (with a faint reading on AC of 1.2v). It would seem that the problem is now resolved so I can only think that it was a combination of a dodgy fan motor and poor cable connections and corroded earths. Getting old doesn't seem to be good for the bike or the rider! Thanks for your help Bill
  2. Hi That's a five. Fitted a second hand fan from a Honda 125 today and this motor will spin CW and ACW on Gas Gas with engine running, depending on which way round connectors are fitted. Having stripped both Honda and Gas Gas fan motors from their respective mountings, they both have a directional arrow on the label on motor body that shows the motor should spin ACW. Motor functional - One problem solved! Am liking your latest diagnosis re partial failure of rectifier, although new motor will spin quite happily both ways whereas the original motor would only spin CW. Now I will recheck voltage across the new motor for both DC and AC and look to fit a new rectifier if reqd. Bill
  3. Hi. Forgot to say I have only checked the Honda fan direct from a battery. Will try on Gas Gas tomorrow to see if it will spin up in both directions. Did check my Beta Rev 3 fan this aft and it spins anti clockwise. Fan blades on Beta seem to be same orientation as Gas Gas so I guess the fan should spin anti clock and therefore suck rather than blow! Hey ho! Bill
  4. Hi TLTEL. Checked the fan again today and when sat on the bike the fan is rotating clockwise. I tried to sort out whether it is sucking or blowing by placing a piece of tissue paper close to the joint of the fan mounting to radiator and it appears to be blowing. To be fair, I have never really noticed which way it ran prior to this problem and as I said in my earlier post the fan will not run with the connecting wires reversed. The fan is a little noisy (it is 20 yrs old!) but does spin at a fair rate. Maybe there is a problem with the fan motor too as I have a spare Honda 125 fan motor and that happily spins in either direction depending on how wires are connected Bill
  5. Hi TLTEL - The fan will only work in one direction. If I connect the motor feed wires the other way the fan motor will not turn, it just seems to become 'energised' and resists being turned in either direction with my finger. That's a five - Think you may be correct. I have bought a cheap rectifier as suggested by a post on this forum @Cheap rectifier replacement'. I will try to find some time to wire it up now that I have got Christmas out of the way. Bill
  6. Hi. Did a bit more work on the wiring leading up to Christmas. Checked voltages across feed wires to fan again following changes to connectors and cleaning terminals. With engine on idle, got readings of 26V DC and 4.5v AC! Don't know whats happening there! In the end I cleaned the terminals again and cut back some of the wires that appeared to have corroded inside the plastic insulation and fitted new connectors. Tested again and got 27V DC and 5.7v AC this time! In a fit of frustration I connected the fan wires the other way round, started engine and hey presto - working fan again! The fan even turns over now just by turning engine over on kickstart! Electrics - don't you just love em!!! Thanks for all replies Bill
  7. Just spent some time replacing a few suspect connectors and rigging up an additional earth from engine casing to frame and retested electrics. Still getting a reading of 26 - 27v across fan feed wires when engine is running and fan is disconnected. When engine is running and fan is reconnected I am getting a reading of only 6v across the fan feed wires?! Bill
  8. Hi that's_a_five Just checked voltage across fan feed wires with engine running at tickover and its 26.5v. Presumably this means that regulator is not working correctly as the feed should only be around 12v? Bill
  9. Hi lineaway. Thanks for the quick response. Excuse my electrical ignorance but in order to test the power going to the fan do I just put the leads of a multimeter across the 2 fan motor wires with the engine running and would I then expect to see a reading of around 12v DC? Bill
  10. Hi. I am wondering if any electrical experts out there can help me with a little problem. I have dragged my 1993 GT32 Contact 327 out to check it over ready for what is generally its only outing of the year. Due to several other bikes being available it doesn't see the light of day very often and only gets started every couple of months or so. As the original Motoplat system has been replaced by a later Kokusan set up, starting is rarely a problem. Due to a faulty thermostat (type that screws directly into the head) when I bought the bike, I wired it to be permanently on some while ago. No problems - until today. Started up as usual but no fan! Tried flicking fan to see if it was sticking but no joy. Turned engine off and flicked fan and it spins freely. Connected fan to a battery and it spins up OK. Only other thing I noticed is with the engine running, the fan seems to be 'energised' and actually resists being turned. Turn engine off again and it will spin quite happily with a flick. Could this be a sign of a failed rec/reg? Any ideas or comments gratefully accepted (except stick the bike in the bin and get a new one!!) Bill
  11. Hi. Just put a pair of marzocchis on my TY recently - think they may have been from a Fantic rather than Montesa though. I used the Marzocchi yokes and I found a few problems. Firstly the stem diameter is smaller than TY item so I had to turn some spacers to sleeve the bearing races in order to use the Yamaha races in the headstock. Second problem I came across was that the headstock lower face fouled on the top of the bottom yoke. I had to grind the bottom edge of the headstock in order to allow the forks to turn from side to side instead of binding. I also found that the stem is slightly shorter than TY. As you will see it is not a straight swap! On the plus side they appear to have a better action than the TY forks and have a similar rake to my Beta Rev 3, also the handlebar mounts are further forward than the TY. (Frame has had 'Majesty' type mod to rear shock mount and is fitted with 360mm shocks so this may also help with the rake) Don't know what they are like in action yet though as I still have to rebuild the TY engine. Hope this helps Regards Bill
  12. Hi. Woosters m/cycles on A64 near Seacroft, Leeds or NTB racing at Wigginton near York Bill
  13. wildbill

    Rev 3 2004 Stator

    Hi Paul Had my 2005 Rev 3 done by West Country Windings about 2 years ago after same problem and was about
  14. Thanks for the suggestion. Will give that a try. Certainly a lot easier to do than stripping and rebuilding the motor at least for a start. Bill
  15. Hi Brian. Took the Seeley out for a play today and it does seem that the kickstart slips a little less once the bike is warmed up. Bike outperforms the rider and I am very pleased with it apart from the kickstart problem. Noticed that it takes a little while to restart when dropped on its side too! Bill
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